/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 14:19:58,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 14:19:58,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 14:19:58,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 14:19:58,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 14:19:58,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 14:19:58,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 14:19:58,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 14:19:58,348 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 14:19:58,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 14:19:58,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 14:19:58,349 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 14:19:58,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 14:19:58,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 14:19:58,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 14:19:58,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 14:19:58,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 14:19:58,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 14:19:58,350 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 14:19:58,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 14:19:58,350 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 14:19:58,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 14:19:58,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 14:19:58,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 14:19:58,351 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 14:19:58,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 14:19:58,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:19:58,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 14:19:58,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 14:19:58,352 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 14:19:58,352 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 14:19:58,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 14:19:58,352 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 14:19:58,352 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 14:19:58,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 14:19:58,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 14:19:58,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 14:19:58,585 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 14:19:58,586 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 14:19:58,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2022-04-06 14:19:58,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7973ce640/a96a494b8a074677bdd400014627f329/FLAG6bc0cbbac [2022-04-06 14:19:59,025 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 14:19:59,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2022-04-06 14:19:59,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7973ce640/a96a494b8a074677bdd400014627f329/FLAG6bc0cbbac [2022-04-06 14:19:59,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7973ce640/a96a494b8a074677bdd400014627f329 [2022-04-06 14:19:59,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 14:19:59,047 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 14:19:59,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 14:19:59,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 14:19:59,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 14:19:59,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e1cedf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59, skipping insertion in model container [2022-04-06 14:19:59,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 14:19:59,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 14:19:59,203 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-04-06 14:19:59,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:19:59,238 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 14:19:59,248 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-04-06 14:19:59,262 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:19:59,278 INFO L208 MainTranslator]: Completed translation [2022-04-06 14:19:59,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59 WrapperNode [2022-04-06 14:19:59,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 14:19:59,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 14:19:59,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 14:19:59,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 14:19:59,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 14:19:59,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 14:19:59,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 14:19:59,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 14:19:59,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (1/1) ... [2022-04-06 14:19:59,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:19:59,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:19:59,356 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 14:19:59,368 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 14:19:59,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 14:19:59,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 14:19:59,397 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 14:19:59,397 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 14:19:59,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 14:19:59,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 14:19:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 14:19:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 14:19:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 14:19:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 14:19:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 14:19:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 14:19:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 14:19:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 14:19:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-06 14:19:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 14:19:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 14:19:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 14:19:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 14:19:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 14:19:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 14:19:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 14:19:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 14:19:59,452 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 14:19:59,454 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 14:19:59,697 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 14:19:59,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 14:19:59,703 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-06 14:19:59,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:19:59 BoogieIcfgContainer [2022-04-06 14:19:59,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 14:19:59,706 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 14:19:59,706 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 14:19:59,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 14:19:59,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 02:19:59" (1/3) ... [2022-04-06 14:19:59,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc4a608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:19:59, skipping insertion in model container [2022-04-06 14:19:59,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:19:59" (2/3) ... [2022-04-06 14:19:59,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc4a608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:19:59, skipping insertion in model container [2022-04-06 14:19:59,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:19:59" (3/3) ... [2022-04-06 14:19:59,716 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-04-06 14:19:59,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 14:19:59,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 14:19:59,757 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 14:19:59,762 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 14:19:59,763 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 14:19:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 14:19:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 14:19:59,781 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:19:59,782 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 14:19:59,782 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:19:59,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:19:59,787 INFO L85 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 1 times [2022-04-06 14:19:59,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:19:59,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [609355577] [2022-04-06 14:19:59,803 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:19:59,803 INFO L85 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 2 times [2022-04-06 14:19:59,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:19:59,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6105140] [2022-04-06 14:19:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:19:59,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:19:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:59,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:19:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:19:59,984 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 14:19:59,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:19:59,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6105140] [2022-04-06 14:19:59,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6105140] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:59,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:59,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:19:59,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:19:59,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [609355577] [2022-04-06 14:19:59,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [609355577] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:19:59,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:19:59,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:19:59,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395995659] [2022-04-06 14:19:59,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:19:59,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 14:19:59,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:00,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 14:20:00,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:20:00,028 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 4.666666666666667) internal successors, (14), 2 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 14:20:00,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:00,085 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2022-04-06 14:20:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 14:20:00,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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 14:20:00,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:00,095 INFO L225 Difference]: With dead ends: 66 [2022-04-06 14:20:00,095 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 14:20:00,098 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 14:20:00,101 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 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 14:20:00,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:20:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 14:20:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 14:20:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-04-06 14:20:00,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2022-04-06 14:20:00,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:00,145 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-04-06 14:20:00,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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 14:20:00,146 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-04-06 14:20:00,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 14:20:00,148 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:00,148 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 14:20:00,148 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 14:20:00,149 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:00,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 1 times [2022-04-06 14:20:00,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:00,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1813408279] [2022-04-06 14:20:00,151 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:20:00,151 INFO L85 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 2 times [2022-04-06 14:20:00,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:00,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201285957] [2022-04-06 14:20:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:00,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:00,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:00,273 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 14:20:00,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:00,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201285957] [2022-04-06 14:20:00,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201285957] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:00,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:00,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:20:00,274 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:00,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1813408279] [2022-04-06 14:20:00,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1813408279] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:00,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:00,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:20:00,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262315630] [2022-04-06 14:20:00,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:00,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:20:00,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:00,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:20:00,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 14:20:00,277 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 14:20:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:00,378 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-04-06 14:20:00,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:20:00,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 14:20:00,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:00,380 INFO L225 Difference]: With dead ends: 67 [2022-04-06 14:20:00,380 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 14:20:00,381 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 14:20:00,382 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:00,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 14:20:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-04-06 14:20:00,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-04-06 14:20:00,390 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2022-04-06 14:20:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:00,390 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-04-06 14:20:00,391 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 14:20:00,391 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-04-06 14:20:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 14:20:00,391 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:00,392 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 14:20:00,392 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 14:20:00,392 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:00,393 INFO L85 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 1 times [2022-04-06 14:20:00,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:00,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1057763660] [2022-04-06 14:20:00,434 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:00,434 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:00,434 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:00,434 INFO L85 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 2 times [2022-04-06 14:20:00,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:00,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935617613] [2022-04-06 14:20:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:00,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:00,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:20:00,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:00,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935617613] [2022-04-06 14:20:00,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935617613] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:00,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855838074] [2022-04-06 14:20:00,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:00,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:00,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:00,586 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 14:20:00,607 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 14:20:00,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 14:20:00,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:00,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 14:20:00,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:20:00,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 14:20:00,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855838074] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:00,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 14:20:00,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-04-06 14:20:00,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:00,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1057763660] [2022-04-06 14:20:00,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1057763660] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:00,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:00,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:20:00,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071574185] [2022-04-06 14:20:00,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:00,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:20:00,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:00,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:20:00,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 14:20:00,768 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 14:20:00,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:00,811 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-04-06 14:20:00,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:20:00,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 22 [2022-04-06 14:20:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:00,817 INFO L225 Difference]: With dead ends: 55 [2022-04-06 14:20:00,817 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 14:20:00,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 14:20:00,823 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:00,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 152 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:20:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 14:20:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-04-06 14:20:00,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-04-06 14:20:00,832 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-04-06 14:20:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:00,832 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-04-06 14:20:00,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 14:20:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-04-06 14:20:00,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 14:20:00,833 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:00,833 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, 1, 1, 1, 1, 1] [2022-04-06 14:20:00,864 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 14:20:01,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:01,056 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:01,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1521854123, now seen corresponding path program 1 times [2022-04-06 14:20:01,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:01,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236253130] [2022-04-06 14:20:01,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:01,058 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:01,059 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:01,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1521854123, now seen corresponding path program 2 times [2022-04-06 14:20:01,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:01,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337458896] [2022-04-06 14:20:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:01,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:01,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:01,169 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 14:20:01,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:01,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337458896] [2022-04-06 14:20:01,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337458896] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:01,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519067659] [2022-04-06 14:20:01,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:01,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:01,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:01,172 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 14:20:01,173 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 14:20:01,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:01,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:01,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:20:01,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:01,295 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 14:20:01,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 14:20:01,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519067659] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:01,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 14:20:01,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-04-06 14:20:01,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:01,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236253130] [2022-04-06 14:20:01,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236253130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:01,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:01,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:20:01,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992196304] [2022-04-06 14:20:01,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:01,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:20:01,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:20:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 14:20:01,298 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:01,343 INFO L93 Difference]: Finished difference Result 100 states and 133 transitions. [2022-04-06 14:20:01,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:20:01,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 14:20:01,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:01,348 INFO L225 Difference]: With dead ends: 100 [2022-04-06 14:20:01,348 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 14:20:01,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 14:20:01,349 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:01,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 69 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:20:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 14:20:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2022-04-06 14:20:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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 14:20:01,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2022-04-06 14:20:01,359 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 28 [2022-04-06 14:20:01,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:01,360 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2022-04-06 14:20:01,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:01,360 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2022-04-06 14:20:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 14:20:01,361 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:01,361 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, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:01,379 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 14:20:01,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 14:20:01,572 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2104041838, now seen corresponding path program 1 times [2022-04-06 14:20:01,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:01,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [317667720] [2022-04-06 14:20:01,574 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:01,575 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:01,575 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:01,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2104041838, now seen corresponding path program 2 times [2022-04-06 14:20:01,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:01,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804383668] [2022-04-06 14:20:01,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:01,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:01,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 14:20:01,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:01,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804383668] [2022-04-06 14:20:01,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804383668] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:01,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027488213] [2022-04-06 14:20:01,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:01,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:01,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:01,662 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 14:20:01,664 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 14:20:01,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:01,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:01,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 14:20:01,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:01,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-04-06 14:20:01,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-04-06 14:20:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:20:01,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 14:20:02,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027488213] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:02,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:20:02,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-04-06 14:20:02,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:02,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [317667720] [2022-04-06 14:20:02,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [317667720] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:02,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:02,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:20:02,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793395830] [2022-04-06 14:20:02,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:02,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:20:02,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:02,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:20:02,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-04-06 14:20:02,142 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 14:20:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:02,265 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2022-04-06 14:20:02,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:20:02,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 29 [2022-04-06 14:20:02,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:02,266 INFO L225 Difference]: With dead ends: 67 [2022-04-06 14:20:02,266 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 14:20:02,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-04-06 14:20:02,267 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:02,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 133 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:20:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 14:20:02,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 14:20:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-04-06 14:20:02,284 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 29 [2022-04-06 14:20:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:02,284 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-04-06 14:20:02,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 14:20:02,284 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-04-06 14:20:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 14:20:02,285 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:02,285 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:02,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:02,486 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:02,486 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:02,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:02,487 INFO L85 PathProgramCache]: Analyzing trace with hash 130872262, now seen corresponding path program 1 times [2022-04-06 14:20:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:02,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [517326120] [2022-04-06 14:20:02,489 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:02,489 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:02,489 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:02,489 INFO L85 PathProgramCache]: Analyzing trace with hash 130872262, now seen corresponding path program 2 times [2022-04-06 14:20:02,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:02,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440866457] [2022-04-06 14:20:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:02,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:02,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:20:02,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:02,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440866457] [2022-04-06 14:20:02,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440866457] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:02,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239663142] [2022-04-06 14:20:02,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:02,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:02,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:02,597 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 14:20:02,599 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 14:20:02,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:02,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 14:20:02,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:02,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-04-06 14:20:02,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:02,822 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 14:20:02,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 14:20:02,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239663142] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:02,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:20:02,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 8] total 13 [2022-04-06 14:20:02,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:02,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [517326120] [2022-04-06 14:20:02,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [517326120] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:02,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:02,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:20:02,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584865067] [2022-04-06 14:20:02,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:02,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:20:02,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:02,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:20:02,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-06 14:20:02,989 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:03,135 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-04-06 14:20:03,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:20:03,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 14:20:03,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:03,136 INFO L225 Difference]: With dead ends: 72 [2022-04-06 14:20:03,136 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 14:20:03,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-04-06 14:20:03,137 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:03,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 104 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:03,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 14:20:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2022-04-06 14:20:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-04-06 14:20:03,148 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 30 [2022-04-06 14:20:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:03,149 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-04-06 14:20:03,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-04-06 14:20:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 14:20:03,150 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:03,150 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:03,178 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 14:20:03,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:03,372 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1933277107, now seen corresponding path program 1 times [2022-04-06 14:20:03,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:03,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [229024744] [2022-04-06 14:20:03,375 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:03,375 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:03,375 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:03,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1933277107, now seen corresponding path program 2 times [2022-04-06 14:20:03,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:03,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525927503] [2022-04-06 14:20:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:03,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:03,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 14:20:03,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:03,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525927503] [2022-04-06 14:20:03,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525927503] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:03,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374160828] [2022-04-06 14:20:03,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:03,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:03,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:03,452 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 14:20:03,454 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 14:20:03,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:03,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:03,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 14:20:03,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 14:20:03,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:20:03,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374160828] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:03,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:03,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 9 [2022-04-06 14:20:03,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:03,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [229024744] [2022-04-06 14:20:03,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [229024744] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:03,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:03,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:20:03,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153378722] [2022-04-06 14:20:03,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:03,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 14:20:03,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:03,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 14:20:03,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-04-06 14:20:03,646 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 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 14:20:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:03,777 INFO L93 Difference]: Finished difference Result 133 states and 177 transitions. [2022-04-06 14:20:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 14:20:03,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 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 31 [2022-04-06 14:20:03,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:03,779 INFO L225 Difference]: With dead ends: 133 [2022-04-06 14:20:03,779 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 14:20:03,779 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 14:20:03,780 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 95 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:03,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 40 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 14:20:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 49. [2022-04-06 14:20:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-04-06 14:20:03,810 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 31 [2022-04-06 14:20:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:03,811 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-04-06 14:20:03,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 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 14:20:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-04-06 14:20:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 14:20:03,814 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:03,814 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:03,840 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 14:20:04,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:04,038 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:04,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1557440111, now seen corresponding path program 3 times [2022-04-06 14:20:04,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:04,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1409019565] [2022-04-06 14:20:04,041 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:04,041 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:04,041 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1557440111, now seen corresponding path program 4 times [2022-04-06 14:20:04,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:04,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162224239] [2022-04-06 14:20:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:04,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 14:20:04,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:04,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162224239] [2022-04-06 14:20:04,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162224239] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:04,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907503925] [2022-04-06 14:20:04,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:04,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:04,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:04,119 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 14:20:04,120 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 14:20:04,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:04,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:04,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 14:20:04,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:20:04,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 14:20:04,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907503925] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:04,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:04,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-04-06 14:20:04,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:04,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1409019565] [2022-04-06 14:20:04,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1409019565] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:04,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:04,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:20:04,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096995068] [2022-04-06 14:20:04,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:04,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:20:04,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:04,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:20:04,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:20:04,358 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:04,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:04,540 INFO L93 Difference]: Finished difference Result 160 states and 215 transitions. [2022-04-06 14:20:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:20:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 14:20:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:04,543 INFO L225 Difference]: With dead ends: 160 [2022-04-06 14:20:04,543 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 14:20:04,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 14:20:04,544 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 143 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:04,545 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 50 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:04,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 14:20:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 51. [2022-04-06 14:20:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-04-06 14:20:04,563 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 33 [2022-04-06 14:20:04,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:04,563 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-04-06 14:20:04,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-04-06 14:20:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 14:20:04,565 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:04,566 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:04,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 14:20:04,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:04,788 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:04,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:04,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1767228433, now seen corresponding path program 5 times [2022-04-06 14:20:04,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:04,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [941738165] [2022-04-06 14:20:04,790 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:04,790 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:04,790 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1767228433, now seen corresponding path program 6 times [2022-04-06 14:20:04,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:04,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094795039] [2022-04-06 14:20:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:04,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:04,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 14:20:04,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:04,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094795039] [2022-04-06 14:20:04,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094795039] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:04,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734335833] [2022-04-06 14:20:04,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:20:04,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:04,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:04,875 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 14:20:04,905 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 14:20:04,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 14:20:04,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:04,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 14:20:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 14:20:05,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 14:20:05,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734335833] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:05,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:05,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 13 [2022-04-06 14:20:05,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:05,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [941738165] [2022-04-06 14:20:05,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [941738165] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:05,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:05,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:20:05,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575551713] [2022-04-06 14:20:05,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:05,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:20:05,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:05,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:20:05,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-04-06 14:20:05,129 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 14:20:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:05,369 INFO L93 Difference]: Finished difference Result 187 states and 253 transitions. [2022-04-06 14:20:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:20:05,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 35 [2022-04-06 14:20:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:05,370 INFO L225 Difference]: With dead ends: 187 [2022-04-06 14:20:05,370 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 14:20:05,371 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-04-06 14:20:05,371 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 176 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:05,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 67 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:20:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 14:20:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 53. [2022-04-06 14:20:05,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2022-04-06 14:20:05,385 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 35 [2022-04-06 14:20:05,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:05,386 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2022-04-06 14:20:05,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 14:20:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2022-04-06 14:20:05,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 14:20:05,387 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:05,387 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:05,412 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 14:20:05,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:05,608 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:05,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1510342963, now seen corresponding path program 7 times [2022-04-06 14:20:05,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:05,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [845365377] [2022-04-06 14:20:05,610 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:05,610 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:05,610 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:05,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1510342963, now seen corresponding path program 8 times [2022-04-06 14:20:05,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:05,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271063505] [2022-04-06 14:20:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:05,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:05,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 14:20:05,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:05,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271063505] [2022-04-06 14:20:05,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271063505] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:05,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5815524] [2022-04-06 14:20:05,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:05,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:05,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:05,712 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 14:20:05,740 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 14:20:05,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:05,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:05,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 14:20:05,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 14:20:05,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 14:20:06,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5815524] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:06,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:06,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 10] total 19 [2022-04-06 14:20:06,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:06,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [845365377] [2022-04-06 14:20:06,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [845365377] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:06,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:06,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:20:06,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590143840] [2022-04-06 14:20:06,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:06,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:20:06,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:06,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:20:06,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-04-06 14:20:06,066 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 14:20:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:06,420 INFO L93 Difference]: Finished difference Result 214 states and 291 transitions. [2022-04-06 14:20:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:20:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 37 [2022-04-06 14:20:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:06,422 INFO L225 Difference]: With dead ends: 214 [2022-04-06 14:20:06,422 INFO L226 Difference]: Without dead ends: 176 [2022-04-06 14:20:06,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:20:06,425 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 194 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:06,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 89 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:20:06,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-06 14:20:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 55. [2022-04-06 14:20:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.26) internal successors, (63), 50 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 14:20:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-04-06 14:20:06,441 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 37 [2022-04-06 14:20:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:06,441 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-04-06 14:20:06,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 14:20:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-04-06 14:20:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 14:20:06,442 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:06,442 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:06,472 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 14:20:06,664 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 14:20:06,664 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:06,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:06,665 INFO L85 PathProgramCache]: Analyzing trace with hash 543457835, now seen corresponding path program 9 times [2022-04-06 14:20:06,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:06,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [565845588] [2022-04-06 14:20:06,666 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:06,667 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:06,667 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:06,667 INFO L85 PathProgramCache]: Analyzing trace with hash 543457835, now seen corresponding path program 10 times [2022-04-06 14:20:06,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:06,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053014382] [2022-04-06 14:20:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:06,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:06,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 14:20:06,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:06,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053014382] [2022-04-06 14:20:06,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053014382] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:06,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025038765] [2022-04-06 14:20:06,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:06,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:06,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:06,745 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 14:20:06,746 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 14:20:06,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:06,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:06,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 14:20:06,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 14:20:06,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 14:20:06,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025038765] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:06,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:06,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-04-06 14:20:06,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:06,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [565845588] [2022-04-06 14:20:06,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [565845588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:06,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:06,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:20:06,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959552543] [2022-04-06 14:20:06,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:06,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 14:20:06,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:06,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 14:20:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 14:20:06,983 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 14:20:07,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:07,080 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2022-04-06 14:20:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 14:20:07,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 14:20:07,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:07,082 INFO L225 Difference]: With dead ends: 110 [2022-04-06 14:20:07,082 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 14:20:07,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 14:20:07,082 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:07,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 40 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 14:20:07,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2022-04-06 14:20:07,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:07,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-04-06 14:20:07,114 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 39 [2022-04-06 14:20:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:07,115 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-04-06 14:20:07,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 14:20:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-04-06 14:20:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 14:20:07,119 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:07,119 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:07,143 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 14:20:07,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:07,342 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:07,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:07,343 INFO L85 PathProgramCache]: Analyzing trace with hash -334288281, now seen corresponding path program 11 times [2022-04-06 14:20:07,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:07,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1229281795] [2022-04-06 14:20:07,344 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:07,344 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:07,344 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:07,344 INFO L85 PathProgramCache]: Analyzing trace with hash -334288281, now seen corresponding path program 12 times [2022-04-06 14:20:07,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:07,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876556365] [2022-04-06 14:20:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:07,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:07,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 14:20:07,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:07,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876556365] [2022-04-06 14:20:07,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876556365] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:07,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746044247] [2022-04-06 14:20:07,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:20:07,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:07,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:07,481 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 14:20:07,483 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 14:20:07,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 14:20:07,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:07,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 14:20:07,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 14:20:07,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 14:20:07,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746044247] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:07,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:07,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2022-04-06 14:20:07,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:07,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1229281795] [2022-04-06 14:20:07,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1229281795] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:07,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:07,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:20:07,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587252856] [2022-04-06 14:20:07,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:07,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:20:07,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:07,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:20:07,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:20:07,767 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 14:20:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:08,067 INFO L93 Difference]: Finished difference Result 255 states and 333 transitions. [2022-04-06 14:20:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:20:08,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 42 [2022-04-06 14:20:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:08,070 INFO L225 Difference]: With dead ends: 255 [2022-04-06 14:20:08,070 INFO L226 Difference]: Without dead ends: 229 [2022-04-06 14:20:08,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-04-06 14:20:08,072 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 143 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:08,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 57 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-04-06 14:20:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 77. [2022-04-06 14:20:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 72 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2022-04-06 14:20:08,105 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 42 [2022-04-06 14:20:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:08,105 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2022-04-06 14:20:08,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 14:20:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2022-04-06 14:20:08,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 14:20:08,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:08,106 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:08,132 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 14:20:08,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 14:20:08,330 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:08,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1673688413, now seen corresponding path program 13 times [2022-04-06 14:20:08,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:08,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1207626353] [2022-04-06 14:20:08,332 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:08,332 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:08,332 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:08,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1673688413, now seen corresponding path program 14 times [2022-04-06 14:20:08,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:08,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562919155] [2022-04-06 14:20:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:08,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:08,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 14:20:08,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:08,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562919155] [2022-04-06 14:20:08,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562919155] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:08,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795390317] [2022-04-06 14:20:08,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:08,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:08,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:08,509 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 14:20:08,510 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 14:20:08,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:08,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:08,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 14:20:08,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:08,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 14:20:08,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:09,177 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:20:09,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:20:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 14:20:09,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795390317] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:09,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:09,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 9] total 26 [2022-04-06 14:20:09,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:09,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1207626353] [2022-04-06 14:20:09,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1207626353] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:09,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:09,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:20:09,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861488155] [2022-04-06 14:20:09,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:09,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:20:09,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:09,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:20:09,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:20:09,251 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:09,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:09,805 INFO L93 Difference]: Finished difference Result 349 states and 459 transitions. [2022-04-06 14:20:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:20:09,805 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 14:20:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:09,807 INFO L225 Difference]: With dead ends: 349 [2022-04-06 14:20:09,807 INFO L226 Difference]: Without dead ends: 323 [2022-04-06 14:20:09,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 14:20:09,808 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 189 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:09,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 110 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:20:09,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-04-06 14:20:09,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 81. [2022-04-06 14:20:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 76 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2022-04-06 14:20:09,836 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 46 [2022-04-06 14:20:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:09,836 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2022-04-06 14:20:09,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2022-04-06 14:20:09,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 14:20:09,837 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:09,837 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:09,861 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 14:20:10,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 14:20:10,060 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:10,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1941482157, now seen corresponding path program 15 times [2022-04-06 14:20:10,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:10,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1567721649] [2022-04-06 14:20:10,061 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:10,061 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:10,062 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:10,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1941482157, now seen corresponding path program 16 times [2022-04-06 14:20:10,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:10,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838130858] [2022-04-06 14:20:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:10,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:10,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 14:20:10,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:10,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838130858] [2022-04-06 14:20:10,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838130858] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:10,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295616911] [2022-04-06 14:20:10,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:10,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:10,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:10,221 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 14:20:10,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 14:20:10,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:10,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:10,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 14:20:10,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:10,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 14:20:10,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:11,020 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:20:11,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:20:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 14:20:11,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295616911] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:11,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:11,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 29 [2022-04-06 14:20:11,107 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:11,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1567721649] [2022-04-06 14:20:11,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1567721649] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:11,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:11,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:20:11,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12552988] [2022-04-06 14:20:11,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:11,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:20:11,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:11,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:20:11,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-04-06 14:20:11,109 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 14:20:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:11,852 INFO L93 Difference]: Finished difference Result 443 states and 585 transitions. [2022-04-06 14:20:11,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:20:11,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 50 [2022-04-06 14:20:11,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:11,856 INFO L225 Difference]: With dead ends: 443 [2022-04-06 14:20:11,856 INFO L226 Difference]: Without dead ends: 417 [2022-04-06 14:20:11,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:20:11,857 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 317 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:11,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 136 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:20:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-04-06 14:20:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 85. [2022-04-06 14:20:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-04-06 14:20:11,888 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 50 [2022-04-06 14:20:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:11,889 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-04-06 14:20:11,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 14:20:11,889 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-04-06 14:20:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 14:20:11,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:11,889 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:11,920 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 14:20:12,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 14:20:12,100 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:12,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:12,100 INFO L85 PathProgramCache]: Analyzing trace with hash 28908263, now seen corresponding path program 1 times [2022-04-06 14:20:12,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:12,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2090084411] [2022-04-06 14:20:12,101 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:12,101 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:12,101 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:12,101 INFO L85 PathProgramCache]: Analyzing trace with hash 28908263, now seen corresponding path program 2 times [2022-04-06 14:20:12,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:12,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954734612] [2022-04-06 14:20:12,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:12,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:12,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 14:20:12,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:12,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954734612] [2022-04-06 14:20:12,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954734612] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:12,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648578664] [2022-04-06 14:20:12,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:12,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:12,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:12,290 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 14:20:12,318 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 14:20:12,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:12,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:12,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 14:20:12,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 14:20:12,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 14:20:12,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648578664] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:12,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:12,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 23 [2022-04-06 14:20:12,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:12,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2090084411] [2022-04-06 14:20:12,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2090084411] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:12,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:12,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:20:12,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979376698] [2022-04-06 14:20:12,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:12,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:20:12,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:12,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:20:12,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-04-06 14:20:12,819 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 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 14:20:13,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:13,508 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2022-04-06 14:20:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:20:13,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 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 51 [2022-04-06 14:20:13,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:13,510 INFO L225 Difference]: With dead ends: 201 [2022-04-06 14:20:13,510 INFO L226 Difference]: Without dead ends: 195 [2022-04-06 14:20:13,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:20:13,514 INFO L913 BasicCegarLoop]: 102 mSDtfsCounter, 195 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:13,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 144 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:20:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-04-06 14:20:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 129. [2022-04-06 14:20:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.314516129032258) internal successors, (163), 124 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 167 transitions. [2022-04-06 14:20:13,575 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 167 transitions. Word has length 51 [2022-04-06 14:20:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:13,576 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 167 transitions. [2022-04-06 14:20:13,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 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 14:20:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 167 transitions. [2022-04-06 14:20:13,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 14:20:13,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:13,577 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:13,603 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 14:20:13,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 14:20:13,799 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:13,800 INFO L85 PathProgramCache]: Analyzing trace with hash -364118747, now seen corresponding path program 1 times [2022-04-06 14:20:13,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:13,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1137519677] [2022-04-06 14:20:13,801 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:13,801 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:13,801 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:13,801 INFO L85 PathProgramCache]: Analyzing trace with hash -364118747, now seen corresponding path program 2 times [2022-04-06 14:20:13,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:13,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967598172] [2022-04-06 14:20:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:13,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:14,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 14:20:14,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:14,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967598172] [2022-04-06 14:20:14,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967598172] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:14,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030435064] [2022-04-06 14:20:14,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:14,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:14,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:14,407 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 14:20:14,438 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 14:20:14,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:14,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:14,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 14:20:14,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:16,014 INFO L356 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2022-04-06 14:20:16,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 16 [2022-04-06 14:20:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 14:20:16,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:16,767 INFO L356 Elim1Store]: treesize reduction 330, result has 0.3 percent of original size [2022-04-06 14:20:16,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 140 treesize of output 1 [2022-04-06 14:20:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 14:20:16,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030435064] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:16,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:16,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 13] total 33 [2022-04-06 14:20:16,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:16,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1137519677] [2022-04-06 14:20:16,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1137519677] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:16,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:16,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:20:16,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049824084] [2022-04-06 14:20:16,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:16,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:20:16,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:16,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:20:16,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 14:20:16,801 INFO L87 Difference]: Start difference. First operand 129 states and 167 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 14:20:17,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:17,249 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2022-04-06 14:20:17,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:20:17,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 51 [2022-04-06 14:20:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:17,250 INFO L225 Difference]: With dead ends: 210 [2022-04-06 14:20:17,250 INFO L226 Difference]: Without dead ends: 141 [2022-04-06 14:20:17,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 14:20:17,251 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:17,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 50 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:20:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-04-06 14:20:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2022-04-06 14:20:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.2932330827067668) internal successors, (172), 133 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 176 transitions. [2022-04-06 14:20:17,319 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 176 transitions. Word has length 51 [2022-04-06 14:20:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:17,319 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 176 transitions. [2022-04-06 14:20:17,319 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 14:20:17,320 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 176 transitions. [2022-04-06 14:20:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 14:20:17,320 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:17,320 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:17,337 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 14:20:17,522 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:17,522 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:17,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash 247762981, now seen corresponding path program 1 times [2022-04-06 14:20:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:17,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [367440176] [2022-04-06 14:20:17,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:17,524 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:17,524 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:17,524 INFO L85 PathProgramCache]: Analyzing trace with hash 247762981, now seen corresponding path program 2 times [2022-04-06 14:20:17,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:17,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854257244] [2022-04-06 14:20:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:17,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:18,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 14:20:18,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:18,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854257244] [2022-04-06 14:20:18,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854257244] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:18,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517031145] [2022-04-06 14:20:18,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:18,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:18,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:18,688 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 14:20:18,693 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 14:20:18,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:18,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:18,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 14:20:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:22,186 INFO L356 Elim1Store]: treesize reduction 46, result has 33.3 percent of original size [2022-04-06 14:20:22,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 39 [2022-04-06 14:20:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 14:20:22,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:22,942 INFO L356 Elim1Store]: treesize reduction 330, result has 0.3 percent of original size [2022-04-06 14:20:22,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 139 treesize of output 1 [2022-04-06 14:20:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 14:20:22,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517031145] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:22,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:22,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 38 [2022-04-06 14:20:22,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:22,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [367440176] [2022-04-06 14:20:22,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [367440176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:22,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:22,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:20:22,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101615946] [2022-04-06 14:20:22,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:22,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:20:22,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:22,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:20:22,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:20:22,976 INFO L87 Difference]: Start difference. First operand 138 states and 176 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 14:20:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:23,716 INFO L93 Difference]: Finished difference Result 415 states and 547 transitions. [2022-04-06 14:20:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:20:23,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 51 [2022-04-06 14:20:23,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:23,718 INFO L225 Difference]: With dead ends: 415 [2022-04-06 14:20:23,718 INFO L226 Difference]: Without dead ends: 328 [2022-04-06 14:20:23,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=518, Invalid=1932, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 14:20:23,719 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 209 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:23,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 39 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:20:23,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-04-06 14:20:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 225. [2022-04-06 14:20:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.290909090909091) internal successors, (284), 220 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 288 transitions. [2022-04-06 14:20:23,826 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 288 transitions. Word has length 51 [2022-04-06 14:20:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:23,826 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 288 transitions. [2022-04-06 14:20:23,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 14:20:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 288 transitions. [2022-04-06 14:20:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 14:20:23,827 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:23,827 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:23,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:24,032 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 14:20:24,033 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:24,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash -732070043, now seen corresponding path program 1 times [2022-04-06 14:20:24,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:24,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [201738977] [2022-04-06 14:20:24,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:24,034 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:24,034 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:24,035 INFO L85 PathProgramCache]: Analyzing trace with hash -732070043, now seen corresponding path program 2 times [2022-04-06 14:20:24,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:24,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098921519] [2022-04-06 14:20:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:24,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:24,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 14:20:24,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:24,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098921519] [2022-04-06 14:20:24,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098921519] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:24,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417615491] [2022-04-06 14:20:24,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:24,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:24,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:24,762 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 14:20:24,763 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 14:20:24,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:24,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:24,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 14:20:24,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:25,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:20:25,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:20:25,104 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-04-06 14:20:25,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 13 [2022-04-06 14:20:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-06 14:20:25,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:25,382 INFO L356 Elim1Store]: treesize reduction 37, result has 75.5 percent of original size [2022-04-06 14:20:25,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 139 [2022-04-06 14:20:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 14:20:25,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417615491] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:25,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:25,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 25 [2022-04-06 14:20:25,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:25,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [201738977] [2022-04-06 14:20:25,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [201738977] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:25,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:25,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:20:25,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082445958] [2022-04-06 14:20:25,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:25,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:20:25,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:20:25,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-04-06 14:20:25,680 INFO L87 Difference]: Start difference. First operand 225 states and 288 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 14:20:26,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:26,102 INFO L93 Difference]: Finished difference Result 430 states and 557 transitions. [2022-04-06 14:20:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:20:26,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 51 [2022-04-06 14:20:26,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:26,104 INFO L225 Difference]: With dead ends: 430 [2022-04-06 14:20:26,104 INFO L226 Difference]: Without dead ends: 370 [2022-04-06 14:20:26,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 14:20:26,105 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 200 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:26,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 40 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:26,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-04-06 14:20:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 273. [2022-04-06 14:20:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.2835820895522387) internal successors, (344), 268 states have internal predecessors, (344), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 348 transitions. [2022-04-06 14:20:26,229 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 348 transitions. Word has length 51 [2022-04-06 14:20:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:26,229 INFO L478 AbstractCegarLoop]: Abstraction has 273 states and 348 transitions. [2022-04-06 14:20:26,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 14:20:26,229 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 348 transitions. [2022-04-06 14:20:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 14:20:26,230 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:26,230 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:26,245 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 14:20:26,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 14:20:26,433 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:26,433 INFO L85 PathProgramCache]: Analyzing trace with hash 169456873, now seen corresponding path program 3 times [2022-04-06 14:20:26,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:26,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [125646482] [2022-04-06 14:20:26,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:26,435 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:26,435 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:26,435 INFO L85 PathProgramCache]: Analyzing trace with hash 169456873, now seen corresponding path program 4 times [2022-04-06 14:20:26,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:26,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968168104] [2022-04-06 14:20:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:26,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:27,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 14:20:27,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:27,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968168104] [2022-04-06 14:20:27,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968168104] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:27,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689790713] [2022-04-06 14:20:27,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:27,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:27,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:27,242 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 14:20:27,244 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 14:20:27,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:27,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:27,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 14:20:27,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:27,707 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 14:20:27,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-04-06 14:20:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 14:20:27,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:28,010 INFO L356 Elim1Store]: treesize reduction 106, result has 29.8 percent of original size [2022-04-06 14:20:28,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 74 [2022-04-06 14:20:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 14:20:28,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689790713] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:28,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:28,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 32 [2022-04-06 14:20:28,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:28,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [125646482] [2022-04-06 14:20:28,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [125646482] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:28,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:28,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:20:28,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060551271] [2022-04-06 14:20:28,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:28,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:20:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:20:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-04-06 14:20:28,125 INFO L87 Difference]: Start difference. First operand 273 states and 348 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 14:20:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:29,490 INFO L93 Difference]: Finished difference Result 517 states and 670 transitions. [2022-04-06 14:20:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 14:20:29,490 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 51 [2022-04-06 14:20:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:29,492 INFO L225 Difference]: With dead ends: 517 [2022-04-06 14:20:29,492 INFO L226 Difference]: Without dead ends: 492 [2022-04-06 14:20:29,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=2083, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 14:20:29,493 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 248 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:29,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 55 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:20:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-04-06 14:20:29,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 282. [2022-04-06 14:20:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 1.2743682310469313) internal successors, (353), 277 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 357 transitions. [2022-04-06 14:20:29,644 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 357 transitions. Word has length 51 [2022-04-06 14:20:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:29,644 INFO L478 AbstractCegarLoop]: Abstraction has 282 states and 357 transitions. [2022-04-06 14:20:29,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 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 14:20:29,645 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 357 transitions. [2022-04-06 14:20:29,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 14:20:29,645 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:29,645 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:29,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 14:20:29,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:29,846 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:29,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:29,846 INFO L85 PathProgramCache]: Analyzing trace with hash -810376151, now seen corresponding path program 3 times [2022-04-06 14:20:29,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:29,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1946555979] [2022-04-06 14:20:29,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:29,847 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:29,848 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:29,848 INFO L85 PathProgramCache]: Analyzing trace with hash -810376151, now seen corresponding path program 4 times [2022-04-06 14:20:29,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:29,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018511681] [2022-04-06 14:20:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:29,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:30,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:30,752 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 14:20:30,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:30,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018511681] [2022-04-06 14:20:30,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018511681] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:30,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912269325] [2022-04-06 14:20:30,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:30,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:30,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:30,755 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 14:20:30,756 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 14:20:30,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:30,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:30,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 14:20:30,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:31,123 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:20:31,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 14:20:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 14:20:31,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:31,463 INFO L356 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2022-04-06 14:20:31,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-04-06 14:20:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 14:20:31,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912269325] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:31,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:31,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 30 [2022-04-06 14:20:31,768 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:31,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1946555979] [2022-04-06 14:20:31,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1946555979] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:31,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:31,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:20:31,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118593074] [2022-04-06 14:20:31,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:31,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:20:31,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:31,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:20:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2022-04-06 14:20:31,770 INFO L87 Difference]: Start difference. First operand 282 states and 357 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 14:20:32,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:32,551 INFO L93 Difference]: Finished difference Result 496 states and 630 transitions. [2022-04-06 14:20:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:20:32,552 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 51 [2022-04-06 14:20:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:32,553 INFO L225 Difference]: With dead ends: 496 [2022-04-06 14:20:32,553 INFO L226 Difference]: Without dead ends: 391 [2022-04-06 14:20:32,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=1362, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 14:20:32,554 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 146 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:32,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 65 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:20:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-04-06 14:20:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 311. [2022-04-06 14:20:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.2679738562091503) internal successors, (388), 306 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 392 transitions. [2022-04-06 14:20:32,719 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 392 transitions. Word has length 51 [2022-04-06 14:20:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:32,720 INFO L478 AbstractCegarLoop]: Abstraction has 311 states and 392 transitions. [2022-04-06 14:20:32,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 14:20:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 392 transitions. [2022-04-06 14:20:32,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 14:20:32,721 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:32,721 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:32,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-04-06 14:20:32,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:32,927 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:32,928 INFO L85 PathProgramCache]: Analyzing trace with hash -4715419, now seen corresponding path program 1 times [2022-04-06 14:20:32,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:32,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1162185989] [2022-04-06 14:20:32,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:32,929 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:32,929 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:32,929 INFO L85 PathProgramCache]: Analyzing trace with hash -4715419, now seen corresponding path program 2 times [2022-04-06 14:20:32,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:32,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722616006] [2022-04-06 14:20:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:32,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:33,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 14:20:33,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:33,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722616006] [2022-04-06 14:20:33,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722616006] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:33,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664489872] [2022-04-06 14:20:33,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:33,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:33,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:33,851 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 14:20:33,857 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 14:20:33,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:33,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:33,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 14:20:33,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:34,137 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 14:20:34,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-04-06 14:20:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 14:20:34,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:34,367 INFO L356 Elim1Store]: treesize reduction 44, result has 70.9 percent of original size [2022-04-06 14:20:34,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 136 [2022-04-06 14:20:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 14:20:34,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664489872] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:34,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:34,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 26 [2022-04-06 14:20:34,647 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:34,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1162185989] [2022-04-06 14:20:34,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1162185989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:34,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:34,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:20:34,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283734226] [2022-04-06 14:20:34,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:34,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:20:34,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:34,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:20:34,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:20:34,648 INFO L87 Difference]: Start difference. First operand 311 states and 392 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 14:20:35,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:35,708 INFO L93 Difference]: Finished difference Result 860 states and 1090 transitions. [2022-04-06 14:20:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:20:35,708 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have 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 14:20:35,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:35,710 INFO L225 Difference]: With dead ends: 860 [2022-04-06 14:20:35,710 INFO L226 Difference]: Without dead ends: 612 [2022-04-06 14:20:35,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=326, Invalid=1080, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:20:35,712 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 129 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:35,712 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 71 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:20:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-04-06 14:20:35,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 439. [2022-04-06 14:20:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 434 states have (on average 1.2695852534562213) internal successors, (551), 434 states have internal predecessors, (551), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 555 transitions. [2022-04-06 14:20:35,956 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 555 transitions. Word has length 51 [2022-04-06 14:20:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:35,957 INFO L478 AbstractCegarLoop]: Abstraction has 439 states and 555 transitions. [2022-04-06 14:20:35,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:35,957 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 555 transitions. [2022-04-06 14:20:35,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 14:20:35,958 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:35,958 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:35,974 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 14:20:36,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:36,160 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:36,160 INFO L85 PathProgramCache]: Analyzing trace with hash -889993238, now seen corresponding path program 3 times [2022-04-06 14:20:36,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:36,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2011708263] [2022-04-06 14:20:36,161 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:36,161 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:36,161 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash -889993238, now seen corresponding path program 4 times [2022-04-06 14:20:36,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:36,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852279185] [2022-04-06 14:20:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:36,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:36,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 14:20:36,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:36,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852279185] [2022-04-06 14:20:36,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852279185] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:36,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395726038] [2022-04-06 14:20:36,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:36,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:36,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:36,280 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 14:20:36,304 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 14:20:36,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:36,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:36,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 14:20:36,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 14:20:36,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 14:20:36,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395726038] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:36,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:36,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 22 [2022-04-06 14:20:36,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:36,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2011708263] [2022-04-06 14:20:36,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2011708263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:36,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:36,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:20:36,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429616566] [2022-04-06 14:20:36,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:36,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:20:36,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:36,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:20:36,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-04-06 14:20:36,760 INFO L87 Difference]: Start difference. First operand 439 states and 555 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 14:20:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:37,577 INFO L93 Difference]: Finished difference Result 1058 states and 1330 transitions. [2022-04-06 14:20:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:20:37,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 53 [2022-04-06 14:20:37,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:37,581 INFO L225 Difference]: With dead ends: 1058 [2022-04-06 14:20:37,581 INFO L226 Difference]: Without dead ends: 967 [2022-04-06 14:20:37,582 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:20:37,582 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 187 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:37,583 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 64 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:20:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-04-06 14:20:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 472. [2022-04-06 14:20:37,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 467 states have (on average 1.265524625267666) internal successors, (591), 467 states have internal predecessors, (591), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 595 transitions. [2022-04-06 14:20:37,851 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 595 transitions. Word has length 53 [2022-04-06 14:20:37,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:37,851 INFO L478 AbstractCegarLoop]: Abstraction has 472 states and 595 transitions. [2022-04-06 14:20:37,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 14:20:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 595 transitions. [2022-04-06 14:20:37,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 14:20:37,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:37,853 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:37,877 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 14:20:38,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 14:20:38,067 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:38,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:38,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2072849753, now seen corresponding path program 1 times [2022-04-06 14:20:38,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:38,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [309922934] [2022-04-06 14:20:38,068 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:38,068 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:38,068 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:38,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2072849753, now seen corresponding path program 2 times [2022-04-06 14:20:38,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:38,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189599573] [2022-04-06 14:20:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:38,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-04-06 14:20:38,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:38,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189599573] [2022-04-06 14:20:38,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189599573] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:38,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781814076] [2022-04-06 14:20:38,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:38,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:38,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:38,136 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 14:20:38,164 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 14:20:38,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:38,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:38,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 14:20:38,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 14:20:38,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-04-06 14:20:38,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781814076] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:38,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:38,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 12 [2022-04-06 14:20:38,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:38,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [309922934] [2022-04-06 14:20:38,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [309922934] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:38,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:38,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:20:38,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270637644] [2022-04-06 14:20:38,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:38,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:20:38,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:20:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:20:38,435 INFO L87 Difference]: Start difference. First operand 472 states and 595 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 14:20:38,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:38,811 INFO L93 Difference]: Finished difference Result 846 states and 1066 transitions. [2022-04-06 14:20:38,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:20:38,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 54 [2022-04-06 14:20:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:38,814 INFO L225 Difference]: With dead ends: 846 [2022-04-06 14:20:38,814 INFO L226 Difference]: Without dead ends: 447 [2022-04-06 14:20:38,815 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-04-06 14:20:38,815 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:38,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 53 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-04-06 14:20:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 412. [2022-04-06 14:20:39,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 407 states have (on average 1.1891891891891893) internal successors, (484), 407 states have internal predecessors, (484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 488 transitions. [2022-04-06 14:20:39,056 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 488 transitions. Word has length 54 [2022-04-06 14:20:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:39,057 INFO L478 AbstractCegarLoop]: Abstraction has 412 states and 488 transitions. [2022-04-06 14:20:39,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 14:20:39,058 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 488 transitions. [2022-04-06 14:20:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 14:20:39,059 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:39,059 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:39,081 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 14:20:39,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 14:20:39,274 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:39,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash 258092167, now seen corresponding path program 1 times [2022-04-06 14:20:39,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:39,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [198888046] [2022-04-06 14:20:39,276 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:39,276 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:39,276 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:39,276 INFO L85 PathProgramCache]: Analyzing trace with hash 258092167, now seen corresponding path program 2 times [2022-04-06 14:20:39,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:39,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568420650] [2022-04-06 14:20:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:39,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:39,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:39,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 14:20:39,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:39,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568420650] [2022-04-06 14:20:39,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568420650] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:39,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199487394] [2022-04-06 14:20:39,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:39,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:39,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:39,419 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 14:20:39,449 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 14:20:39,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:39,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:39,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 14:20:39,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:39,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-06 14:20:39,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:40,055 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:20:40,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:20:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 14:20:40,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199487394] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:40,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:40,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 28 [2022-04-06 14:20:40,120 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [198888046] [2022-04-06 14:20:40,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [198888046] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:40,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:40,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:20:40,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135779550] [2022-04-06 14:20:40,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:40,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:20:40,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:40,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:20:40,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:20:40,121 INFO L87 Difference]: Start difference. First operand 412 states and 488 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:42,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:42,051 INFO L93 Difference]: Finished difference Result 1951 states and 2324 transitions. [2022-04-06 14:20:42,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:20:42,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 14:20:42,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:42,057 INFO L225 Difference]: With dead ends: 1951 [2022-04-06 14:20:42,057 INFO L226 Difference]: Without dead ends: 1922 [2022-04-06 14:20:42,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 14:20:42,058 INFO L913 BasicCegarLoop]: 142 mSDtfsCounter, 273 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:42,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 189 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:20:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2022-04-06 14:20:42,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 414. [2022-04-06 14:20:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 409 states have (on average 1.1907090464547678) internal successors, (487), 409 states have internal predecessors, (487), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 491 transitions. [2022-04-06 14:20:42,347 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 491 transitions. Word has length 54 [2022-04-06 14:20:42,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:42,347 INFO L478 AbstractCegarLoop]: Abstraction has 414 states and 491 transitions. [2022-04-06 14:20:42,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:42,347 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 491 transitions. [2022-04-06 14:20:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 14:20:42,348 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:42,348 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:42,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:42,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:42,567 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:42,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1238452689, now seen corresponding path program 5 times [2022-04-06 14:20:42,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:42,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1882907826] [2022-04-06 14:20:42,569 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:42,569 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:42,569 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:42,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1238452689, now seen corresponding path program 6 times [2022-04-06 14:20:42,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:42,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240318180] [2022-04-06 14:20:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:42,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:42,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 14:20:42,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:42,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240318180] [2022-04-06 14:20:42,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240318180] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:42,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128154547] [2022-04-06 14:20:42,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:20:42,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:42,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:42,702 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 14:20:42,703 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 14:20:42,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 14:20:42,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:42,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 14:20:42,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:43,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 14:20:43,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:43,546 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:20:43,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:20:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-04-06 14:20:43,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128154547] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:43,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:43,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 28 [2022-04-06 14:20:43,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:43,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1882907826] [2022-04-06 14:20:43,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1882907826] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:43,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:43,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:20:43,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920718268] [2022-04-06 14:20:43,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:43,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:20:43,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:20:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:20:43,611 INFO L87 Difference]: Start difference. First operand 414 states and 491 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 14:20:44,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:44,689 INFO L93 Difference]: Finished difference Result 1157 states and 1362 transitions. [2022-04-06 14:20:44,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:20:44,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 55 [2022-04-06 14:20:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:44,692 INFO L225 Difference]: With dead ends: 1157 [2022-04-06 14:20:44,692 INFO L226 Difference]: Without dead ends: 1108 [2022-04-06 14:20:44,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 14:20:44,693 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 217 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:44,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 90 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:20:44,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2022-04-06 14:20:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 414. [2022-04-06 14:20:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 409 states have (on average 1.1907090464547678) internal successors, (487), 409 states have internal predecessors, (487), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 491 transitions. [2022-04-06 14:20:45,041 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 491 transitions. Word has length 55 [2022-04-06 14:20:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:45,041 INFO L478 AbstractCegarLoop]: Abstraction has 414 states and 491 transitions. [2022-04-06 14:20:45,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 14:20:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 491 transitions. [2022-04-06 14:20:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 14:20:45,042 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:45,042 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:45,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:45,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:45,261 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1954216222, now seen corresponding path program 3 times [2022-04-06 14:20:45,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:45,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [124572002] [2022-04-06 14:20:45,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:45,263 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:45,263 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:45,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1954216222, now seen corresponding path program 4 times [2022-04-06 14:20:45,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:45,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944589207] [2022-04-06 14:20:45,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:45,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:45,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 14:20:45,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:45,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944589207] [2022-04-06 14:20:45,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944589207] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:45,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995608485] [2022-04-06 14:20:45,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:45,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:45,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:45,435 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 14:20:45,464 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 14:20:45,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:45,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:45,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 14:20:45,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:45,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:20:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 14:20:45,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:46,204 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:20:46,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:20:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 14:20:46,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995608485] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:46,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:46,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 34 [2022-04-06 14:20:46,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:46,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [124572002] [2022-04-06 14:20:46,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [124572002] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:46,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:46,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:20:46,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615003640] [2022-04-06 14:20:46,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:46,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:20:46,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:46,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:20:46,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:20:46,272 INFO L87 Difference]: Start difference. First operand 414 states and 491 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:48,936 INFO L93 Difference]: Finished difference Result 2463 states and 2933 transitions. [2022-04-06 14:20:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:20:48,937 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 14:20:48,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:48,943 INFO L225 Difference]: With dead ends: 2463 [2022-04-06 14:20:48,943 INFO L226 Difference]: Without dead ends: 2434 [2022-04-06 14:20:48,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=1882, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 14:20:48,944 INFO L913 BasicCegarLoop]: 161 mSDtfsCounter, 372 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:48,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 218 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 14:20:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2022-04-06 14:20:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 418. [2022-04-06 14:20:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 1.1937046004842615) internal successors, (493), 413 states have internal predecessors, (493), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 497 transitions. [2022-04-06 14:20:49,257 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 497 transitions. Word has length 56 [2022-04-06 14:20:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:49,257 INFO L478 AbstractCegarLoop]: Abstraction has 418 states and 497 transitions. [2022-04-06 14:20:49,257 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 497 transitions. [2022-04-06 14:20:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 14:20:49,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:49,258 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:49,274 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 14:20:49,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 14:20:49,458 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:49,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1100536012, now seen corresponding path program 7 times [2022-04-06 14:20:49,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:49,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1440636625] [2022-04-06 14:20:49,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:49,460 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:49,460 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:49,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1100536012, now seen corresponding path program 8 times [2022-04-06 14:20:49,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:49,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804371210] [2022-04-06 14:20:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:49,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:49,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 14:20:49,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:49,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804371210] [2022-04-06 14:20:49,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804371210] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:49,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555182347] [2022-04-06 14:20:49,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:20:49,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:49,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:49,591 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 14:20:49,608 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 14:20:49,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:20:49,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:49,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 14:20:49,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:49,933 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 14:20:49,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-04-06 14:20:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 14:20:49,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:50,192 INFO L356 Elim1Store]: treesize reduction 44, result has 70.9 percent of original size [2022-04-06 14:20:50,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 136 [2022-04-06 14:20:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 14:20:50,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555182347] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:50,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:50,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2022-04-06 14:20:50,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:50,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1440636625] [2022-04-06 14:20:50,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1440636625] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:50,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:50,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:20:50,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252401041] [2022-04-06 14:20:50,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:50,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:20:50,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:50,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:20:50,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-04-06 14:20:50,446 INFO L87 Difference]: Start difference. First operand 418 states and 497 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:51,879 INFO L93 Difference]: Finished difference Result 1406 states and 1660 transitions. [2022-04-06 14:20:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:20:51,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 14:20:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:51,883 INFO L225 Difference]: With dead ends: 1406 [2022-04-06 14:20:51,883 INFO L226 Difference]: Without dead ends: 1357 [2022-04-06 14:20:51,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 14:20:51,883 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 252 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:51,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 114 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:20:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-04-06 14:20:52,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 418. [2022-04-06 14:20:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 1.1937046004842615) internal successors, (493), 413 states have internal predecessors, (493), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 497 transitions. [2022-04-06 14:20:52,164 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 497 transitions. Word has length 57 [2022-04-06 14:20:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:52,164 INFO L478 AbstractCegarLoop]: Abstraction has 418 states and 497 transitions. [2022-04-06 14:20:52,164 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 497 transitions. [2022-04-06 14:20:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 14:20:52,165 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:52,165 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:52,181 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 14:20:52,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 14:20:52,366 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:52,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1706595591, now seen corresponding path program 9 times [2022-04-06 14:20:52,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:52,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [909415130] [2022-04-06 14:20:52,367 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:52,367 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:52,367 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:52,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1706595591, now seen corresponding path program 10 times [2022-04-06 14:20:52,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:52,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206231775] [2022-04-06 14:20:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:52,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 14:20:52,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:52,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206231775] [2022-04-06 14:20:52,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206231775] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:52,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922017774] [2022-04-06 14:20:52,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:52,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:52,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:52,519 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 14:20:52,550 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 14:20:52,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:52,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:52,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 14:20:52,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:53,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:20:53,109 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-04-06 14:20:53,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 18 [2022-04-06 14:20:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-04-06 14:20:53,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:53,590 INFO L356 Elim1Store]: treesize reduction 44, result has 70.9 percent of original size [2022-04-06 14:20:53,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 136 [2022-04-06 14:20:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 14:20:54,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922017774] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:54,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:54,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 32 [2022-04-06 14:20:54,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:54,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [909415130] [2022-04-06 14:20:54,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [909415130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:54,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:54,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:20:54,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429799261] [2022-04-06 14:20:54,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:54,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:20:54,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:54,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:20:54,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-04-06 14:20:54,002 INFO L87 Difference]: Start difference. First operand 418 states and 497 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 14:20:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:55,930 INFO L93 Difference]: Finished difference Result 1651 states and 1952 transitions. [2022-04-06 14:20:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:20:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 14:20:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:55,935 INFO L225 Difference]: With dead ends: 1651 [2022-04-06 14:20:55,935 INFO L226 Difference]: Without dead ends: 1602 [2022-04-06 14:20:55,936 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 14:20:55,936 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 278 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:55,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 136 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:20:55,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2022-04-06 14:20:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 418. [2022-04-06 14:20:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 1.1937046004842615) internal successors, (493), 413 states have internal predecessors, (493), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 497 transitions. [2022-04-06 14:20:56,236 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 497 transitions. Word has length 59 [2022-04-06 14:20:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:56,236 INFO L478 AbstractCegarLoop]: Abstraction has 418 states and 497 transitions. [2022-04-06 14:20:56,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 14:20:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 497 transitions. [2022-04-06 14:20:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 14:20:56,237 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:56,237 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:56,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 14:20:56,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 14:20:56,446 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1813405083, now seen corresponding path program 3 times [2022-04-06 14:20:56,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:56,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [763301360] [2022-04-06 14:20:56,448 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:56,448 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:56,448 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:56,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1813405083, now seen corresponding path program 4 times [2022-04-06 14:20:56,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:56,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820353164] [2022-04-06 14:20:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:56,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:56,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 14:20:56,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:56,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820353164] [2022-04-06 14:20:56,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820353164] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:56,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24840044] [2022-04-06 14:20:56,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:20:56,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:56,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:56,548 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 14:20:56,555 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 14:20:56,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:20:56,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 14:20:56,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-04-06 14:20:56,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 14:20:56,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24840044] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:20:56,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:20:56,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2022-04-06 14:20:56,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:56,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [763301360] [2022-04-06 14:20:56,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [763301360] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:56,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:56,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:20:56,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097891459] [2022-04-06 14:20:56,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:56,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:20:56,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:56,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:20:56,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-06 14:20:56,915 INFO L87 Difference]: Start difference. First operand 418 states and 497 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 14:20:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:57,397 INFO L93 Difference]: Finished difference Result 581 states and 679 transitions. [2022-04-06 14:20:57,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:20:57,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 60 [2022-04-06 14:20:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:57,399 INFO L225 Difference]: With dead ends: 581 [2022-04-06 14:20:57,399 INFO L226 Difference]: Without dead ends: 389 [2022-04-06 14:20:57,399 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-04-06 14:20:57,400 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 89 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:57,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 57 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:20:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-04-06 14:20:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 330. [2022-04-06 14:20:57,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 325 states have (on average 1.1938461538461538) internal successors, (388), 325 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 392 transitions. [2022-04-06 14:20:57,651 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 392 transitions. Word has length 60 [2022-04-06 14:20:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:57,651 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 392 transitions. [2022-04-06 14:20:57,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 14:20:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 392 transitions. [2022-04-06 14:20:57,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 14:20:57,652 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:57,653 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:57,669 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 14:20:57,854 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 14:20:57,854 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:57,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:57,854 INFO L85 PathProgramCache]: Analyzing trace with hash 713223000, now seen corresponding path program 5 times [2022-04-06 14:20:57,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:57,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [953481541] [2022-04-06 14:20:57,855 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:57,856 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:57,856 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:57,856 INFO L85 PathProgramCache]: Analyzing trace with hash 713223000, now seen corresponding path program 6 times [2022-04-06 14:20:57,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:57,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407842691] [2022-04-06 14:20:57,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:57,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:58,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:20:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:20:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 14:20:58,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:20:58,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407842691] [2022-04-06 14:20:58,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407842691] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:58,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955404241] [2022-04-06 14:20:58,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:20:58,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:58,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:20:58,060 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 14:20:58,064 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 14:20:58,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 14:20:58,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:20:58,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 14:20:58,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:20:58,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:20:58,540 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:20:58,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-04-06 14:20:58,576 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-04-06 14:20:58,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:20:58,737 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-04-06 14:20:58,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2022-04-06 14:20:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 14:20:58,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955404241] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 14:20:58,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:20:58,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16, 10] total 29 [2022-04-06 14:20:58,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:20:58,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [953481541] [2022-04-06 14:20:58,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [953481541] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:20:58,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:20:58,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:20:58,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39916736] [2022-04-06 14:20:58,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:20:58,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:20:58,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:58,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:20:58,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-04-06 14:20:58,775 INFO L87 Difference]: Start difference. First operand 330 states and 392 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 14:20:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:20:59,130 INFO L93 Difference]: Finished difference Result 381 states and 447 transitions. [2022-04-06 14:20:59,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:20:59,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 60 [2022-04-06 14:20:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:20:59,132 INFO L225 Difference]: With dead ends: 381 [2022-04-06 14:20:59,132 INFO L226 Difference]: Without dead ends: 350 [2022-04-06 14:20:59,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-04-06 14:20:59,132 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 28 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:20:59,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 116 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:20:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-04-06 14:20:59,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 319. [2022-04-06 14:20:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.1847133757961783) internal successors, (372), 314 states have internal predecessors, (372), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:20:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 376 transitions. [2022-04-06 14:20:59,372 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 376 transitions. Word has length 60 [2022-04-06 14:20:59,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:20:59,372 INFO L478 AbstractCegarLoop]: Abstraction has 319 states and 376 transitions. [2022-04-06 14:20:59,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 14:20:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 376 transitions. [2022-04-06 14:20:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 14:20:59,373 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:20:59,373 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:20:59,395 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 14:20:59,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:20:59,587 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:20:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:20:59,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1971018387, now seen corresponding path program 5 times [2022-04-06 14:20:59,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:20:59,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [628968660] [2022-04-06 14:20:59,589 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:20:59,589 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:20:59,589 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:20:59,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1971018387, now seen corresponding path program 6 times [2022-04-06 14:20:59,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:20:59,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106282080] [2022-04-06 14:20:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:20:59,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:20:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:00,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 14:21:00,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:00,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106282080] [2022-04-06 14:21:00,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106282080] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:00,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441511862] [2022-04-06 14:21:00,189 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:21:00,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:00,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:00,190 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 14:21:00,190 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 14:21:00,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:21:00,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:00,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 14:21:00,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:00,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:21:00,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:21:00,491 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:21:00,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 27 [2022-04-06 14:21:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 14:21:00,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:00,770 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:21:00,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2022-04-06 14:21:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 14:21:00,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441511862] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:00,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:00,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 26 [2022-04-06 14:21:00,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:00,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [628968660] [2022-04-06 14:21:00,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [628968660] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:00,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:00,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:21:00,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233213018] [2022-04-06 14:21:00,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:00,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:21:00,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:00,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:21:00,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:21:00,842 INFO L87 Difference]: Start difference. First operand 319 states and 376 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 14:21:01,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:01,500 INFO L93 Difference]: Finished difference Result 368 states and 429 transitions. [2022-04-06 14:21:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:21:01,500 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 14:21:01,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:01,501 INFO L225 Difference]: With dead ends: 368 [2022-04-06 14:21:01,501 INFO L226 Difference]: Without dead ends: 292 [2022-04-06 14:21:01,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 14:21:01,502 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 118 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:01,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 46 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-04-06 14:21:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2022-04-06 14:21:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 287 states have (on average 1.1916376306620209) internal successors, (342), 287 states have internal predecessors, (342), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 346 transitions. [2022-04-06 14:21:01,726 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 346 transitions. Word has length 61 [2022-04-06 14:21:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:01,726 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 346 transitions. [2022-04-06 14:21:01,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 14:21:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 346 transitions. [2022-04-06 14:21:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 14:21:01,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:01,727 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:01,754 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 14:21:01,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:01,951 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:01,952 INFO L85 PathProgramCache]: Analyzing trace with hash -14298754, now seen corresponding path program 11 times [2022-04-06 14:21:01,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:01,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [767438254] [2022-04-06 14:21:01,953 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:01,953 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:01,953 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:01,953 INFO L85 PathProgramCache]: Analyzing trace with hash -14298754, now seen corresponding path program 12 times [2022-04-06 14:21:01,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:01,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588010359] [2022-04-06 14:21:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:01,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:02,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 14:21:02,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:02,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588010359] [2022-04-06 14:21:02,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588010359] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:02,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798757013] [2022-04-06 14:21:02,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:21:02,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:02,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:02,098 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 14:21:02,100 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 14:21:02,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:21:02,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:02,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 14:21:02,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:02,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:21:02,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-04-06 14:21:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 14:21:02,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 14:21:02,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798757013] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:02,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:02,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-04-06 14:21:02,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:02,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [767438254] [2022-04-06 14:21:02,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [767438254] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:02,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:02,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:21:02,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596343767] [2022-04-06 14:21:02,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:02,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:21:02,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:02,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:21:02,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 14:21:02,933 INFO L87 Difference]: Start difference. First operand 292 states and 346 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 14:21:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:04,993 INFO L93 Difference]: Finished difference Result 1680 states and 1993 transitions. [2022-04-06 14:21:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:21:04,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 14:21:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:04,998 INFO L225 Difference]: With dead ends: 1680 [2022-04-06 14:21:04,998 INFO L226 Difference]: Without dead ends: 1631 [2022-04-06 14:21:04,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=1652, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 14:21:04,999 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 270 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:04,999 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 146 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:21:05,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2022-04-06 14:21:05,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 294. [2022-04-06 14:21:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 289 states have (on average 1.193771626297578) internal successors, (345), 289 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 349 transitions. [2022-04-06 14:21:05,246 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 349 transitions. Word has length 61 [2022-04-06 14:21:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:05,247 INFO L478 AbstractCegarLoop]: Abstraction has 294 states and 349 transitions. [2022-04-06 14:21:05,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 14:21:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 349 transitions. [2022-04-06 14:21:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 14:21:05,248 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:05,248 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:05,264 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 14:21:05,448 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 14:21:05,448 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash -891810688, now seen corresponding path program 7 times [2022-04-06 14:21:05,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:05,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [944633335] [2022-04-06 14:21:05,451 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:05,451 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:05,451 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:05,451 INFO L85 PathProgramCache]: Analyzing trace with hash -891810688, now seen corresponding path program 8 times [2022-04-06 14:21:05,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:05,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744561333] [2022-04-06 14:21:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:05,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:06,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 14:21:06,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:06,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744561333] [2022-04-06 14:21:06,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744561333] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:06,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444892629] [2022-04-06 14:21:06,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:21:06,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:06,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:06,626 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 14:21:06,628 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 14:21:06,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:21:06,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:06,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 14:21:06,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:07,241 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-04-06 14:21:07,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 14 [2022-04-06 14:21:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 14:21:07,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:07,931 INFO L356 Elim1Store]: treesize reduction 77, result has 65.0 percent of original size [2022-04-06 14:21:07,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 85 treesize of output 176 [2022-04-06 14:21:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-04-06 14:21:08,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444892629] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:08,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:08,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 17] total 52 [2022-04-06 14:21:08,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:08,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [944633335] [2022-04-06 14:21:08,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [944633335] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:08,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:08,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 14:21:08,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452711218] [2022-04-06 14:21:08,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:08,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 14:21:08,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:08,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 14:21:08,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2322, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:21:08,413 INFO L87 Difference]: Start difference. First operand 294 states and 349 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 14:21:11,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:11,243 INFO L93 Difference]: Finished difference Result 849 states and 999 transitions. [2022-04-06 14:21:11,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 14:21:11,243 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 62 [2022-04-06 14:21:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:11,245 INFO L225 Difference]: With dead ends: 849 [2022-04-06 14:21:11,245 INFO L226 Difference]: Without dead ends: 844 [2022-04-06 14:21:11,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=800, Invalid=4602, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 14:21:11,247 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 301 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:11,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 72 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:21:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-04-06 14:21:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 442. [2022-04-06 14:21:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 437 states have (on average 1.194508009153318) internal successors, (522), 437 states have internal predecessors, (522), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 526 transitions. [2022-04-06 14:21:11,690 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 526 transitions. Word has length 62 [2022-04-06 14:21:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:11,690 INFO L478 AbstractCegarLoop]: Abstraction has 442 states and 526 transitions. [2022-04-06 14:21:11,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 14:21:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 526 transitions. [2022-04-06 14:21:11,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 14:21:11,691 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:11,691 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:11,716 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 14:21:11,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:11,916 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:11,916 INFO L85 PathProgramCache]: Analyzing trace with hash -970116796, now seen corresponding path program 9 times [2022-04-06 14:21:11,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:11,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1247157840] [2022-04-06 14:21:11,917 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:11,917 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:11,917 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:11,917 INFO L85 PathProgramCache]: Analyzing trace with hash -970116796, now seen corresponding path program 10 times [2022-04-06 14:21:11,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:11,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834453435] [2022-04-06 14:21:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:11,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:13,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 14:21:13,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:13,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834453435] [2022-04-06 14:21:13,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834453435] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:13,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947928978] [2022-04-06 14:21:13,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:21:13,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:13,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:13,108 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 14:21:13,109 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 14:21:13,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:21:13,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 14:21:13,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:13,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:21:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 14:21:13,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:13,841 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:21:13,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:21:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 14:21:13,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947928978] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:13,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:13,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 9] total 38 [2022-04-06 14:21:13,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:13,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1247157840] [2022-04-06 14:21:13,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1247157840] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:13,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:13,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 14:21:13,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949780454] [2022-04-06 14:21:13,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:13,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 14:21:13,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:13,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 14:21:13,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:21:13,924 INFO L87 Difference]: Start difference. First operand 442 states and 526 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 14:21:16,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:16,637 INFO L93 Difference]: Finished difference Result 1209 states and 1430 transitions. [2022-04-06 14:21:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 14:21:16,637 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 62 [2022-04-06 14:21:16,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:16,639 INFO L225 Difference]: With dead ends: 1209 [2022-04-06 14:21:16,639 INFO L226 Difference]: Without dead ends: 981 [2022-04-06 14:21:16,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=543, Invalid=2879, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 14:21:16,641 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 257 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:16,641 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 103 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:21:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-04-06 14:21:17,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 548. [2022-04-06 14:21:17,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 543 states have (on average 1.1860036832412524) internal successors, (644), 543 states have internal predecessors, (644), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 648 transitions. [2022-04-06 14:21:17,147 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 648 transitions. Word has length 62 [2022-04-06 14:21:17,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:17,148 INFO L478 AbstractCegarLoop]: Abstraction has 548 states and 648 transitions. [2022-04-06 14:21:17,148 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 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 14:21:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 648 transitions. [2022-04-06 14:21:17,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 14:21:17,149 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:17,149 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:17,168 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 14:21:17,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:17,357 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:17,358 INFO L85 PathProgramCache]: Analyzing trace with hash 263794432, now seen corresponding path program 11 times [2022-04-06 14:21:17,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:17,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [579921948] [2022-04-06 14:21:17,359 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:17,359 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:17,359 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:17,359 INFO L85 PathProgramCache]: Analyzing trace with hash 263794432, now seen corresponding path program 12 times [2022-04-06 14:21:17,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:17,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242716316] [2022-04-06 14:21:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:17,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:18,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 14:21:18,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:18,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242716316] [2022-04-06 14:21:18,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242716316] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:18,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501179660] [2022-04-06 14:21:18,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:21:18,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:18,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:18,196 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 14:21:18,223 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 14:21:18,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:21:18,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:18,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 14:21:18,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:18,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:21:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 14:21:18,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:19,039 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:21:19,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:21:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 14:21:19,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501179660] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:19,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:19,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 11] total 38 [2022-04-06 14:21:19,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:19,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [579921948] [2022-04-06 14:21:19,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [579921948] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:19,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:19,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 14:21:19,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577628229] [2022-04-06 14:21:19,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:19,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 14:21:19,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 14:21:19,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:21:19,122 INFO L87 Difference]: Start difference. First operand 548 states and 648 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 14:21:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:21,222 INFO L93 Difference]: Finished difference Result 1084 states and 1270 transitions. [2022-04-06 14:21:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 14:21:21,223 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 62 [2022-04-06 14:21:21,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:21,226 INFO L225 Difference]: With dead ends: 1084 [2022-04-06 14:21:21,226 INFO L226 Difference]: Without dead ends: 1079 [2022-04-06 14:21:21,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=445, Invalid=2311, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 14:21:21,228 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 318 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:21,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 81 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:21:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2022-04-06 14:21:21,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 632. [2022-04-06 14:21:21,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 627 states have (on average 1.1945773524720893) internal successors, (749), 627 states have internal predecessors, (749), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 753 transitions. [2022-04-06 14:21:21,820 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 753 transitions. Word has length 62 [2022-04-06 14:21:21,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:21,820 INFO L478 AbstractCegarLoop]: Abstraction has 632 states and 753 transitions. [2022-04-06 14:21:21,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 14:21:21,820 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 753 transitions. [2022-04-06 14:21:21,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 14:21:21,822 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:21,822 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:21,839 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 14:21:22,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 14:21:22,026 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:22,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:22,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1299721920, now seen corresponding path program 13 times [2022-04-06 14:21:22,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:22,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [273833316] [2022-04-06 14:21:22,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:22,027 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:22,027 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:22,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1299721920, now seen corresponding path program 14 times [2022-04-06 14:21:22,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:22,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138056479] [2022-04-06 14:21:22,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:22,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:22,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 14:21:22,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:22,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138056479] [2022-04-06 14:21:22,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138056479] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:22,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650916151] [2022-04-06 14:21:22,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:21:22,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:22,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:22,357 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 14:21:22,357 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 14:21:22,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:21:22,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:22,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 14:21:22,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:22,777 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 14:21:22,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-04-06 14:21:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 14:21:22,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:23,038 INFO L356 Elim1Store]: treesize reduction 44, result has 70.9 percent of original size [2022-04-06 14:21:23,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 136 [2022-04-06 14:21:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-04-06 14:21:23,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650916151] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:23,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:23,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-04-06 14:21:23,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:23,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [273833316] [2022-04-06 14:21:23,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [273833316] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:23,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:23,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:21:23,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149688159] [2022-04-06 14:21:23,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:23,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:21:23,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:23,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:21:23,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-04-06 14:21:23,287 INFO L87 Difference]: Start difference. First operand 632 states and 753 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:24,325 INFO L93 Difference]: Finished difference Result 779 states and 919 transitions. [2022-04-06 14:21:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:21:24,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 14:21:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:24,327 INFO L225 Difference]: With dead ends: 779 [2022-04-06 14:21:24,328 INFO L226 Difference]: Without dead ends: 774 [2022-04-06 14:21:24,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 14:21:24,328 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 147 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:24,329 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 58 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:24,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-04-06 14:21:24,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 400. [2022-04-06 14:21:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.179746835443038) internal successors, (466), 395 states have internal predecessors, (466), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:24,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 470 transitions. [2022-04-06 14:21:24,743 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 470 transitions. Word has length 62 [2022-04-06 14:21:24,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:24,743 INFO L478 AbstractCegarLoop]: Abstraction has 400 states and 470 transitions. [2022-04-06 14:21:24,743 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 470 transitions. [2022-04-06 14:21:24,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 14:21:24,744 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:24,744 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:24,770 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 14:21:24,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 14:21:24,959 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:24,960 INFO L85 PathProgramCache]: Analyzing trace with hash 930201970, now seen corresponding path program 13 times [2022-04-06 14:21:24,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:24,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1395971427] [2022-04-06 14:21:24,961 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:24,961 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:24,961 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:24,961 INFO L85 PathProgramCache]: Analyzing trace with hash 930201970, now seen corresponding path program 14 times [2022-04-06 14:21:24,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:24,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805799409] [2022-04-06 14:21:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:24,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:26,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 14:21:26,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:26,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805799409] [2022-04-06 14:21:26,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805799409] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:26,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647340625] [2022-04-06 14:21:26,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:21:26,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:26,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:26,041 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 14:21:26,042 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 14:21:26,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:21:26,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:26,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 14:21:26,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:26,578 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:21:26,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 14:21:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 14:21:26,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:26,958 INFO L356 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2022-04-06 14:21:26,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-04-06 14:21:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 14:21:27,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647340625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:27,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:27,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 11] total 34 [2022-04-06 14:21:27,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:27,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1395971427] [2022-04-06 14:21:27,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1395971427] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:27,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:27,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 14:21:27,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780730896] [2022-04-06 14:21:27,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:27,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 14:21:27,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 14:21:27,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:21:27,298 INFO L87 Difference]: Start difference. First operand 400 states and 470 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 14:21:29,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:29,297 INFO L93 Difference]: Finished difference Result 1132 states and 1326 transitions. [2022-04-06 14:21:29,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 14:21:29,297 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 72 [2022-04-06 14:21:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:29,299 INFO L225 Difference]: With dead ends: 1132 [2022-04-06 14:21:29,299 INFO L226 Difference]: Without dead ends: 938 [2022-04-06 14:21:29,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 14:21:29,300 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 275 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:29,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 64 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:21:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-04-06 14:21:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 524. [2022-04-06 14:21:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 519 states have (on average 1.1560693641618498) internal successors, (600), 519 states have internal predecessors, (600), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 604 transitions. [2022-04-06 14:21:29,861 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 604 transitions. Word has length 72 [2022-04-06 14:21:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:29,861 INFO L478 AbstractCegarLoop]: Abstraction has 524 states and 604 transitions. [2022-04-06 14:21:29,861 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 14:21:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 604 transitions. [2022-04-06 14:21:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 14:21:29,862 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:29,862 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:29,885 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 14:21:30,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 14:21:30,083 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash -188563146, now seen corresponding path program 15 times [2022-04-06 14:21:30,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:30,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1634181444] [2022-04-06 14:21:30,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:30,084 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:30,085 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash -188563146, now seen corresponding path program 16 times [2022-04-06 14:21:30,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:30,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758922928] [2022-04-06 14:21:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:30,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:31,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:31,466 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-04-06 14:21:31,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:31,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758922928] [2022-04-06 14:21:31,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758922928] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:31,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219451415] [2022-04-06 14:21:31,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:21:31,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:31,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:31,467 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 14:21:31,467 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 14:21:31,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:21:31,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:31,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 14:21:31,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:32,193 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 14:21:32,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 14:21:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 67 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 14:21:32,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:32,644 INFO L356 Elim1Store]: treesize reduction 49, result has 70.7 percent of original size [2022-04-06 14:21:32,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 143 [2022-04-06 14:21:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 14:21:33,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219451415] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:33,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:33,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 15] total 46 [2022-04-06 14:21:33,011 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:33,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1634181444] [2022-04-06 14:21:33,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1634181444] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:33,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:33,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 14:21:33,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052021200] [2022-04-06 14:21:33,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:33,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 14:21:33,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:33,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 14:21:33,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 14:21:33,013 INFO L87 Difference]: Start difference. First operand 524 states and 604 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 14:21:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:35,706 INFO L93 Difference]: Finished difference Result 1069 states and 1239 transitions. [2022-04-06 14:21:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 14:21:35,706 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 72 [2022-04-06 14:21:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:35,709 INFO L225 Difference]: With dead ends: 1069 [2022-04-06 14:21:35,709 INFO L226 Difference]: Without dead ends: 1006 [2022-04-06 14:21:35,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 122 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=647, Invalid=3775, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 14:21:35,710 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 233 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:35,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 94 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:21:35,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-04-06 14:21:36,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 597. [2022-04-06 14:21:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 592 states have (on average 1.1418918918918919) internal successors, (676), 592 states have internal predecessors, (676), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 680 transitions. [2022-04-06 14:21:36,395 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 680 transitions. Word has length 72 [2022-04-06 14:21:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:36,395 INFO L478 AbstractCegarLoop]: Abstraction has 597 states and 680 transitions. [2022-04-06 14:21:36,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 14:21:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 680 transitions. [2022-04-06 14:21:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 14:21:36,396 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:36,396 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:36,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 14:21:36,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:36,611 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash 673002482, now seen corresponding path program 17 times [2022-04-06 14:21:36,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:36,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [356053212] [2022-04-06 14:21:36,613 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:36,613 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:36,613 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:36,613 INFO L85 PathProgramCache]: Analyzing trace with hash 673002482, now seen corresponding path program 18 times [2022-04-06 14:21:36,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:36,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953271862] [2022-04-06 14:21:36,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:36,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:37,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 14:21:37,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953271862] [2022-04-06 14:21:37,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953271862] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515942826] [2022-04-06 14:21:37,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:21:37,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:37,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:37,928 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 14:21:37,928 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 14:21:38,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 14:21:38,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:38,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 14:21:38,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:38,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2022-04-06 14:21:38,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-04-06 14:21:39,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:21:39,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:21:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:21:39,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:21:39,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:21:39,092 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-04-06 14:21:39,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 34 [2022-04-06 14:21:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-04-06 14:21:39,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 14:21:40,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515942826] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:40,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:40,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 20] total 54 [2022-04-06 14:21:40,487 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:40,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [356053212] [2022-04-06 14:21:40,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [356053212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:40,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:40,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 14:21:40,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307907376] [2022-04-06 14:21:40,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:40,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 14:21:40,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:40,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 14:21:40,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=2412, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 14:21:40,488 INFO L87 Difference]: Start difference. First operand 597 states and 680 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 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 14:21:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:43,178 INFO L93 Difference]: Finished difference Result 1128 states and 1300 transitions. [2022-04-06 14:21:43,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 14:21:43,179 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 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 72 [2022-04-06 14:21:43,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:43,181 INFO L225 Difference]: With dead ends: 1128 [2022-04-06 14:21:43,181 INFO L226 Difference]: Without dead ends: 1084 [2022-04-06 14:21:43,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=782, Invalid=4048, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 14:21:43,182 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 237 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:43,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 86 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:21:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-04-06 14:21:44,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 835. [2022-04-06 14:21:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 830 states have (on average 1.1506024096385543) internal successors, (955), 830 states have internal predecessors, (955), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 959 transitions. [2022-04-06 14:21:44,141 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 959 transitions. Word has length 72 [2022-04-06 14:21:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:44,141 INFO L478 AbstractCegarLoop]: Abstraction has 835 states and 959 transitions. [2022-04-06 14:21:44,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 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 14:21:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 959 transitions. [2022-04-06 14:21:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 14:21:44,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:44,143 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:44,169 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 14:21:44,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 14:21:44,358 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:44,358 INFO L85 PathProgramCache]: Analyzing trace with hash 479223478, now seen corresponding path program 19 times [2022-04-06 14:21:44,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:44,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [369697090] [2022-04-06 14:21:44,359 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:44,359 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:44,359 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:44,359 INFO L85 PathProgramCache]: Analyzing trace with hash 479223478, now seen corresponding path program 20 times [2022-04-06 14:21:44,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:44,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508975720] [2022-04-06 14:21:44,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:44,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:46,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-04-06 14:21:46,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508975720] [2022-04-06 14:21:46,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508975720] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50613282] [2022-04-06 14:21:46,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:21:46,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:46,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:46,006 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 14:21:46,006 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 14:21:46,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:21:46,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:46,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 14:21:46,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:46,709 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 14:21:46,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-04-06 14:21:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 14:21:46,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:47,380 INFO L356 Elim1Store]: treesize reduction 56, result has 68.0 percent of original size [2022-04-06 14:21:47,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 143 [2022-04-06 14:21:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 14:21:47,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50613282] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:47,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:47,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 16] total 46 [2022-04-06 14:21:47,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:47,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [369697090] [2022-04-06 14:21:47,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [369697090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:47,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:47,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 14:21:47,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563680245] [2022-04-06 14:21:47,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:47,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 14:21:47,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:47,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 14:21:47,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1804, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 14:21:47,842 INFO L87 Difference]: Start difference. First operand 835 states and 959 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 14:21:50,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:50,628 INFO L93 Difference]: Finished difference Result 1379 states and 1584 transitions. [2022-04-06 14:21:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 14:21:50,629 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 72 [2022-04-06 14:21:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:50,631 INFO L225 Difference]: With dead ends: 1379 [2022-04-06 14:21:50,631 INFO L226 Difference]: Without dead ends: 1106 [2022-04-06 14:21:50,632 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=660, Invalid=3762, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 14:21:50,632 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 271 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:50,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 78 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:21:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-04-06 14:21:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 919. [2022-04-06 14:21:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 914 states have (on average 1.1334792122538293) internal successors, (1036), 914 states have internal predecessors, (1036), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1040 transitions. [2022-04-06 14:21:51,707 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1040 transitions. Word has length 72 [2022-04-06 14:21:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:51,707 INFO L478 AbstractCegarLoop]: Abstraction has 919 states and 1040 transitions. [2022-04-06 14:21:51,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 14:21:51,707 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1040 transitions. [2022-04-06 14:21:51,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 14:21:51,708 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:51,708 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:51,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 14:21:51,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 14:21:51,909 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:51,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:51,910 INFO L85 PathProgramCache]: Analyzing trace with hash -532379858, now seen corresponding path program 21 times [2022-04-06 14:21:51,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:51,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1274606186] [2022-04-06 14:21:51,911 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:51,911 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:51,911 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:51,911 INFO L85 PathProgramCache]: Analyzing trace with hash -532379858, now seen corresponding path program 22 times [2022-04-06 14:21:51,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:51,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462696715] [2022-04-06 14:21:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:51,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:52,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-04-06 14:21:52,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462696715] [2022-04-06 14:21:52,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462696715] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419750302] [2022-04-06 14:21:52,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:21:52,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:52,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:52,775 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 14:21:52,785 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 14:21:52,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:21:52,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:52,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 14:21:52,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:53,209 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 14:21:53,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-04-06 14:21:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 14:21:53,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:53,470 INFO L356 Elim1Store]: treesize reduction 44, result has 70.9 percent of original size [2022-04-06 14:21:53,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 136 [2022-04-06 14:21:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 14:21:53,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419750302] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:53,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:53,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 9] total 27 [2022-04-06 14:21:53,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:53,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1274606186] [2022-04-06 14:21:53,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1274606186] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:53,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:53,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:21:53,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154698671] [2022-04-06 14:21:53,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:53,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:21:53,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:21:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2022-04-06 14:21:53,679 INFO L87 Difference]: Start difference. First operand 919 states and 1040 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 14:21:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:55,627 INFO L93 Difference]: Finished difference Result 1256 states and 1407 transitions. [2022-04-06 14:21:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:21:55,628 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-04-06 14:21:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:55,630 INFO L225 Difference]: With dead ends: 1256 [2022-04-06 14:21:55,631 INFO L226 Difference]: Without dead ends: 1106 [2022-04-06 14:21:55,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=1111, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:21:55,631 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 190 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:55,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 57 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:21:55,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-04-06 14:21:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 909. [2022-04-06 14:21:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 904 states have (on average 1.1194690265486726) internal successors, (1012), 904 states have internal predecessors, (1012), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1016 transitions. [2022-04-06 14:21:56,709 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1016 transitions. Word has length 72 [2022-04-06 14:21:56,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:56,709 INFO L478 AbstractCegarLoop]: Abstraction has 909 states and 1016 transitions. [2022-04-06 14:21:56,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 14:21:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1016 transitions. [2022-04-06 14:21:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 14:21:56,710 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:56,710 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:56,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 14:21:56,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:56,911 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:56,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:56,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2132024177, now seen corresponding path program 23 times [2022-04-06 14:21:56,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:56,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1920320691] [2022-04-06 14:21:56,913 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:56,913 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:56,913 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:56,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2132024177, now seen corresponding path program 24 times [2022-04-06 14:21:56,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:56,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357602839] [2022-04-06 14:21:56,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:56,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:57,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 14:21:57,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:57,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357602839] [2022-04-06 14:21:57,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357602839] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:57,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065693224] [2022-04-06 14:21:57,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:21:57,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:57,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:57,103 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 14:21:57,135 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 14:21:57,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:21:57,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:57,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 14:21:57,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:58,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:21:58,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:21:58,146 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:21:58,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2022-04-06 14:21:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-04-06 14:21:58,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-04-06 14:21:58,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065693224] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:58,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:58,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 33 [2022-04-06 14:21:58,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:58,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1920320691] [2022-04-06 14:21:58,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1920320691] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:58,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:58,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:21:58,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094213246] [2022-04-06 14:21:58,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:58,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:21:58,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:58,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:21:58,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 14:21:58,606 INFO L87 Difference]: Start difference. First operand 909 states and 1016 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:02,346 INFO L93 Difference]: Finished difference Result 2434 states and 2808 transitions. [2022-04-06 14:22:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:22:02,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 14:22:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:02,353 INFO L225 Difference]: With dead ends: 2434 [2022-04-06 14:22:02,354 INFO L226 Difference]: Without dead ends: 2377 [2022-04-06 14:22:02,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 14:22:02,355 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 316 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:02,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 165 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:22:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-04-06 14:22:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 911. [2022-04-06 14:22:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 906 states have (on average 1.120309050772627) internal successors, (1015), 906 states have internal predecessors, (1015), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1019 transitions. [2022-04-06 14:22:03,461 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1019 transitions. Word has length 73 [2022-04-06 14:22:03,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:03,461 INFO L478 AbstractCegarLoop]: Abstraction has 911 states and 1019 transitions. [2022-04-06 14:22:03,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:03,461 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1019 transitions. [2022-04-06 14:22:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 14:22:03,463 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:03,463 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:03,487 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 14:22:03,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 14:22:03,675 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:03,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:03,676 INFO L85 PathProgramCache]: Analyzing trace with hash -505226483, now seen corresponding path program 25 times [2022-04-06 14:22:03,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:03,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [883625673] [2022-04-06 14:22:03,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:03,677 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:03,677 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:03,677 INFO L85 PathProgramCache]: Analyzing trace with hash -505226483, now seen corresponding path program 26 times [2022-04-06 14:22:03,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:03,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113396284] [2022-04-06 14:22:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:03,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:03,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 14:22:03,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:03,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113396284] [2022-04-06 14:22:03,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113396284] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:03,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489055519] [2022-04-06 14:22:03,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:22:03,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:03,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:03,824 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 14:22:03,826 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 14:22:03,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:22:03,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:03,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 14:22:03,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:04,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:22:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 14:22:04,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:04,800 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:22:04,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:22:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 14:22:04,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489055519] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:04,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:04,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 11] total 34 [2022-04-06 14:22:04,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:04,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [883625673] [2022-04-06 14:22:04,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [883625673] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:04,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:04,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:22:04,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468380356] [2022-04-06 14:22:04,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:04,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:22:04,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:04,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:22:04,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:22:04,886 INFO L87 Difference]: Start difference. First operand 911 states and 1019 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 14:22:07,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:07,264 INFO L93 Difference]: Finished difference Result 1583 states and 1801 transitions. [2022-04-06 14:22:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:22:07,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 74 [2022-04-06 14:22:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:07,269 INFO L225 Difference]: With dead ends: 1583 [2022-04-06 14:22:07,269 INFO L226 Difference]: Without dead ends: 1490 [2022-04-06 14:22:07,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 14:22:07,270 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 248 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:07,270 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 81 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:22:07,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2022-04-06 14:22:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 969. [2022-04-06 14:22:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 964 states have (on average 1.1213692946058091) internal successors, (1081), 964 states have internal predecessors, (1081), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:08,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1085 transitions. [2022-04-06 14:22:08,435 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1085 transitions. Word has length 74 [2022-04-06 14:22:08,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:08,435 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1085 transitions. [2022-04-06 14:22:08,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 14:22:08,435 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1085 transitions. [2022-04-06 14:22:08,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 14:22:08,437 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:08,437 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:08,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 14:22:08,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:08,638 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:08,639 INFO L85 PathProgramCache]: Analyzing trace with hash 583415094, now seen corresponding path program 27 times [2022-04-06 14:22:08,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:08,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [961345955] [2022-04-06 14:22:08,640 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:08,640 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:08,640 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:08,640 INFO L85 PathProgramCache]: Analyzing trace with hash 583415094, now seen corresponding path program 28 times [2022-04-06 14:22:08,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:08,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347246062] [2022-04-06 14:22:08,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:08,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:08,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 14:22:08,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:08,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347246062] [2022-04-06 14:22:08,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347246062] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:08,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976865884] [2022-04-06 14:22:08,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:22:08,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:08,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:08,829 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 14:22:08,856 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 14:22:08,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:22:08,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:08,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 14:22:08,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:09,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:22:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-06 14:22:09,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:09,801 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:22:09,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:22:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-04-06 14:22:09,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976865884] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:09,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:09,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 11] total 37 [2022-04-06 14:22:09,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:09,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [961345955] [2022-04-06 14:22:09,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [961345955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:09,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:09,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:22:09,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955105672] [2022-04-06 14:22:09,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:09,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:22:09,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:09,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:22:09,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 14:22:09,923 INFO L87 Difference]: Start difference. First operand 969 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 14:22:14,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:14,445 INFO L93 Difference]: Finished difference Result 2750 states and 3178 transitions. [2022-04-06 14:22:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:22:14,445 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 75 [2022-04-06 14:22:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:14,451 INFO L225 Difference]: With dead ends: 2750 [2022-04-06 14:22:14,452 INFO L226 Difference]: Without dead ends: 2693 [2022-04-06 14:22:14,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=2168, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 14:22:14,453 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 346 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:14,453 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 189 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:22:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2022-04-06 14:22:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 971. [2022-04-06 14:22:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 966 states have (on average 1.1221532091097308) internal successors, (1084), 966 states have internal predecessors, (1084), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1088 transitions. [2022-04-06 14:22:15,653 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1088 transitions. Word has length 75 [2022-04-06 14:22:15,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:15,653 INFO L478 AbstractCegarLoop]: Abstraction has 971 states and 1088 transitions. [2022-04-06 14:22:15,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 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 14:22:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1088 transitions. [2022-04-06 14:22:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 14:22:15,655 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:15,655 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:15,679 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 14:22:15,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:15,879 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:15,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1267467800, now seen corresponding path program 29 times [2022-04-06 14:22:15,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:15,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [974589416] [2022-04-06 14:22:15,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:15,880 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:15,880 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:15,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1267467800, now seen corresponding path program 30 times [2022-04-06 14:22:15,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:15,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958226042] [2022-04-06 14:22:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:15,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:16,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 14:22:16,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:16,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958226042] [2022-04-06 14:22:16,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958226042] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:16,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965699349] [2022-04-06 14:22:16,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:22:16,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:16,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:16,040 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 14:22:16,067 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 14:22:16,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 14:22:16,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:16,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 14:22:16,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:16,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2022-04-06 14:22:16,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-04-06 14:22:16,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:22:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 14:22:16,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-04-06 14:22:17,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965699349] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:17,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:17,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 11] total 33 [2022-04-06 14:22:17,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:17,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [974589416] [2022-04-06 14:22:17,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [974589416] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:17,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:17,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:22:17,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369159656] [2022-04-06 14:22:17,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:17,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:22:17,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:17,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:22:17,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 14:22:17,168 INFO L87 Difference]: Start difference. First operand 971 states and 1088 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:22:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:20,165 INFO L93 Difference]: Finished difference Result 1875 states and 2147 transitions. [2022-04-06 14:22:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:22:20,166 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 76 [2022-04-06 14:22:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:20,169 INFO L225 Difference]: With dead ends: 1875 [2022-04-06 14:22:20,169 INFO L226 Difference]: Without dead ends: 1782 [2022-04-06 14:22:20,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 14:22:20,170 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 260 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:20,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 109 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:22:20,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2022-04-06 14:22:21,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 971. [2022-04-06 14:22:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 966 states have (on average 1.1221532091097308) internal successors, (1084), 966 states have internal predecessors, (1084), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1088 transitions. [2022-04-06 14:22:21,387 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1088 transitions. Word has length 76 [2022-04-06 14:22:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:21,387 INFO L478 AbstractCegarLoop]: Abstraction has 971 states and 1088 transitions. [2022-04-06 14:22:21,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 14:22:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1088 transitions. [2022-04-06 14:22:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 14:22:21,389 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:21,389 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:21,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 14:22:21,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 14:22:21,589 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:21,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:21,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1571229253, now seen corresponding path program 31 times [2022-04-06 14:22:21,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:21,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [770674625] [2022-04-06 14:22:21,591 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:21,591 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:21,591 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:21,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1571229253, now seen corresponding path program 32 times [2022-04-06 14:22:21,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:21,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048761786] [2022-04-06 14:22:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:21,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:21,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 14:22:21,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048761786] [2022-04-06 14:22:21,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048761786] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822617690] [2022-04-06 14:22:21,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:22:21,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:21,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:21,816 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 14:22:21,846 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 14:22:21,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:22:21,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:21,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 14:22:21,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:22,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:22:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-04-06 14:22:22,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:22,820 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:22:22,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:22:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 7 proven. 65 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 14:22:22,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822617690] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:22,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:22,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 11] total 38 [2022-04-06 14:22:22,919 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:22,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [770674625] [2022-04-06 14:22:22,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [770674625] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:22,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:22,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:22:22,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15025099] [2022-04-06 14:22:22,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:22,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:22:22,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:22,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:22:22,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:22:22,920 INFO L87 Difference]: Start difference. First operand 971 states and 1088 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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 14:22:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:28,279 INFO L93 Difference]: Finished difference Result 3066 states and 3548 transitions. [2022-04-06 14:22:28,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 14:22:28,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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 77 [2022-04-06 14:22:28,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:28,288 INFO L225 Difference]: With dead ends: 3066 [2022-04-06 14:22:28,288 INFO L226 Difference]: Without dead ends: 3009 [2022-04-06 14:22:28,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=2366, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 14:22:28,290 INFO L913 BasicCegarLoop]: 156 mSDtfsCounter, 369 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2226 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:28,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 218 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2226 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 14:22:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2022-04-06 14:22:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 973. [2022-04-06 14:22:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 968 states have (on average 1.1229338842975207) internal successors, (1087), 968 states have internal predecessors, (1087), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:29,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1091 transitions. [2022-04-06 14:22:29,533 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1091 transitions. Word has length 77 [2022-04-06 14:22:29,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:29,533 INFO L478 AbstractCegarLoop]: Abstraction has 973 states and 1091 transitions. [2022-04-06 14:22:29,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 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 14:22:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1091 transitions. [2022-04-06 14:22:29,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 14:22:29,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:29,534 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:29,551 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 14:22:29,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 14:22:29,735 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:29,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:29,735 INFO L85 PathProgramCache]: Analyzing trace with hash 658034179, now seen corresponding path program 33 times [2022-04-06 14:22:29,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:29,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [287266000] [2022-04-06 14:22:29,736 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:29,736 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:29,736 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:29,736 INFO L85 PathProgramCache]: Analyzing trace with hash 658034179, now seen corresponding path program 34 times [2022-04-06 14:22:29,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:29,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055097833] [2022-04-06 14:22:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:29,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:29,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 14:22:29,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:29,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055097833] [2022-04-06 14:22:29,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055097833] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:29,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238573012] [2022-04-06 14:22:29,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:22:29,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:29,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:29,904 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 14:22:29,923 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 14:22:30,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:22:30,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:30,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 14:22:30,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:30,487 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:22:30,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 14:22:30,511 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 20 proven. 54 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 14:22:30,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:30,857 INFO L356 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2022-04-06 14:22:30,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-04-06 14:22:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 14:22:31,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238573012] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:31,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:31,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 32 [2022-04-06 14:22:31,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:31,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [287266000] [2022-04-06 14:22:31,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [287266000] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:31,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:31,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:22:31,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724590119] [2022-04-06 14:22:31,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:31,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:22:31,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:31,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:22:31,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-04-06 14:22:31,176 INFO L87 Difference]: Start difference. First operand 973 states and 1091 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:35,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:35,037 INFO L93 Difference]: Finished difference Result 2240 states and 2574 transitions. [2022-04-06 14:22:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:22:35,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-04-06 14:22:35,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:35,041 INFO L225 Difference]: With dead ends: 2240 [2022-04-06 14:22:35,041 INFO L226 Difference]: Without dead ends: 2147 [2022-04-06 14:22:35,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 14:22:35,041 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 342 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:35,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 124 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:22:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2022-04-06 14:22:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 973. [2022-04-06 14:22:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 968 states have (on average 1.1229338842975207) internal successors, (1087), 968 states have internal predecessors, (1087), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1091 transitions. [2022-04-06 14:22:36,267 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1091 transitions. Word has length 78 [2022-04-06 14:22:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:36,267 INFO L478 AbstractCegarLoop]: Abstraction has 973 states and 1091 transitions. [2022-04-06 14:22:36,267 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:36,267 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1091 transitions. [2022-04-06 14:22:36,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 14:22:36,268 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:36,268 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:36,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 14:22:36,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 14:22:36,469 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:36,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:36,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2010210048, now seen corresponding path program 35 times [2022-04-06 14:22:36,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:36,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [176178195] [2022-04-06 14:22:36,470 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:36,471 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:36,471 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:36,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2010210048, now seen corresponding path program 36 times [2022-04-06 14:22:36,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:36,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545792164] [2022-04-06 14:22:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:36,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:36,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 14:22:36,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:36,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545792164] [2022-04-06 14:22:36,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545792164] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:36,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970698417] [2022-04-06 14:22:36,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:22:36,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:36,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:36,689 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 14:22:36,690 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 14:22:36,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:22:36,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:36,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 14:22:36,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-04-06 14:22:37,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:38,116 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-04-06 14:22:38,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-04-06 14:22:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-04-06 14:22:38,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970698417] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:38,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:38,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 11] total 38 [2022-04-06 14:22:38,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:38,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [176178195] [2022-04-06 14:22:38,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [176178195] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:38,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:38,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:22:38,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505729220] [2022-04-06 14:22:38,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:38,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:22:38,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:22:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:22:38,151 INFO L87 Difference]: Start difference. First operand 973 states and 1091 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 14:22:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:44,371 INFO L93 Difference]: Finished difference Result 3382 states and 3918 transitions. [2022-04-06 14:22:44,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:22:44,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 79 [2022-04-06 14:22:44,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:44,376 INFO L225 Difference]: With dead ends: 3382 [2022-04-06 14:22:44,376 INFO L226 Difference]: Without dead ends: 3325 [2022-04-06 14:22:44,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=291, Invalid=2361, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:22:44,377 INFO L913 BasicCegarLoop]: 175 mSDtfsCounter, 413 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2530 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:44,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 237 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2530 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 14:22:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2022-04-06 14:22:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 975. [2022-04-06 14:22:45,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 970 states have (on average 1.1237113402061856) internal successors, (1090), 970 states have internal predecessors, (1090), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1094 transitions. [2022-04-06 14:22:45,657 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1094 transitions. Word has length 79 [2022-04-06 14:22:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:45,657 INFO L478 AbstractCegarLoop]: Abstraction has 975 states and 1094 transitions. [2022-04-06 14:22:45,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 14:22:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1094 transitions. [2022-04-06 14:22:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 14:22:45,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:45,658 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:45,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 14:22:45,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:45,859 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:45,859 INFO L85 PathProgramCache]: Analyzing trace with hash -65468578, now seen corresponding path program 37 times [2022-04-06 14:22:45,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:45,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [466619306] [2022-04-06 14:22:45,860 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:45,860 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:45,860 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:45,860 INFO L85 PathProgramCache]: Analyzing trace with hash -65468578, now seen corresponding path program 38 times [2022-04-06 14:22:45,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:45,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122000279] [2022-04-06 14:22:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:45,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:46,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 14:22:46,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:46,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122000279] [2022-04-06 14:22:46,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122000279] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:46,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109480885] [2022-04-06 14:22:46,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:22:46,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:46,056 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 14:22:46,057 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 14:22:46,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:22:46,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:46,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 14:22:46,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:46,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 14:22:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 14:22:46,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:47,051 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:22:47,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:22:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 14:22:47,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109480885] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:47,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:47,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 11] total 36 [2022-04-06 14:22:47,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:47,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [466619306] [2022-04-06 14:22:47,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [466619306] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:47,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:47,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:22:47,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624940142] [2022-04-06 14:22:47,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:47,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:22:47,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:47,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:22:47,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1142, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 14:22:47,145 INFO L87 Difference]: Start difference. First operand 975 states and 1094 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 14:22:51,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:51,621 INFO L93 Difference]: Finished difference Result 2513 states and 2893 transitions. [2022-04-06 14:22:51,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:22:51,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 80 [2022-04-06 14:22:51,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:51,627 INFO L225 Difference]: With dead ends: 2513 [2022-04-06 14:22:51,628 INFO L226 Difference]: Without dead ends: 2420 [2022-04-06 14:22:51,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=2073, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 14:22:51,629 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 336 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:51,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 145 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:22:51,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2022-04-06 14:22:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 975. [2022-04-06 14:22:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 970 states have (on average 1.1237113402061856) internal successors, (1090), 970 states have internal predecessors, (1090), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1094 transitions. [2022-04-06 14:22:52,919 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1094 transitions. Word has length 80 [2022-04-06 14:22:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:52,919 INFO L478 AbstractCegarLoop]: Abstraction has 975 states and 1094 transitions. [2022-04-06 14:22:52,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 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 14:22:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1094 transitions. [2022-04-06 14:22:52,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 14:22:52,921 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:52,921 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:52,938 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 14:22:53,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 14:22:53,121 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:53,122 INFO L85 PathProgramCache]: Analyzing trace with hash 598040280, now seen corresponding path program 39 times [2022-04-06 14:22:53,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:53,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [346941052] [2022-04-06 14:22:53,123 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:53,123 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:53,123 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:53,123 INFO L85 PathProgramCache]: Analyzing trace with hash 598040280, now seen corresponding path program 40 times [2022-04-06 14:22:53,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:53,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72661358] [2022-04-06 14:22:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:53,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:53,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 14:22:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:53,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72661358] [2022-04-06 14:22:53,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72661358] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:53,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023473946] [2022-04-06 14:22:53,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:22:53,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:53,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:53,260 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 14:22:53,287 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 14:22:53,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:22:53,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:53,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 14:22:53,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 43 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 14:22:53,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 27 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 14:22:53,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023473946] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:53,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:53,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2022-04-06 14:22:53,755 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:53,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [346941052] [2022-04-06 14:22:53,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [346941052] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:53,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:53,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:22:53,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880268216] [2022-04-06 14:22:53,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:53,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:22:53,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:22:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-04-06 14:22:53,756 INFO L87 Difference]: Start difference. First operand 975 states and 1094 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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 14:22:54,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:54,906 INFO L93 Difference]: Finished difference Result 1126 states and 1265 transitions. [2022-04-06 14:22:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:22:54,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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 81 [2022-04-06 14:22:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:54,907 INFO L225 Difference]: With dead ends: 1126 [2022-04-06 14:22:54,907 INFO L226 Difference]: Without dead ends: 596 [2022-04-06 14:22:54,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2022-04-06 14:22:54,908 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:54,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 71 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:22:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-04-06 14:22:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 539. [2022-04-06 14:22:55,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 534 states have (on average 1.142322097378277) internal successors, (610), 534 states have internal predecessors, (610), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 614 transitions. [2022-04-06 14:22:55,636 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 614 transitions. Word has length 81 [2022-04-06 14:22:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:55,636 INFO L478 AbstractCegarLoop]: Abstraction has 539 states and 614 transitions. [2022-04-06 14:22:55,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 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 14:22:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 614 transitions. [2022-04-06 14:22:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 14:22:55,637 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:55,637 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:55,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 14:22:55,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 14:22:55,837 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:55,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1331008261, now seen corresponding path program 41 times [2022-04-06 14:22:55,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:55,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429813352] [2022-04-06 14:22:55,839 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:55,839 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:55,839 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:55,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1331008261, now seen corresponding path program 42 times [2022-04-06 14:22:55,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:55,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012907654] [2022-04-06 14:22:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:55,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:56,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 14:22:56,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:56,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012907654] [2022-04-06 14:22:56,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012907654] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:56,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086859207] [2022-04-06 14:22:56,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:22:56,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:56,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:56,084 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 14:22:56,084 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 14:22:56,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:22:56,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:56,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 14:22:56,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:57,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:22:57,003 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:22:57,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-04-06 14:22:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-04-06 14:22:57,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:57,496 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-04-06 14:22:57,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-04-06 14:22:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-04-06 14:22:57,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086859207] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:57,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:57,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 13] total 37 [2022-04-06 14:22:57,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429813352] [2022-04-06 14:22:57,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429813352] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:57,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:57,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:22:57,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412690036] [2022-04-06 14:22:57,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:57,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:22:57,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:57,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:22:57,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 14:22:57,533 INFO L87 Difference]: Start difference. First operand 539 states and 614 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:04,196 INFO L93 Difference]: Finished difference Result 3239 states and 3779 transitions. [2022-04-06 14:23:04,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 14:23:04,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 14:23:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:04,202 INFO L225 Difference]: With dead ends: 3239 [2022-04-06 14:23:04,202 INFO L226 Difference]: Without dead ends: 3182 [2022-04-06 14:23:04,203 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=266, Invalid=2386, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:23:04,204 INFO L913 BasicCegarLoop]: 194 mSDtfsCounter, 441 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3227 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:04,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 266 Invalid, 3257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3227 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 14:23:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2022-04-06 14:23:05,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 541. [2022-04-06 14:23:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 536 states have (on average 1.1436567164179106) internal successors, (613), 536 states have internal predecessors, (613), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 617 transitions. [2022-04-06 14:23:05,036 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 617 transitions. Word has length 81 [2022-04-06 14:23:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:05,036 INFO L478 AbstractCegarLoop]: Abstraction has 541 states and 617 transitions. [2022-04-06 14:23:05,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 617 transitions. [2022-04-06 14:23:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 14:23:05,037 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:05,037 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:05,053 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 14:23:05,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:05,238 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:05,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:05,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1790824352, now seen corresponding path program 43 times [2022-04-06 14:23:05,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:05,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [197654803] [2022-04-06 14:23:05,239 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:05,239 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:05,239 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:05,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1790824352, now seen corresponding path program 44 times [2022-04-06 14:23:05,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:05,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066340195] [2022-04-06 14:23:05,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:05,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:05,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-04-06 14:23:06,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:06,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066340195] [2022-04-06 14:23:06,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066340195] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:06,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517531053] [2022-04-06 14:23:06,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:23:06,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:06,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:06,003 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 14:23:06,004 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 14:23:06,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:23:06,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:06,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 14:23:06,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:06,963 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:23:06,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 17 [2022-04-06 14:23:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 36 proven. 82 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 14:23:06,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:09,329 INFO L356 Elim1Store]: treesize reduction 102, result has 29.7 percent of original size [2022-04-06 14:23:09,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 76 [2022-04-06 14:23:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 39 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 14:23:09,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517531053] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:09,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:09,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 17] total 53 [2022-04-06 14:23:09,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:09,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [197654803] [2022-04-06 14:23:09,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [197654803] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:09,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:09,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 14:23:09,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465151293] [2022-04-06 14:23:09,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:09,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 14:23:09,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:09,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 14:23:09,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=2434, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 14:23:09,481 INFO L87 Difference]: Start difference. First operand 541 states and 617 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:11,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:11,101 INFO L93 Difference]: Finished difference Result 588 states and 668 transitions. [2022-04-06 14:23:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:23:11,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-04-06 14:23:11,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:11,102 INFO L225 Difference]: With dead ends: 588 [2022-04-06 14:23:11,102 INFO L226 Difference]: Without dead ends: 383 [2022-04-06 14:23:11,103 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=524, Invalid=3898, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 14:23:11,103 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 187 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:11,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 76 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:23:11,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-04-06 14:23:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2022-04-06 14:23:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 378 states have (on average 1.17989417989418) internal successors, (446), 378 states have internal predecessors, (446), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 450 transitions. [2022-04-06 14:23:11,666 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 450 transitions. Word has length 82 [2022-04-06 14:23:11,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:11,667 INFO L478 AbstractCegarLoop]: Abstraction has 383 states and 450 transitions. [2022-04-06 14:23:11,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 450 transitions. [2022-04-06 14:23:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 14:23:11,668 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:11,668 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:11,692 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 14:23:11,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 14:23:11,883 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:11,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash 433083897, now seen corresponding path program 45 times [2022-04-06 14:23:11,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:11,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [336449589] [2022-04-06 14:23:11,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:11,885 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:11,885 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash 433083897, now seen corresponding path program 46 times [2022-04-06 14:23:11,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:11,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36458732] [2022-04-06 14:23:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:11,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:12,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 14:23:12,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:12,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36458732] [2022-04-06 14:23:12,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36458732] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:12,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485206071] [2022-04-06 14:23:12,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:23:12,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:12,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:12,086 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 14:23:12,087 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 14:23:12,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:23:12,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:12,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 14:23:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:12,810 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:23:12,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 14:23:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 20 proven. 60 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 14:23:12,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:13,192 INFO L356 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2022-04-06 14:23:13,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-04-06 14:23:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 14:23:13,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485206071] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:13,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:13,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 12] total 36 [2022-04-06 14:23:13,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:13,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [336449589] [2022-04-06 14:23:13,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [336449589] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:13,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:13,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:23:13,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122973625] [2022-04-06 14:23:13,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:13,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:23:13,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:13,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:23:13,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 14:23:13,457 INFO L87 Difference]: Start difference. First operand 383 states and 450 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 14:23:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:17,934 INFO L93 Difference]: Finished difference Result 2217 states and 2595 transitions. [2022-04-06 14:23:17,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:23:17,934 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 82 [2022-04-06 14:23:17,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:17,938 INFO L225 Difference]: With dead ends: 2217 [2022-04-06 14:23:17,938 INFO L226 Difference]: Without dead ends: 2124 [2022-04-06 14:23:17,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=2240, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 14:23:17,939 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 388 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:17,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 146 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 14:23:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2022-04-06 14:23:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 383. [2022-04-06 14:23:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 378 states have (on average 1.17989417989418) internal successors, (446), 378 states have internal predecessors, (446), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 450 transitions. [2022-04-06 14:23:18,610 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 450 transitions. Word has length 82 [2022-04-06 14:23:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:18,611 INFO L478 AbstractCegarLoop]: Abstraction has 383 states and 450 transitions. [2022-04-06 14:23:18,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 14:23:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 450 transitions. [2022-04-06 14:23:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 14:23:18,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:18,612 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:18,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:18,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:18,812 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1126702179, now seen corresponding path program 47 times [2022-04-06 14:23:18,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:18,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [501851375] [2022-04-06 14:23:18,813 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:18,813 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:18,814 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:18,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1126702179, now seen corresponding path program 48 times [2022-04-06 14:23:18,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:18,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090659240] [2022-04-06 14:23:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:18,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:19,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 14:23:19,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:19,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090659240] [2022-04-06 14:23:19,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090659240] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:19,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195108979] [2022-04-06 14:23:19,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:23:19,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:19,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:19,176 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 14:23:19,204 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 14:23:19,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:23:19,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:19,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 14:23:19,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:19,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:23:19,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:23:19,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:23:19,863 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:23:19,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2022-04-06 14:23:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 14:23:19,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:20,198 INFO L356 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2022-04-06 14:23:20,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 32 [2022-04-06 14:23:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 14:23:20,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195108979] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:20,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:20,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 11] total 27 [2022-04-06 14:23:20,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:20,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [501851375] [2022-04-06 14:23:20,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [501851375] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:20,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:20,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:23:20,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021561155] [2022-04-06 14:23:20,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:20,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:23:20,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:20,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:23:20,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-04-06 14:23:20,265 INFO L87 Difference]: Start difference. First operand 383 states and 450 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:21,731 INFO L93 Difference]: Finished difference Result 642 states and 754 transitions. [2022-04-06 14:23:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:23:21,731 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 14:23:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:21,733 INFO L225 Difference]: With dead ends: 642 [2022-04-06 14:23:21,733 INFO L226 Difference]: Without dead ends: 637 [2022-04-06 14:23:21,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 14:23:21,733 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 163 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:21,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 63 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:23:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-04-06 14:23:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 432. [2022-04-06 14:23:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 427 states have (on average 1.1779859484777517) internal successors, (503), 427 states have internal predecessors, (503), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 507 transitions. [2022-04-06 14:23:22,451 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 507 transitions. Word has length 83 [2022-04-06 14:23:22,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:22,451 INFO L478 AbstractCegarLoop]: Abstraction has 432 states and 507 transitions. [2022-04-06 14:23:22,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 507 transitions. [2022-04-06 14:23:22,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:23:22,451 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:22,451 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:22,468 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 14:23:22,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 14:23:22,652 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:22,652 INFO L85 PathProgramCache]: Analyzing trace with hash 162728781, now seen corresponding path program 49 times [2022-04-06 14:23:22,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:22,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [593902029] [2022-04-06 14:23:22,653 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:22,653 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:22,653 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:22,653 INFO L85 PathProgramCache]: Analyzing trace with hash 162728781, now seen corresponding path program 50 times [2022-04-06 14:23:22,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:22,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380632171] [2022-04-06 14:23:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:22,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:22,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 14:23:22,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:22,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380632171] [2022-04-06 14:23:22,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380632171] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:22,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949334175] [2022-04-06 14:23:22,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:23:22,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:22,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:22,844 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 14:23:22,844 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 14:23:22,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:23:22,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:22,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 14:23:22,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 14:23:23,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 14:23:23,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949334175] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:23,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:23,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-04-06 14:23:23,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:23,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [593902029] [2022-04-06 14:23:23,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [593902029] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:23,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:23,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:23:23,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542129774] [2022-04-06 14:23:23,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:23,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:23:23,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:23,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:23:23,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:23:23,577 INFO L87 Difference]: Start difference. First operand 432 states and 507 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:25,690 INFO L93 Difference]: Finished difference Result 742 states and 867 transitions. [2022-04-06 14:23:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 14:23:25,691 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 14:23:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:25,693 INFO L225 Difference]: With dead ends: 742 [2022-04-06 14:23:25,693 INFO L226 Difference]: Without dead ends: 737 [2022-04-06 14:23:25,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 14:23:25,693 INFO L913 BasicCegarLoop]: 142 mSDtfsCounter, 247 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:25,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 189 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:23:25,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-04-06 14:23:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 520. [2022-04-06 14:23:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 515 states have (on average 1.1766990291262136) internal successors, (606), 515 states have internal predecessors, (606), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 610 transitions. [2022-04-06 14:23:26,718 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 610 transitions. Word has length 93 [2022-04-06 14:23:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:26,718 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 610 transitions. [2022-04-06 14:23:26,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 610 transitions. [2022-04-06 14:23:26,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:23:26,719 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:26,719 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:26,735 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 14:23:26,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 14:23:26,919 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:26,920 INFO L85 PathProgramCache]: Analyzing trace with hash -424077233, now seen corresponding path program 51 times [2022-04-06 14:23:26,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:26,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [584979085] [2022-04-06 14:23:26,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:26,921 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:26,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:26,921 INFO L85 PathProgramCache]: Analyzing trace with hash -424077233, now seen corresponding path program 52 times [2022-04-06 14:23:26,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:26,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610456974] [2022-04-06 14:23:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:26,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:28,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 14:23:28,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:28,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610456974] [2022-04-06 14:23:28,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610456974] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:28,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732139046] [2022-04-06 14:23:28,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:23:28,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:28,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:28,145 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 14:23:28,146 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 14:23:28,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:23:28,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 14:23:28,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:23:28,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:23:28,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:23:28,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:23:28,954 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:23:28,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 30 [2022-04-06 14:23:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 123 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-04-06 14:23:28,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:29,498 INFO L356 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2022-04-06 14:23:29,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-04-06 14:23:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-04-06 14:23:29,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732139046] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:29,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:29,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 14] total 44 [2022-04-06 14:23:29,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:29,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [584979085] [2022-04-06 14:23:29,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [584979085] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:29,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:29,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 14:23:29,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323174611] [2022-04-06 14:23:29,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:29,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 14:23:29,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:29,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 14:23:29,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1669, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 14:23:29,876 INFO L87 Difference]: Start difference. First operand 520 states and 610 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:34,063 INFO L93 Difference]: Finished difference Result 1547 states and 1808 transitions. [2022-04-06 14:23:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 14:23:34,063 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 14:23:34,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:34,065 INFO L225 Difference]: With dead ends: 1547 [2022-04-06 14:23:34,065 INFO L226 Difference]: Without dead ends: 1480 [2022-04-06 14:23:34,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=477, Invalid=3305, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 14:23:34,066 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 325 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:34,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 84 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:23:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2022-04-06 14:23:35,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 870. [2022-04-06 14:23:35,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 865 states have (on average 1.169942196531792) internal successors, (1012), 865 states have internal predecessors, (1012), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1016 transitions. [2022-04-06 14:23:35,815 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1016 transitions. Word has length 93 [2022-04-06 14:23:35,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:35,815 INFO L478 AbstractCegarLoop]: Abstraction has 870 states and 1016 transitions. [2022-04-06 14:23:35,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:35,815 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1016 transitions. [2022-04-06 14:23:35,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:23:35,816 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:35,816 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:35,833 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 14:23:36,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:36,017 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:36,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1642709553, now seen corresponding path program 53 times [2022-04-06 14:23:36,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:36,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1263083839] [2022-04-06 14:23:36,018 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:36,018 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:36,018 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1642709553, now seen corresponding path program 54 times [2022-04-06 14:23:36,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:36,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440171707] [2022-04-06 14:23:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:36,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:37,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 47 proven. 82 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 14:23:37,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:37,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440171707] [2022-04-06 14:23:37,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440171707] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:37,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345681678] [2022-04-06 14:23:37,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:23:37,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:37,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:37,288 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 14:23:37,289 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 14:23:37,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 14:23:37,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:37,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 14:23:37,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:37,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2022-04-06 14:23:37,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-04-06 14:23:38,368 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:23:38,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 14:23:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 54 proven. 91 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 14:23:38,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 54 proven. 70 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 14:23:41,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345681678] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:41,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:41,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 18] total 50 [2022-04-06 14:23:41,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:41,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1263083839] [2022-04-06 14:23:41,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1263083839] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:41,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:41,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 14:23:41,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391038479] [2022-04-06 14:23:41,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:41,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 14:23:41,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:41,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 14:23:41,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2093, Unknown=3, NotChecked=0, Total=2450 [2022-04-06 14:23:41,120 INFO L87 Difference]: Start difference. First operand 870 states and 1016 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:45,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:45,634 INFO L93 Difference]: Finished difference Result 1912 states and 2229 transitions. [2022-04-06 14:23:45,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:23:45,634 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 14:23:45,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:45,636 INFO L225 Difference]: With dead ends: 1912 [2022-04-06 14:23:45,636 INFO L226 Difference]: Without dead ends: 1770 [2022-04-06 14:23:45,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=579, Invalid=3450, Unknown=3, NotChecked=0, Total=4032 [2022-04-06 14:23:45,637 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 268 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:45,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 72 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:23:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2022-04-06 14:23:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1239. [2022-04-06 14:23:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1234 states have (on average 1.1685575364667746) internal successors, (1442), 1234 states have internal predecessors, (1442), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1446 transitions. [2022-04-06 14:23:48,038 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1446 transitions. Word has length 93 [2022-04-06 14:23:48,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:23:48,038 INFO L478 AbstractCegarLoop]: Abstraction has 1239 states and 1446 transitions. [2022-04-06 14:23:48,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1446 transitions. [2022-04-06 14:23:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:23:48,041 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:23:48,041 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:23:48,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 14:23:48,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:48,255 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:23:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:23:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash 221262611, now seen corresponding path program 55 times [2022-04-06 14:23:48,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:48,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [262098494] [2022-04-06 14:23:48,257 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:23:48,257 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:23:48,257 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:23:48,257 INFO L85 PathProgramCache]: Analyzing trace with hash 221262611, now seen corresponding path program 56 times [2022-04-06 14:23:48,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:23:48,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732255254] [2022-04-06 14:23:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:23:48,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:23:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:49,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:23:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:23:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 14:23:49,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:23:49,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732255254] [2022-04-06 14:23:49,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732255254] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:23:49,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211839731] [2022-04-06 14:23:49,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:23:49,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:23:49,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:23:49,744 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 14:23:49,745 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 14:23:49,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:23:49,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:23:49,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 14:23:49,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:23:50,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:23:50,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:23:50,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:23:50,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:23:50,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:23:50,685 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:23:50,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 30 [2022-04-06 14:23:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 139 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-04-06 14:23:50,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:23:51,234 INFO L356 Elim1Store]: treesize reduction 47, result has 71.9 percent of original size [2022-04-06 14:23:51,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 145 [2022-04-06 14:23:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 14:23:51,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211839731] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:23:51,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:23:51,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 15] total 40 [2022-04-06 14:23:51,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:23:51,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [262098494] [2022-04-06 14:23:51,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [262098494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:23:51,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:23:51,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 14:23:51,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046284913] [2022-04-06 14:23:51,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:23:51,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 14:23:51,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:23:51,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 14:23:51,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1337, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 14:23:51,674 INFO L87 Difference]: Start difference. First operand 1239 states and 1446 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:23:56,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:23:56,786 INFO L93 Difference]: Finished difference Result 2144 states and 2493 transitions. [2022-04-06 14:23:56,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:23:56,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 14:23:56,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:23:56,789 INFO L225 Difference]: With dead ends: 2144 [2022-04-06 14:23:56,789 INFO L226 Difference]: Without dead ends: 2065 [2022-04-06 14:23:56,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=403, Invalid=2459, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 14:23:56,790 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 214 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:23:56,790 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 92 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:23:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2022-04-06 14:24:00,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1767. [2022-04-06 14:24:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1762 states have (on average 1.1725312145289444) internal successors, (2066), 1762 states have internal predecessors, (2066), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 2070 transitions. [2022-04-06 14:24:00,356 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 2070 transitions. Word has length 93 [2022-04-06 14:24:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:00,356 INFO L478 AbstractCegarLoop]: Abstraction has 1767 states and 2070 transitions. [2022-04-06 14:24:00,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 2070 transitions. [2022-04-06 14:24:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:24:00,358 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:00,358 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:00,374 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 14:24:00,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:00,558 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:00,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1056215119, now seen corresponding path program 57 times [2022-04-06 14:24:00,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:00,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2068296172] [2022-04-06 14:24:00,560 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:00,560 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:00,560 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:00,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1056215119, now seen corresponding path program 58 times [2022-04-06 14:24:00,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:00,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741305720] [2022-04-06 14:24:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:00,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:02,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 14:24:02,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:02,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741305720] [2022-04-06 14:24:02,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741305720] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:02,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473022383] [2022-04-06 14:24:02,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:24:02,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:02,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:02,690 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 14:24:02,691 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 14:24:02,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:24:02,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:02,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 14:24:02,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:24:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:24:03,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:24:03,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:24:03,472 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:24:03,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 31 [2022-04-06 14:24:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 104 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-04-06 14:24:03,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:03,985 INFO L356 Elim1Store]: treesize reduction 50, result has 68.6 percent of original size [2022-04-06 14:24:03,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 138 [2022-04-06 14:24:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-04-06 14:24:04,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473022383] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:04,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:04,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 14] total 45 [2022-04-06 14:24:04,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:04,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2068296172] [2022-04-06 14:24:04,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2068296172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:04,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:04,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 14:24:04,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244224853] [2022-04-06 14:24:04,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:04,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 14:24:04,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:04,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 14:24:04,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1744, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 14:24:04,383 INFO L87 Difference]: Start difference. First operand 1767 states and 2070 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:11,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:11,378 INFO L93 Difference]: Finished difference Result 3420 states and 4001 transitions. [2022-04-06 14:24:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 14:24:11,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 14:24:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:11,381 INFO L225 Difference]: With dead ends: 3420 [2022-04-06 14:24:11,381 INFO L226 Difference]: Without dead ends: 2588 [2022-04-06 14:24:11,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=566, Invalid=3594, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 14:24:11,383 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 315 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:24:11,383 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 87 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:24:11,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2022-04-06 14:24:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2162. [2022-04-06 14:24:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2157 states have (on average 1.1641168289290682) internal successors, (2511), 2157 states have internal predecessors, (2511), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 2515 transitions. [2022-04-06 14:24:15,855 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 2515 transitions. Word has length 93 [2022-04-06 14:24:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:15,855 INFO L478 AbstractCegarLoop]: Abstraction has 2162 states and 2515 transitions. [2022-04-06 14:24:15,855 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 2515 transitions. [2022-04-06 14:24:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:24:15,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:15,859 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:15,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 14:24:16,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 14:24:16,075 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:16,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:16,076 INFO L85 PathProgramCache]: Analyzing trace with hash 862436115, now seen corresponding path program 59 times [2022-04-06 14:24:16,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:16,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [275523765] [2022-04-06 14:24:16,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:16,077 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:16,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:16,077 INFO L85 PathProgramCache]: Analyzing trace with hash 862436115, now seen corresponding path program 60 times [2022-04-06 14:24:16,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:16,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414937149] [2022-04-06 14:24:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:16,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:17,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 14:24:17,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:17,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414937149] [2022-04-06 14:24:17,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414937149] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:17,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576033690] [2022-04-06 14:24:17,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:24:17,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:17,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:17,538 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 14:24:17,538 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 14:24:17,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 14:24:17,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:17,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 14:24:17,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:18,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:24:18,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:24:18,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:24:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:24:18,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:24:18,865 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:24:18,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 31 [2022-04-06 14:24:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 27 proven. 144 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 14:24:18,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:19,483 INFO L356 Elim1Store]: treesize reduction 118, result has 29.3 percent of original size [2022-04-06 14:24:19,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 78 [2022-04-06 14:24:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 26 proven. 114 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-04-06 14:24:19,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576033690] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:19,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:19,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 27, 20] total 54 [2022-04-06 14:24:19,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:19,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [275523765] [2022-04-06 14:24:19,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [275523765] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:19,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:19,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 14:24:19,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961276660] [2022-04-06 14:24:19,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:19,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 14:24:19,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:19,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 14:24:19,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=2471, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 14:24:19,932 INFO L87 Difference]: Start difference. First operand 2162 states and 2515 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:26,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:26,169 INFO L93 Difference]: Finished difference Result 2611 states and 3009 transitions. [2022-04-06 14:24:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 14:24:26,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 14:24:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:26,172 INFO L225 Difference]: With dead ends: 2611 [2022-04-06 14:24:26,172 INFO L226 Difference]: Without dead ends: 2557 [2022-04-06 14:24:26,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 151 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=653, Invalid=4039, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 14:24:26,173 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 329 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:24:26,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 60 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:24:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2022-04-06 14:24:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2271. [2022-04-06 14:24:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2266 states have (on average 1.1619593998234774) internal successors, (2633), 2266 states have internal predecessors, (2633), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 2637 transitions. [2022-04-06 14:24:30,904 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 2637 transitions. Word has length 93 [2022-04-06 14:24:30,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:30,905 INFO L478 AbstractCegarLoop]: Abstraction has 2271 states and 2637 transitions. [2022-04-06 14:24:30,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:30,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 2637 transitions. [2022-04-06 14:24:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:24:30,907 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:30,907 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:30,912 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 14:24:31,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 14:24:31,109 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1261895563, now seen corresponding path program 61 times [2022-04-06 14:24:31,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:31,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1731937332] [2022-04-06 14:24:31,110 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:31,110 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:31,110 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:31,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1261895563, now seen corresponding path program 62 times [2022-04-06 14:24:31,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:31,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799942382] [2022-04-06 14:24:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:31,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:32,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 47 proven. 80 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 14:24:32,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:32,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799942382] [2022-04-06 14:24:32,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799942382] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:32,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886811150] [2022-04-06 14:24:32,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:24:32,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:32,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:32,341 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 14:24:32,341 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 14:24:32,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:24:32,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:32,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 14:24:32,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:33,029 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 14:24:33,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 14:24:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 47 proven. 92 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-04-06 14:24:33,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:33,734 INFO L356 Elim1Store]: treesize reduction 49, result has 72.0 percent of original size [2022-04-06 14:24:33,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 151 [2022-04-06 14:24:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 53 proven. 73 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 14:24:33,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886811150] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:33,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:33,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2022-04-06 14:24:33,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:33,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1731937332] [2022-04-06 14:24:33,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1731937332] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:33,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:33,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:24:33,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886175452] [2022-04-06 14:24:33,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:33,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:24:33,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:33,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:24:33,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 14:24:33,975 INFO L87 Difference]: Start difference. First operand 2271 states and 2637 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:41,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:41,947 INFO L93 Difference]: Finished difference Result 3654 states and 4223 transitions. [2022-04-06 14:24:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:24:41,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 14:24:41,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:41,951 INFO L225 Difference]: With dead ends: 3654 [2022-04-06 14:24:41,951 INFO L226 Difference]: Without dead ends: 3388 [2022-04-06 14:24:41,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 168 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=421, Invalid=2129, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 14:24:41,952 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 155 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:24:41,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 72 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:24:41,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3388 states. [2022-04-06 14:24:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3388 to 3135. [2022-04-06 14:24:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3130 states have (on average 1.1587859424920128) internal successors, (3627), 3130 states have internal predecessors, (3627), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 3631 transitions. [2022-04-06 14:24:48,413 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 3631 transitions. Word has length 93 [2022-04-06 14:24:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:48,413 INFO L478 AbstractCegarLoop]: Abstraction has 3135 states and 3631 transitions. [2022-04-06 14:24:48,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 3631 transitions. [2022-04-06 14:24:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:24:48,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:48,417 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:48,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-06 14:24:48,617 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:48,617 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:48,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:48,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1038747787, now seen corresponding path program 63 times [2022-04-06 14:24:48,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:48,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371511734] [2022-04-06 14:24:48,618 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:48,618 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:48,618 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:48,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1038747787, now seen corresponding path program 64 times [2022-04-06 14:24:48,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:48,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342333940] [2022-04-06 14:24:48,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:48,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:49,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 47 proven. 82 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 14:24:49,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:49,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342333940] [2022-04-06 14:24:49,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342333940] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:49,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621160741] [2022-04-06 14:24:49,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:24:49,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:49,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:49,812 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 14:24:49,813 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 14:24:49,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:24:49,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:49,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 14:24:49,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:50,418 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:24:50,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 14:24:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 54 proven. 61 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 14:24:50,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:50,849 INFO L356 Elim1Store]: treesize reduction 50, result has 68.6 percent of original size [2022-04-06 14:24:50,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 138 [2022-04-06 14:24:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 53 proven. 62 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 14:24:51,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621160741] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:51,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:51,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 13] total 39 [2022-04-06 14:24:51,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:51,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371511734] [2022-04-06 14:24:51,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371511734] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:51,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:51,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 14:24:51,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920391658] [2022-04-06 14:24:51,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:51,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 14:24:51,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 14:24:51,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 14:24:51,095 INFO L87 Difference]: Start difference. First operand 3135 states and 3631 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:59,710 INFO L93 Difference]: Finished difference Result 3743 states and 4289 transitions. [2022-04-06 14:24:59,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:24:59,711 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 14:24:59,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:59,715 INFO L225 Difference]: With dead ends: 3743 [2022-04-06 14:24:59,715 INFO L226 Difference]: Without dead ends: 3577 [2022-04-06 14:24:59,716 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=2343, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 14:24:59,716 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 217 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:24:59,716 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 79 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:24:59,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3577 states. [2022-04-06 14:25:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3577 to 3234. [2022-04-06 14:25:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3229 states have (on average 1.1523691545370083) internal successors, (3721), 3229 states have internal predecessors, (3721), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:25:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 3725 transitions. [2022-04-06 14:25:06,314 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 3725 transitions. Word has length 93 [2022-04-06 14:25:06,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:25:06,314 INFO L478 AbstractCegarLoop]: Abstraction has 3234 states and 3725 transitions. [2022-04-06 14:25:06,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:25:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 3725 transitions. [2022-04-06 14:25:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:25:06,317 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:25:06,317 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:25:06,356 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 14:25:06,518 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:06,518 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:25:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:25:06,518 INFO L85 PathProgramCache]: Analyzing trace with hash 50957903, now seen corresponding path program 65 times [2022-04-06 14:25:06,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:06,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [861168111] [2022-04-06 14:25:06,519 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:25:06,520 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:25:06,520 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:25:06,520 INFO L85 PathProgramCache]: Analyzing trace with hash 50957903, now seen corresponding path program 66 times [2022-04-06 14:25:06,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:25:06,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238632345] [2022-04-06 14:25:06,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:25:06,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:25:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:07,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:25:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 47 proven. 80 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 14:25:07,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:25:07,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238632345] [2022-04-06 14:25:07,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238632345] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:25:07,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393788075] [2022-04-06 14:25:07,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:25:07,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:07,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:25:07,757 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 14:25:07,757 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 14:25:08,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 14:25:08,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:25:08,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 14:25:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:25:08,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:25:08,608 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-04-06 14:25:08,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 18 [2022-04-06 14:25:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 47 proven. 92 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-04-06 14:25:08,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:25:09,090 INFO L356 Elim1Store]: treesize reduction 56, result has 66.5 percent of original size [2022-04-06 14:25:09,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 140 [2022-04-06 14:25:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 14:25:09,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393788075] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:25:09,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:25:09,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2022-04-06 14:25:09,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:25:09,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [861168111] [2022-04-06 14:25:09,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [861168111] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:25:09,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:25:09,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:25:09,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797263098] [2022-04-06 14:25:09,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:25:09,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:25:09,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:09,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:25:09,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 14:25:09,492 INFO L87 Difference]: Start difference. First operand 3234 states and 3725 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:25:17,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:25:17,646 INFO L93 Difference]: Finished difference Result 3648 states and 4173 transitions. [2022-04-06 14:25:17,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 14:25:17,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 14:25:17,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:25:17,650 INFO L225 Difference]: With dead ends: 3648 [2022-04-06 14:25:17,650 INFO L226 Difference]: Without dead ends: 3479 [2022-04-06 14:25:17,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=489, Invalid=2481, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 14:25:17,651 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 222 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:25:17,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 54 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:25:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2022-04-06 14:25:24,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 3230. [2022-04-06 14:25:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3225 states have (on average 1.1475968992248062) internal successors, (3701), 3225 states have internal predecessors, (3701), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:25:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 3705 transitions. [2022-04-06 14:25:24,276 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 3705 transitions. Word has length 93 [2022-04-06 14:25:24,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:25:24,276 INFO L478 AbstractCegarLoop]: Abstraction has 3230 states and 3705 transitions. [2022-04-06 14:25:24,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:25:24,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 3705 transitions. [2022-04-06 14:25:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:25:24,280 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:25:24,280 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:25:24,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 14:25:24,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:24,481 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:25:24,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:25:24,482 INFO L85 PathProgramCache]: Analyzing trace with hash -254667825, now seen corresponding path program 67 times [2022-04-06 14:25:24,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:24,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1903254205] [2022-04-06 14:25:24,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:25:24,483 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:25:24,483 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:25:24,483 INFO L85 PathProgramCache]: Analyzing trace with hash -254667825, now seen corresponding path program 68 times [2022-04-06 14:25:24,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:25:24,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150693064] [2022-04-06 14:25:24,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:25:24,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:25:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:25,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:25:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 19 proven. 43 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-04-06 14:25:25,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:25:25,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150693064] [2022-04-06 14:25:25,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150693064] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:25:25,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025818807] [2022-04-06 14:25:25,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:25:25,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:25:25,260 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 14:25:25,261 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 14:25:25,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:25:25,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:25:25,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 14:25:25,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:25:25,679 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 14:25:25,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-04-06 14:25:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 14:25:25,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:25:25,970 INFO L356 Elim1Store]: treesize reduction 44, result has 70.9 percent of original size [2022-04-06 14:25:25,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 136 [2022-04-06 14:25:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 14:25:26,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025818807] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:25:26,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:25:26,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 14:25:26,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:25:26,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1903254205] [2022-04-06 14:25:26,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1903254205] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:25:26,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:25:26,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:25:26,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476574447] [2022-04-06 14:25:26,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:25:26,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:25:26,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:26,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:25:26,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-04-06 14:25:26,345 INFO L87 Difference]: Start difference. First operand 3230 states and 3705 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 14:25:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:25:35,485 INFO L93 Difference]: Finished difference Result 4468 states and 4991 transitions. [2022-04-06 14:25:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:25:35,486 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 93 [2022-04-06 14:25:35,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:25:35,490 INFO L225 Difference]: With dead ends: 4468 [2022-04-06 14:25:35,490 INFO L226 Difference]: Without dead ends: 3838 [2022-04-06 14:25:35,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 183 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:25:35,491 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 120 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:25:35,492 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 49 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:25:35,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3838 states. [2022-04-06 14:25:41,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3838 to 3190. [2022-04-06 14:25:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3190 states, 3185 states have (on average 1.1328100470957614) internal successors, (3608), 3185 states have internal predecessors, (3608), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:25:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 3612 transitions. [2022-04-06 14:25:41,991 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 3612 transitions. Word has length 93 [2022-04-06 14:25:41,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:25:41,992 INFO L478 AbstractCegarLoop]: Abstraction has 3190 states and 3612 transitions. [2022-04-06 14:25:41,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 14:25:41,992 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 3612 transitions. [2022-04-06 14:25:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:25:41,996 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:25:41,996 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:25:42,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 14:25:42,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:42,196 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:25:42,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:25:42,197 INFO L85 PathProgramCache]: Analyzing trace with hash -102388934, now seen corresponding path program 69 times [2022-04-06 14:25:42,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:42,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1183738510] [2022-04-06 14:25:42,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:25:42,198 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:25:42,198 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:25:42,198 INFO L85 PathProgramCache]: Analyzing trace with hash -102388934, now seen corresponding path program 70 times [2022-04-06 14:25:42,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:25:42,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147624746] [2022-04-06 14:25:42,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:25:42,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:25:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:42,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:25:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:25:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 14:25:42,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:25:42,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147624746] [2022-04-06 14:25:42,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147624746] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:25:42,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342415435] [2022-04-06 14:25:42,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:25:42,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:25:42,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:25:42,456 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 14:25:42,457 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 14:25:42,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:25:42,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:25:42,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 14:25:42,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:25:43,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:25:43,865 INFO L356 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-04-06 14:25:43,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 36 [2022-04-06 14:25:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 58 proven. 50 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-04-06 14:25:43,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:25:45,820 INFO L356 Elim1Store]: treesize reduction 75, result has 1.3 percent of original size [2022-04-06 14:25:45,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 1 [2022-04-06 14:25:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 65 proven. 14 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-04-06 14:25:45,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342415435] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:25:45,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:25:45,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 19] total 55 [2022-04-06 14:25:45,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:25:45,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1183738510] [2022-04-06 14:25:45,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1183738510] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:25:45,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:25:45,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 14:25:45,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546423833] [2022-04-06 14:25:45,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:25:45,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 14:25:45,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:25:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 14:25:45,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=2648, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 14:25:45,859 INFO L87 Difference]: Start difference. First operand 3190 states and 3612 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 14:26:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:26:17,734 INFO L93 Difference]: Finished difference Result 14219 states and 16276 transitions. [2022-04-06 14:26:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 14:26:17,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 93 [2022-04-06 14:26:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:26:17,752 INFO L225 Difference]: With dead ends: 14219 [2022-04-06 14:26:17,752 INFO L226 Difference]: Without dead ends: 14152 [2022-04-06 14:26:17,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=438, Invalid=4532, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 14:26:17,756 INFO L913 BasicCegarLoop]: 194 mSDtfsCounter, 454 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3302 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:26:17,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 266 Invalid, 3334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3302 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 14:26:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14152 states. [2022-04-06 14:26:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14152 to 3192. [2022-04-06 14:26:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3192 states, 3187 states have (on average 1.1330404769375588) internal successors, (3611), 3187 states have internal predecessors, (3611), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:26:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3192 states to 3192 states and 3615 transitions. [2022-04-06 14:26:24,478 INFO L78 Accepts]: Start accepts. Automaton has 3192 states and 3615 transitions. Word has length 93 [2022-04-06 14:26:24,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:26:24,478 INFO L478 AbstractCegarLoop]: Abstraction has 3192 states and 3615 transitions. [2022-04-06 14:26:24,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 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 14:26:24,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3192 states and 3615 transitions. [2022-04-06 14:26:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 14:26:24,482 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:26:24,482 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:26:24,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-04-06 14:26:24,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 14:26:24,684 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:26:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:26:24,684 INFO L85 PathProgramCache]: Analyzing trace with hash -291944894, now seen corresponding path program 71 times [2022-04-06 14:26:24,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:24,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1194528340] [2022-04-06 14:26:24,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:26:24,686 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:26:24,686 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:26:24,686 INFO L85 PathProgramCache]: Analyzing trace with hash -291944894, now seen corresponding path program 72 times [2022-04-06 14:26:24,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:26:24,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683844737] [2022-04-06 14:26:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:26:24,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:26:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:24,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:26:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 14:26:24,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:26:24,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683844737] [2022-04-06 14:26:24,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683844737] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:26:24,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581804372] [2022-04-06 14:26:24,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:26:24,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:24,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:26:24,873 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 14:26:24,875 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 14:26:25,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 14:26:25,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:26:25,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 14:26:25,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:26:25,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-04-06 14:26:28,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:26:28,938 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:26:28,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-04-06 14:26:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 49 proven. 78 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-04-06 14:26:28,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:26:30,107 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-04-06 14:26:30,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-04-06 14:26:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 52 proven. 55 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-04-06 14:26:30,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581804372] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:26:30,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:26:30,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 21] total 55 [2022-04-06 14:26:30,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:26:30,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1194528340] [2022-04-06 14:26:30,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1194528340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:26:30,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:26:30,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:26:30,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124015544] [2022-04-06 14:26:30,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:26:30,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:26:30,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:30,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:26:30,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2571, Unknown=3, NotChecked=0, Total=2970 [2022-04-06 14:26:30,156 INFO L87 Difference]: Start difference. First operand 3192 states and 3615 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:26:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:26:51,616 INFO L93 Difference]: Finished difference Result 9366 states and 10683 transitions. [2022-04-06 14:26:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:26:51,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-04-06 14:26:51,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:26:51,629 INFO L225 Difference]: With dead ends: 9366 [2022-04-06 14:26:51,630 INFO L226 Difference]: Without dead ends: 9222 [2022-04-06 14:26:51,632 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=535, Invalid=4154, Unknown=3, NotChecked=0, Total=4692 [2022-04-06 14:26:51,632 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 375 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:26:51,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 174 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1653 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:26:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9222 states. [2022-04-06 14:26:58,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9222 to 3192. [2022-04-06 14:26:58,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3192 states, 3187 states have (on average 1.1330404769375588) internal successors, (3611), 3187 states have internal predecessors, (3611), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:26:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3192 states to 3192 states and 3615 transitions. [2022-04-06 14:26:58,430 INFO L78 Accepts]: Start accepts. Automaton has 3192 states and 3615 transitions. Word has length 94 [2022-04-06 14:26:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:26:58,430 INFO L478 AbstractCegarLoop]: Abstraction has 3192 states and 3615 transitions. [2022-04-06 14:26:58,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:26:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3192 states and 3615 transitions. [2022-04-06 14:26:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 14:26:58,434 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:26:58,434 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:26:58,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 14:26:58,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:58,634 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:26:58,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:26:58,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1595514260, now seen corresponding path program 73 times [2022-04-06 14:26:58,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:58,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [11830862] [2022-04-06 14:26:58,635 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:26:58,636 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:26:58,636 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:26:58,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1595514260, now seen corresponding path program 74 times [2022-04-06 14:26:58,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:26:58,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332365107] [2022-04-06 14:26:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:26:58,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:26:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:58,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:26:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 14:26:58,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:26:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332365107] [2022-04-06 14:26:58,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332365107] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:26:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619126143] [2022-04-06 14:26:58,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:26:58,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:58,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:26:58,811 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 14:26:58,822 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 14:26:58,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:26:58,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:26:58,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 14:26:58,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:26:59,580 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:26:59,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 14:26:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 35 proven. 121 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 14:26:59,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:27:00,082 INFO L356 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2022-04-06 14:27:00,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-04-06 14:27:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 14:27:00,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619126143] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:27:00,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:27:00,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 14] total 38 [2022-04-06 14:27:00,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:27:00,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [11830862] [2022-04-06 14:27:00,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [11830862] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:27:00,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:27:00,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:27:00,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809548404] [2022-04-06 14:27:00,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:27:00,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:27:00,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:27:00,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:27:00,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:27:00,381 INFO L87 Difference]: Start difference. First operand 3192 states and 3615 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 14:27:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:27:12,497 INFO L93 Difference]: Finished difference Result 5544 states and 6260 transitions. [2022-04-06 14:27:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:27:12,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 95 [2022-04-06 14:27:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:27:12,504 INFO L225 Difference]: With dead ends: 5544 [2022-04-06 14:27:12,504 INFO L226 Difference]: Without dead ends: 5175 [2022-04-06 14:27:12,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=224, Invalid=2226, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 14:27:12,505 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 327 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:27:12,506 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 100 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:27:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5175 states. [2022-04-06 14:27:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5175 to 3442. [2022-04-06 14:27:19,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3437 states have (on average 1.1309281350014548) internal successors, (3887), 3437 states have internal predecessors, (3887), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:27:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 3891 transitions. [2022-04-06 14:27:19,844 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 3891 transitions. Word has length 95 [2022-04-06 14:27:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:27:19,844 INFO L478 AbstractCegarLoop]: Abstraction has 3442 states and 3891 transitions. [2022-04-06 14:27:19,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 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 14:27:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 3891 transitions. [2022-04-06 14:27:19,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 14:27:19,848 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:27:19,848 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:27:19,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 14:27:20,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 14:27:20,049 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:27:20,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:27:20,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1917202559, now seen corresponding path program 75 times [2022-04-06 14:27:20,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:27:20,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1477752865] [2022-04-06 14:27:20,050 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:27:20,050 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:27:20,050 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:27:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1917202559, now seen corresponding path program 76 times [2022-04-06 14:27:20,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:27:20,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464684626] [2022-04-06 14:27:20,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:27:20,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:27:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:27:20,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:27:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:27:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 14:27:20,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:27:20,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464684626] [2022-04-06 14:27:20,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464684626] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:27:20,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678744456] [2022-04-06 14:27:20,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:27:20,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:27:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:27:20,305 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 14:27:20,305 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 14:27:20,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:27:20,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:27:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 14:27:20,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:27:21,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:27:21,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:27:21,911 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-04-06 14:27:21,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 20 [2022-04-06 14:27:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 60 proven. 26 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-04-06 14:27:21,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:27:23,272 INFO L356 Elim1Store]: treesize reduction 75, result has 1.3 percent of original size [2022-04-06 14:27:23,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 1 [2022-04-06 14:27:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 64 proven. 9 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-04-06 14:27:23,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678744456] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:27:23,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:27:23,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 18] total 55 [2022-04-06 14:27:23,310 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:27:23,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1477752865] [2022-04-06 14:27:23,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1477752865] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:27:23,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:27:23,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 14:27:23,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157157350] [2022-04-06 14:27:23,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:27:23,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 14:27:23,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:27:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 14:27:23,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2638, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 14:27:23,311 INFO L87 Difference]: Start difference. First operand 3442 states and 3891 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:28:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:28:00,830 INFO L93 Difference]: Finished difference Result 15500 states and 17732 transitions. [2022-04-06 14:28:00,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 14:28:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-04-06 14:28:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:28:00,851 INFO L225 Difference]: With dead ends: 15500 [2022-04-06 14:28:00,851 INFO L226 Difference]: Without dead ends: 15433 [2022-04-06 14:28:00,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=451, Invalid=4661, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 14:28:00,856 INFO L913 BasicCegarLoop]: 213 mSDtfsCounter, 457 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 4157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:28:00,856 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 295 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 14:28:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15433 states. [2022-04-06 14:28:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15433 to 3444. [2022-04-06 14:28:08,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 3439 states have (on average 1.1311427740622273) internal successors, (3890), 3439 states have internal predecessors, (3890), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:28:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 3894 transitions. [2022-04-06 14:28:08,352 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 3894 transitions. Word has length 95 [2022-04-06 14:28:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:28:08,353 INFO L478 AbstractCegarLoop]: Abstraction has 3444 states and 3894 transitions. [2022-04-06 14:28:08,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:28:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 3894 transitions. [2022-04-06 14:28:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-06 14:28:08,356 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:28:08,356 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:28:08,374 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 14:28:08,557 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 14:28:08,557 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:28:08,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:28:08,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2109118051, now seen corresponding path program 77 times [2022-04-06 14:28:08,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:08,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1644646221] [2022-04-06 14:28:08,559 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:28:08,559 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:28:08,559 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:28:08,559 INFO L85 PathProgramCache]: Analyzing trace with hash -2109118051, now seen corresponding path program 78 times [2022-04-06 14:28:08,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:28:08,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118692059] [2022-04-06 14:28:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:28:08,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:28:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:08,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:28:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 14:28:08,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:28:08,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118692059] [2022-04-06 14:28:08,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118692059] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:28:08,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754671348] [2022-04-06 14:28:08,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:28:08,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:28:08,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:28:08,755 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 14:28:08,756 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 14:28:09,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 14:28:09,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:28:09,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 14:28:09,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:28:09,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:28:09,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-04-06 14:28:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 59 proven. 20 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-04-06 14:28:09,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:28:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 50 proven. 20 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 14:28:09,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754671348] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:28:09,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:28:09,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 9] total 32 [2022-04-06 14:28:09,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:28:09,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1644646221] [2022-04-06 14:28:09,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1644646221] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:28:09,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:28:09,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:28:09,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223302459] [2022-04-06 14:28:09,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:28:09,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:28:09,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:09,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:28:09,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2022-04-06 14:28:09,874 INFO L87 Difference]: Start difference. First operand 3444 states and 3894 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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 14:28:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:28:35,731 INFO L93 Difference]: Finished difference Result 10647 states and 12139 transitions. [2022-04-06 14:28:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 14:28:35,732 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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 96 [2022-04-06 14:28:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:28:35,743 INFO L225 Difference]: With dead ends: 10647 [2022-04-06 14:28:35,743 INFO L226 Difference]: Without dead ends: 10503 [2022-04-06 14:28:35,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=1997, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 14:28:35,746 INFO L913 BasicCegarLoop]: 141 mSDtfsCounter, 384 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2232 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 14:28:35,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 203 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2232 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 14:28:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10503 states. [2022-04-06 14:28:43,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10503 to 3444. [2022-04-06 14:28:43,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 3439 states have (on average 1.1311427740622273) internal successors, (3890), 3439 states have internal predecessors, (3890), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:28:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 3894 transitions. [2022-04-06 14:28:43,343 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 3894 transitions. Word has length 96 [2022-04-06 14:28:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:28:43,343 INFO L478 AbstractCegarLoop]: Abstraction has 3444 states and 3894 transitions. [2022-04-06 14:28:43,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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 14:28:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 3894 transitions. [2022-04-06 14:28:43,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 14:28:43,346 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:28:43,346 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:28:43,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 14:28:43,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 14:28:43,547 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:28:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:28:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1097721241, now seen corresponding path program 79 times [2022-04-06 14:28:43,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:43,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [865758206] [2022-04-06 14:28:43,548 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:28:43,548 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:28:43,548 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:28:43,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1097721241, now seen corresponding path program 80 times [2022-04-06 14:28:43,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:28:43,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580032468] [2022-04-06 14:28:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:28:43,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:28:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:43,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:28:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:28:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 14:28:43,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:28:43,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580032468] [2022-04-06 14:28:43,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580032468] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:28:43,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361888892] [2022-04-06 14:28:43,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:28:43,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:28:43,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:28:43,767 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 14:28:43,777 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 14:28:43,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:28:43,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:28:43,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 14:28:43,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:28:44,657 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:28:44,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 14:28:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 35 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 14:28:44,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:28:45,189 INFO L356 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2022-04-06 14:28:45,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-04-06 14:28:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-04-06 14:28:45,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361888892] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:28:45,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:28:45,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 39 [2022-04-06 14:28:45,566 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:28:45,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [865758206] [2022-04-06 14:28:45,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [865758206] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:28:45,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:28:45,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:28:45,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287763498] [2022-04-06 14:28:45,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:28:45,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:28:45,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:28:45,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:28:45,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1341, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 14:28:45,567 INFO L87 Difference]: Start difference. First operand 3444 states and 3894 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 14:29:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:29:01,167 INFO L93 Difference]: Finished difference Result 6717 states and 7608 transitions. [2022-04-06 14:29:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:29:01,167 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 97 [2022-04-06 14:29:01,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:29:01,174 INFO L225 Difference]: With dead ends: 6717 [2022-04-06 14:29:01,174 INFO L226 Difference]: Without dead ends: 6348 [2022-04-06 14:29:01,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=2338, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 14:29:01,176 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 307 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:29:01,176 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 123 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:29:01,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6348 states. [2022-04-06 14:29:08,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6348 to 3444. [2022-04-06 14:29:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 3439 states have (on average 1.1311427740622273) internal successors, (3890), 3439 states have internal predecessors, (3890), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:29:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 3894 transitions. [2022-04-06 14:29:08,835 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 3894 transitions. Word has length 97 [2022-04-06 14:29:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:29:08,835 INFO L478 AbstractCegarLoop]: Abstraction has 3444 states and 3894 transitions. [2022-04-06 14:29:08,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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 14:29:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 3894 transitions. [2022-04-06 14:29:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 14:29:08,840 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:29:08,840 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:29:08,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 14:29:09,040 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 14:29:09,040 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:29:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:29:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1419409540, now seen corresponding path program 81 times [2022-04-06 14:29:09,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:09,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1139745535] [2022-04-06 14:29:09,042 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:29:09,042 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:29:09,042 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:29:09,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1419409540, now seen corresponding path program 82 times [2022-04-06 14:29:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:29:09,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909338420] [2022-04-06 14:29:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:29:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:29:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:09,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:29:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:29:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 14:29:09,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:29:09,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909338420] [2022-04-06 14:29:09,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909338420] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:29:09,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992006236] [2022-04-06 14:29:09,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:29:09,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:29:09,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:29:09,330 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 14:29:09,331 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 14:29:09,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:29:09,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:29:09,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 14:29:09,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:29:11,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:29:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:29:11,059 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-04-06 14:29:11,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 20 [2022-04-06 14:29:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 61 proven. 28 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-04-06 14:29:11,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:29:12,549 INFO L356 Elim1Store]: treesize reduction 75, result has 1.3 percent of original size [2022-04-06 14:29:12,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 1 [2022-04-06 14:29:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 67 proven. 9 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-04-06 14:29:12,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992006236] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:29:12,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:29:12,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 19] total 58 [2022-04-06 14:29:12,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:29:12,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1139745535] [2022-04-06 14:29:12,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1139745535] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:29:12,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:29:12,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 14:29:12,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595341343] [2022-04-06 14:29:12,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:29:12,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 14:29:12,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:29:12,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 14:29:12,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=2938, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 14:29:12,592 INFO L87 Difference]: Start difference. First operand 3444 states and 3894 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:29:55,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:29:55,939 INFO L93 Difference]: Finished difference Result 16781 states and 19188 transitions. [2022-04-06 14:29:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 14:29:55,940 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-04-06 14:29:55,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:29:55,962 INFO L225 Difference]: With dead ends: 16781 [2022-04-06 14:29:55,962 INFO L226 Difference]: Without dead ends: 16714 [2022-04-06 14:29:55,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=496, Invalid=5204, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 14:29:55,969 INFO L913 BasicCegarLoop]: 232 mSDtfsCounter, 521 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4477 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 4512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 14:29:55,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 314 Invalid, 4512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4477 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 14:29:55,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16714 states. [2022-04-06 14:30:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16714 to 3446. [2022-04-06 14:30:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3441 states have (on average 1.1313571636152282) internal successors, (3893), 3441 states have internal predecessors, (3893), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:30:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 3897 transitions. [2022-04-06 14:30:03,850 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 3897 transitions. Word has length 97 [2022-04-06 14:30:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:30:03,850 INFO L478 AbstractCegarLoop]: Abstraction has 3446 states and 3897 transitions. [2022-04-06 14:30:03,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:30:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 3897 transitions. [2022-04-06 14:30:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 14:30:03,854 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:30:03,854 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:30:03,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 14:30:04,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:30:04,055 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:30:04,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:30:04,055 INFO L85 PathProgramCache]: Analyzing trace with hash -360832456, now seen corresponding path program 83 times [2022-04-06 14:30:04,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:30:04,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1748656274] [2022-04-06 14:30:04,056 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:30:04,056 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:30:04,056 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:30:04,056 INFO L85 PathProgramCache]: Analyzing trace with hash -360832456, now seen corresponding path program 84 times [2022-04-06 14:30:04,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:30:04,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275107804] [2022-04-06 14:30:04,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:30:04,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:30:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:30:04,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:30:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:30:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 14:30:04,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:30:04,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275107804] [2022-04-06 14:30:04,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275107804] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:30:04,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67159933] [2022-04-06 14:30:04,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:30:04,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:30:04,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:30:04,288 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 14:30:04,289 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 14:30:05,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 14:30:05,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:30:05,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 118 conjunts are in the unsatisfiable core [2022-04-06 14:30:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:30:06,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:30:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 68 proven. 25 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-04-06 14:30:06,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:30:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 68 proven. 116 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-04-06 14:30:11,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67159933] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:30:11,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:30:11,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 37] total 65 [2022-04-06 14:30:11,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:30:11,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1748656274] [2022-04-06 14:30:11,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1748656274] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:30:11,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:30:11,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 14:30:11,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759896615] [2022-04-06 14:30:11,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:30:11,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 14:30:11,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:30:11,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 14:30:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3945, Unknown=1, NotChecked=0, Total=4160 [2022-04-06 14:30:11,885 INFO L87 Difference]: Start difference. First operand 3446 states and 3897 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:30:43,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:30:43,020 INFO L93 Difference]: Finished difference Result 11928 states and 13595 transitions. [2022-04-06 14:30:43,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 14:30:43,020 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-04-06 14:30:43,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:30:43,034 INFO L225 Difference]: With dead ends: 11928 [2022-04-06 14:30:43,034 INFO L226 Difference]: Without dead ends: 11784 [2022-04-06 14:30:43,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=309, Invalid=6332, Unknown=1, NotChecked=0, Total=6642 [2022-04-06 14:30:43,037 INFO L913 BasicCegarLoop]: 151 mSDtfsCounter, 486 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2465 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 2509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:30:43,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 218 Invalid, 2509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2465 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 14:30:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11784 states. [2022-04-06 14:30:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11784 to 3446. [2022-04-06 14:30:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3441 states have (on average 1.1313571636152282) internal successors, (3893), 3441 states have internal predecessors, (3893), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:30:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 3897 transitions. [2022-04-06 14:30:50,820 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 3897 transitions. Word has length 98 [2022-04-06 14:30:50,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:30:50,820 INFO L478 AbstractCegarLoop]: Abstraction has 3446 states and 3897 transitions. [2022-04-06 14:30:50,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:30:50,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 3897 transitions. [2022-04-06 14:30:50,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 14:30:50,823 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:30:50,823 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:30:50,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 14:30:51,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:30:51,024 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:30:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:30:51,024 INFO L85 PathProgramCache]: Analyzing trace with hash -540000162, now seen corresponding path program 85 times [2022-04-06 14:30:51,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:30:51,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [998861596] [2022-04-06 14:30:51,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:30:51,025 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:30:51,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:30:51,025 INFO L85 PathProgramCache]: Analyzing trace with hash -540000162, now seen corresponding path program 86 times [2022-04-06 14:30:51,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:30:51,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334024834] [2022-04-06 14:30:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:30:51,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:30:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:30:51,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:30:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:30:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 14:30:51,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:30:51,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334024834] [2022-04-06 14:30:51,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334024834] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:30:51,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110906789] [2022-04-06 14:30:51,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:30:51,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:30:51,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:30:51,197 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 14:30:51,200 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 14:30:51,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:30:51,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:30:51,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 14:30:51,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:30:52,044 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:30:52,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 14:30:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 35 proven. 123 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-04-06 14:30:52,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:30:52,597 INFO L356 Elim1Store]: treesize reduction 41, result has 74.2 percent of original size [2022-04-06 14:30:52,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 143 [2022-04-06 14:30:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-04-06 14:30:52,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110906789] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:30:52,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:30:52,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 14] total 41 [2022-04-06 14:30:52,969 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:30:52,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [998861596] [2022-04-06 14:30:52,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [998861596] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:30:52,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:30:52,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:30:52,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356567412] [2022-04-06 14:30:52,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:30:52,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:30:52,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:30:52,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:30:52,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1488, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 14:30:52,970 INFO L87 Difference]: Start difference. First operand 3446 states and 3897 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:31:13,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:31:13,216 INFO L93 Difference]: Finished difference Result 7998 states and 9064 transitions. [2022-04-06 14:31:13,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 14:31:13,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-04-06 14:31:13,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:31:13,225 INFO L225 Difference]: With dead ends: 7998 [2022-04-06 14:31:13,225 INFO L226 Difference]: Without dead ends: 7629 [2022-04-06 14:31:13,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 170 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=252, Invalid=2940, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 14:31:13,228 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 445 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:31:13,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 142 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:31:13,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7629 states. [2022-04-06 14:31:21,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7629 to 3446. [2022-04-06 14:31:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3446 states, 3441 states have (on average 1.1313571636152282) internal successors, (3893), 3441 states have internal predecessors, (3893), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:31:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3446 states to 3446 states and 3897 transitions. [2022-04-06 14:31:21,192 INFO L78 Accepts]: Start accepts. Automaton has 3446 states and 3897 transitions. Word has length 99 [2022-04-06 14:31:21,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:31:21,192 INFO L478 AbstractCegarLoop]: Abstraction has 3446 states and 3897 transitions. [2022-04-06 14:31:21,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:31:21,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3446 states and 3897 transitions. [2022-04-06 14:31:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 14:31:21,195 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:31:21,195 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:31:21,212 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 14:31:21,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:31:21,396 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:31:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:31:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash -218311863, now seen corresponding path program 87 times [2022-04-06 14:31:21,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:31:21,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1176967926] [2022-04-06 14:31:21,397 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:31:21,397 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:31:21,397 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:31:21,397 INFO L85 PathProgramCache]: Analyzing trace with hash -218311863, now seen corresponding path program 88 times [2022-04-06 14:31:21,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:31:21,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540689229] [2022-04-06 14:31:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:31:21,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:31:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:31:21,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:31:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:31:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-04-06 14:31:21,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:31:21,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540689229] [2022-04-06 14:31:21,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540689229] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:31:21,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284252876] [2022-04-06 14:31:21,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:31:21,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:31:21,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:31:21,669 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 14:31:21,669 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 14:31:21,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:31:21,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:31:21,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 14:31:21,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:31:23,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:31:23,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:31:23,565 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-04-06 14:31:23,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 20 [2022-04-06 14:31:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 61 proven. 58 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-04-06 14:31:23,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:31:25,135 INFO L356 Elim1Store]: treesize reduction 75, result has 1.3 percent of original size [2022-04-06 14:31:25,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 1 [2022-04-06 14:31:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 68 proven. 9 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-04-06 14:31:25,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284252876] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:31:25,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:31:25,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 19] total 60 [2022-04-06 14:31:25,178 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:31:25,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1176967926] [2022-04-06 14:31:25,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1176967926] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:31:25,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:31:25,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 14:31:25,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110961905] [2022-04-06 14:31:25,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:31:25,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 14:31:25,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:31:25,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 14:31:25,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=3161, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 14:31:25,180 INFO L87 Difference]: Start difference. First operand 3446 states and 3897 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:32:15,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:15,751 INFO L93 Difference]: Finished difference Result 18062 states and 20644 transitions. [2022-04-06 14:32:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 14:32:15,751 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-04-06 14:32:15,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:15,776 INFO L225 Difference]: With dead ends: 18062 [2022-04-06 14:32:15,776 INFO L226 Difference]: Without dead ends: 17995 [2022-04-06 14:32:15,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=513, Invalid=5649, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 14:32:15,782 INFO L913 BasicCegarLoop]: 251 mSDtfsCounter, 537 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5141 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 5177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 5141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:15,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 338 Invalid, 5177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 5141 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 14:32:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17995 states. [2022-04-06 14:32:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17995 to 3448. [2022-04-06 14:32:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3443 states have (on average 1.1315713040952657) internal successors, (3896), 3443 states have internal predecessors, (3896), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:32:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 3900 transitions. [2022-04-06 14:32:24,141 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 3900 transitions. Word has length 99 [2022-04-06 14:32:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:24,141 INFO L478 AbstractCegarLoop]: Abstraction has 3448 states and 3900 transitions. [2022-04-06 14:32:24,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:32:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 3900 transitions. [2022-04-06 14:32:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 14:32:24,145 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:24,145 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:24,163 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 14:32:24,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 14:32:24,345 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash 409411603, now seen corresponding path program 89 times [2022-04-06 14:32:24,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:24,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1706732835] [2022-04-06 14:32:24,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:24,347 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:24,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash 409411603, now seen corresponding path program 90 times [2022-04-06 14:32:24,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:24,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546239508] [2022-04-06 14:32:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:24,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:24,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 14:32:24,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:24,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546239508] [2022-04-06 14:32:24,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546239508] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:24,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398465100] [2022-04-06 14:32:24,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:32:24,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:24,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:24,575 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 14:32:24,575 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 14:32:30,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 14:32:30,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:30,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 14:32:30,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:30,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 14:32:30,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-04-06 14:32:30,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-04-06 14:32:30,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-04-06 14:32:30,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-04-06 14:32:30,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 51 [2022-04-06 14:32:30,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 75 [2022-04-06 14:32:35,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:32:35,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:32:35,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 16 [2022-04-06 14:32:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 46 proven. 92 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-04-06 14:32:35,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:56,765 INFO L356 Elim1Store]: treesize reduction 258, result has 15.7 percent of original size [2022-04-06 14:32:56,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 353 treesize of output 345 [2022-04-06 14:32:56,810 INFO L356 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2022-04-06 14:32:56,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 1 [2022-04-06 14:32:57,359 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-04-06 14:32:59,402 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_div_aux_mod_main_~n_caracter~0_35_46 Int) (aux_mod_aux_mod_main_~n_caracter~0_35_46 Int)) (let ((.cse12 (+ aux_mod_aux_mod_main_~n_caracter~0_35_46 (* aux_div_aux_mod_main_~n_caracter~0_35_46 4294967296)))) (or (and (forall ((v_prenex_3 Int) (v_arrayElimArr_4 (Array Int Int)) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int)) (let ((.cse2 (+ |c_main_~#input_string~0.offset| 1))) (let ((.cse0 (store (store v_arrayElimArr_4 .cse2 v_DerPreprocessor_3) (+ (mod v_prenex_3 4294967296) (- 4294967296) |c_main_~#input_string~0.offset|) v_DerPreprocessor_4)) (.cse1 (select (select (store |c_#memory_int| |c_main_~#input_string~0.base| v_arrayElimArr_4) |c_main_~#vogal_array~0.base|) |c_main_~#vogal_array~0.offset|))) (or (not (= (select .cse0 (+ (mod aux_mod_aux_mod_main_~n_caracter~0_35_46 4294967296) |c_main_~#input_string~0.offset|)) 0)) (not (= .cse1 (select .cse0 (+ 2 |c_main_~#input_string~0.offset|)))) (not (= .cse1 (select v_arrayElimArr_4 .cse2))))))) (forall ((aux_div_aux_mod_aux_mod_main_~i~0_26_37_48 Int) (v_prenex_3 Int) (v_arrayElimArr_4 (Array Int Int)) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int) (aux_div_aux_mod_main_~i~0_26_37 Int) (aux_mod_aux_mod_aux_mod_main_~i~0_26_37_48 Int)) (let ((.cse7 (* 4294967296 aux_div_aux_mod_aux_mod_main_~i~0_26_37_48))) (let ((.cse3 (+ .cse7 aux_mod_aux_mod_aux_mod_main_~i~0_26_37_48 (* aux_div_aux_mod_main_~i~0_26_37 4294967296))) (.cse5 (select (select (store |c_#memory_int| |c_main_~#input_string~0.base| v_arrayElimArr_4) |c_main_~#vogal_array~0.base|) |c_main_~#vogal_array~0.offset|)) (.cse6 (store (store v_arrayElimArr_4 (+ (mod aux_mod_aux_mod_aux_mod_main_~i~0_26_37_48 4294967296) |c_main_~#input_string~0.offset|) v_DerPreprocessor_3) (+ (mod v_prenex_3 4294967296) (- 4294967296) |c_main_~#input_string~0.offset|) v_DerPreprocessor_4)) (.cse4 (+ .cse7 aux_mod_aux_mod_aux_mod_main_~i~0_26_37_48))) (or (< .cse3 0) (= .cse4 2) (> 0 aux_mod_aux_mod_aux_mod_main_~i~0_26_37_48) (< 2147483647 .cse3) (not (= .cse5 (select .cse6 (+ |c_main_~#input_string~0.offset| 1)))) (>= aux_mod_aux_mod_aux_mod_main_~i~0_26_37_48 4294967296) (not (= (select .cse6 (+ (mod aux_mod_aux_mod_main_~n_caracter~0_35_46 4294967296) |c_main_~#input_string~0.offset|)) 0)) (= aux_mod_aux_mod_aux_mod_main_~i~0_26_37_48 1) (<= 4294967296 .cse4) (not (= .cse5 (select .cse6 (+ 2 |c_main_~#input_string~0.offset|)))) (< .cse4 0))))) (forall ((v_arrayElimArr_3 (Array Int Int))) (let ((.cse8 (select (select (store |c_#memory_int| |c_main_~#input_string~0.base| v_arrayElimArr_3) |c_main_~#vogal_array~0.base|) |c_main_~#vogal_array~0.offset|))) (or (not (= .cse8 (select v_arrayElimArr_3 (+ |c_main_~#input_string~0.offset| 1)))) (not (= (select v_arrayElimArr_3 (+ (mod aux_mod_aux_mod_main_~n_caracter~0_35_46 4294967296) |c_main_~#input_string~0.offset|)) 0)) (not (= .cse8 (select v_arrayElimArr_3 (+ 2 |c_main_~#input_string~0.offset|))))))) (forall ((v_prenex_3 Int) (v_arrayElimArr_4 (Array Int Int)) (v_DerPreprocessor_4 Int) (v_DerPreprocessor_3 Int)) (let ((.cse11 (+ 2 |c_main_~#input_string~0.offset|))) (let ((.cse10 (select (select (store |c_#memory_int| |c_main_~#input_string~0.base| v_arrayElimArr_4) |c_main_~#vogal_array~0.base|) |c_main_~#vogal_array~0.offset|)) (.cse9 (select v_arrayElimArr_4 .cse11))) (or (not (= .cse9 0)) (not (= .cse10 (select (store (store v_arrayElimArr_4 .cse11 v_DerPreprocessor_3) (+ (mod v_prenex_3 4294967296) (- 4294967296) |c_main_~#input_string~0.offset|) v_DerPreprocessor_4) (+ |c_main_~#input_string~0.offset| 1)))) (not (= .cse10 .cse9))))))) (<= 4294967296 aux_mod_aux_mod_main_~n_caracter~0_35_46) (< .cse12 0) (< 2 .cse12) (<= aux_mod_aux_mod_main_~n_caracter~0_35_46 1)))) is different from false [2022-04-06 14:33:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 42 proven. 80 refuted. 5 times theorem prover too weak. 133 trivial. 9 not checked. [2022-04-06 14:33:19,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398465100] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:33:19,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:33:19,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30, 28] total 73 [2022-04-06 14:33:19,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:33:19,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1706732835] [2022-04-06 14:33:19,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1706732835] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:33:19,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:33:19,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 14:33:19,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546960128] [2022-04-06 14:33:19,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:33:19,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 14:33:19,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:33:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 14:33:19,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=4418, Unknown=14, NotChecked=140, Total=5256 [2022-04-06 14:33:19,542 INFO L87 Difference]: Start difference. First operand 3448 states and 3900 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)