/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/loop-acceleration/array_2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 14:21:07,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 14:21:07,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 14:21:07,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 14:21:07,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 14:21:07,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 14:21:07,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 14:21:07,583 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 14:21:07,589 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 14:21:07,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 14:21:07,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 14:21:07,590 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 14:21:07,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 14:21:07,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 14:21:07,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 14:21:07,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 14:21:07,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 14:21:07,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 14:21:07,591 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 14:21:07,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 14:21:07,591 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 14:21:07,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 14:21:07,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 14:21:07,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 14:21:07,591 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 14:21:07,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 14:21:07,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:21:07,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 14:21:07,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 14:21:07,592 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 14:21:07,592 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 14:21:07,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 14:21:07,592 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 14:21:07,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 14:21:07,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 14:21:07,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 14:21:07,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 14:21:07,789 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 14:21:07,799 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 14:21:07,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i [2022-04-06 14:21:07,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e94698c/3e0c71bb6aee4ed79eae3926acd4b9fd/FLAG4371eedd1 [2022-04-06 14:21:08,212 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 14:21:08,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i [2022-04-06 14:21:08,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e94698c/3e0c71bb6aee4ed79eae3926acd4b9fd/FLAG4371eedd1 [2022-04-06 14:21:08,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90e94698c/3e0c71bb6aee4ed79eae3926acd4b9fd [2022-04-06 14:21:08,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 14:21:08,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 14:21:08,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 14:21:08,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 14:21:08,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 14:21:08,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:21:08" (1/1) ... [2022-04-06 14:21:08,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47cd2daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:21:08, skipping insertion in model container [2022-04-06 14:21:08,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:21:08" (1/1) ... [2022-04-06 14:21:08,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 14:21:08,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 14:21:08,392 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i[849,862] [2022-04-06 14:21:08,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:21:08,410 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 14:21:08,421 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i[849,862] [2022-04-06 14:21:08,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:21:08,441 INFO L208 MainTranslator]: Completed translation [2022-04-06 14:21:08,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:21:08 WrapperNode [2022-04-06 14:21:08,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 14:21:08,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 14:21:08,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 14:21:08,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 14:21:08,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:21:08" (1/1) ... [2022-04-06 14:21:08,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:21:08" (1/1) ... [2022-04-06 14:21:08,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:21:08" (1/1) ... [2022-04-06 14:21:08,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:21:08" (1/1) ... [2022-04-06 14:21:08,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:21:08" (1/1) ... [2022-04-06 14:21:08,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:21:08" (1/1) ... [2022-04-06 14:21:08,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:21:08" (1/1) ... [2022-04-06 14:21:08,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 14:21:08,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 14:21:08,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 14:21:08,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 14:21:08,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:21:08" (1/1) ... [2022-04-06 14:21:08,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:21:08,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:08,502 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 14:21:08,504 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 14:21:08,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 14:21:08,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 14:21:08,525 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 14:21:08,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 14:21:08,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 14:21:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 14:21:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 14:21:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 14:21:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 14:21:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 14:21:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 14:21:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 14:21:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 14:21:08,571 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 14:21:08,572 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 14:21:08,652 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 14:21:08,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 14:21:08,658 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 14:21:08,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:21:08 BoogieIcfgContainer [2022-04-06 14:21:08,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 14:21:08,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 14:21:08,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 14:21:08,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 14:21:08,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 02:21:08" (1/3) ... [2022-04-06 14:21:08,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de8b9b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:21:08, skipping insertion in model container [2022-04-06 14:21:08,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:21:08" (2/3) ... [2022-04-06 14:21:08,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de8b9b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:21:08, skipping insertion in model container [2022-04-06 14:21:08,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:21:08" (3/3) ... [2022-04-06 14:21:08,666 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1.i [2022-04-06 14:21:08,670 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 14:21:08,670 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 14:21:08,705 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 14:21:08,710 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 14:21:08,711 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 14:21:08,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 14:21:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 14:21:08,733 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:08,734 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:08,734 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1954431608, now seen corresponding path program 1 times [2022-04-06 14:21:08,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:08,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [794875038] [2022-04-06 14:21:08,761 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:21:08,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1954431608, now seen corresponding path program 2 times [2022-04-06 14:21:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:08,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252226565] [2022-04-06 14:21:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:08,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:08,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:08,919 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 14:21:08,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:08,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252226565] [2022-04-06 14:21:08,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252226565] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:08,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:08,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:21:08,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:08,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [794875038] [2022-04-06 14:21:08,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [794875038] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:08,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:08,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 14:21:08,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733279254] [2022-04-06 14:21:08,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:08,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 14:21:08,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:08,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 14:21:08,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 14:21:08,954 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:09,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:09,031 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-04-06 14:21:09,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 14:21:09,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 14:21:09,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:09,036 INFO L225 Difference]: With dead ends: 40 [2022-04-06 14:21:09,036 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 14:21:09,038 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 14:21:09,041 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 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 14:21:09,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:21:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 14:21:09,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 14:21:09,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:09,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-04-06 14:21:09,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2022-04-06 14:21:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:09,071 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-04-06 14:21:09,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-04-06 14:21:09,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 14:21:09,072 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:09,072 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:09,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 14:21:09,073 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:09,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:09,073 INFO L85 PathProgramCache]: Analyzing trace with hash 301833364, now seen corresponding path program 1 times [2022-04-06 14:21:09,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:09,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282937848] [2022-04-06 14:21:09,074 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:21:09,074 INFO L85 PathProgramCache]: Analyzing trace with hash 301833364, now seen corresponding path program 2 times [2022-04-06 14:21:09,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:09,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568041831] [2022-04-06 14:21:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:09,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:09,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:09,121 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 14:21:09,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:09,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568041831] [2022-04-06 14:21:09,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568041831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:09,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:09,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:21:09,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:09,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282937848] [2022-04-06 14:21:09,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282937848] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:09,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:09,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:21:09,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942189413] [2022-04-06 14:21:09,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:09,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:21:09,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:09,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:21:09,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 14:21:09,124 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:09,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:09,160 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-04-06 14:21:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:21:09,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 14:21:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:09,164 INFO L225 Difference]: With dead ends: 30 [2022-04-06 14:21:09,164 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 14:21:09,165 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 14:21:09,165 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:09,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:21:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 14:21:09,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-04-06 14:21:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-04-06 14:21:09,170 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-04-06 14:21:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:09,171 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-04-06 14:21:09,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:09,171 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-04-06 14:21:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 14:21:09,171 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:09,171 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 14:21:09,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 14:21:09,172 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1319589272, now seen corresponding path program 1 times [2022-04-06 14:21:09,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:09,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [611335146] [2022-04-06 14:21:09,191 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:09,191 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:09,191 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:09,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1319589272, now seen corresponding path program 2 times [2022-04-06 14:21:09,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:09,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295114350] [2022-04-06 14:21:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:09,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:09,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:21:09,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:09,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295114350] [2022-04-06 14:21:09,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295114350] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:09,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3306662] [2022-04-06 14:21:09,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:21:09,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:09,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:09,266 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 14:21:09,269 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 14:21:09,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:21:09,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:09,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 14:21:09,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:21:09,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 14:21:09,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3306662] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:09,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:09,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 14:21:09,487 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:09,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [611335146] [2022-04-06 14:21:09,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [611335146] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:09,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:09,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:21:09,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963062827] [2022-04-06 14:21:09,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:09,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 14:21:09,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:09,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 14:21:09,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 14:21:09,491 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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 14:21:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:09,543 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-04-06 14:21:09,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 14:21:09,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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 14:21:09,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:09,545 INFO L225 Difference]: With dead ends: 35 [2022-04-06 14:21:09,545 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 14:21:09,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 14:21:09,547 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:09,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 21 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:21:09,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 14:21:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-04-06 14:21:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:09,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-04-06 14:21:09,555 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2022-04-06 14:21:09,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:09,555 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-04-06 14:21:09,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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 14:21:09,555 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-04-06 14:21:09,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 14:21:09,556 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:09,557 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:09,589 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 14:21:09,773 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 14:21:09,774 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:09,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:09,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1327365276, now seen corresponding path program 3 times [2022-04-06 14:21:09,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:09,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [456374130] [2022-04-06 14:21:09,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:09,777 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:09,777 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:09,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1327365276, now seen corresponding path program 4 times [2022-04-06 14:21:09,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:09,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149790678] [2022-04-06 14:21:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:09,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:09,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:21:09,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:09,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149790678] [2022-04-06 14:21:09,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149790678] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:09,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235749375] [2022-04-06 14:21:09,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:21:09,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:09,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:09,847 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 14:21:09,849 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 14:21:09,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:21:09,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:09,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 14:21:09,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:21:09,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:21:10,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235749375] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:10,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:10,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 14:21:10,035 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:10,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [456374130] [2022-04-06 14:21:10,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [456374130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:10,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:10,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:21:10,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212397209] [2022-04-06 14:21:10,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:10,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:21:10,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:10,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:21:10,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 14:21:10,042 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:10,105 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-04-06 14:21:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:21:10,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 14:21:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:10,106 INFO L225 Difference]: With dead ends: 41 [2022-04-06 14:21:10,106 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 14:21:10,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 14:21:10,114 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:10,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 21 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:21:10,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 14:21:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-04-06 14:21:10,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-04-06 14:21:10,127 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2022-04-06 14:21:10,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:10,127 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-04-06 14:21:10,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:10,127 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-04-06 14:21:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 14:21:10,128 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:10,128 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:10,147 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 14:21:10,344 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 14:21:10,345 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:10,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2060021344, now seen corresponding path program 5 times [2022-04-06 14:21:10,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:10,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1090932093] [2022-04-06 14:21:10,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:10,347 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:10,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:10,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2060021344, now seen corresponding path program 6 times [2022-04-06 14:21:10,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:10,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347083075] [2022-04-06 14:21:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:10,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:10,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 14:21:10,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347083075] [2022-04-06 14:21:10,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347083075] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:10,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437987022] [2022-04-06 14:21:10,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:21:10,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:10,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:10,455 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 14:21:10,459 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 14:21:10,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 14:21:10,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:10,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 14:21:10,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 14:21:10,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 14:21:10,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437987022] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:10,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:10,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 14:21:10,616 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:10,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1090932093] [2022-04-06 14:21:10,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1090932093] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:10,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:10,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:21:10,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506267730] [2022-04-06 14:21:10,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:10,616 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:21:10,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:10,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:21:10,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:21:10,617 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:10,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:10,671 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-04-06 14:21:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:21:10,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 14:21:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:10,672 INFO L225 Difference]: With dead ends: 47 [2022-04-06 14:21:10,672 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 14:21:10,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-04-06 14:21:10,673 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:10,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 26 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:21:10,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 14:21:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-04-06 14:21:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:10,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-04-06 14:21:10,677 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2022-04-06 14:21:10,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:10,677 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-04-06 14:21:10,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:10,678 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-04-06 14:21:10,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 14:21:10,678 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:10,678 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:10,698 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 14:21:10,898 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 14:21:10,898 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:10,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:10,899 INFO L85 PathProgramCache]: Analyzing trace with hash -515500892, now seen corresponding path program 7 times [2022-04-06 14:21:10,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:10,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [635679483] [2022-04-06 14:21:10,902 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:10,902 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:10,902 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash -515500892, now seen corresponding path program 8 times [2022-04-06 14:21:10,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:10,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160748316] [2022-04-06 14:21:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:10,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 14:21:10,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160748316] [2022-04-06 14:21:10,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160748316] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:10,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069700830] [2022-04-06 14:21:10,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:21:10,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:10,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:10,996 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 14:21:10,997 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 14:21:11,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:21:11,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:11,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 14:21:11,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 14:21:11,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 14:21:11,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069700830] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:11,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:11,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 14:21:11,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:11,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [635679483] [2022-04-06 14:21:11,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [635679483] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:11,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:11,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:21:11,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479858962] [2022-04-06 14:21:11,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:11,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:21:11,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:21:11,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-04-06 14:21:11,171 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:11,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:11,244 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-04-06 14:21:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:21:11,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 14:21:11,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:11,245 INFO L225 Difference]: With dead ends: 53 [2022-04-06 14:21:11,245 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 14:21:11,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-04-06 14:21:11,246 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:11,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:21:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 14:21:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-04-06 14:21:11,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-04-06 14:21:11,250 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2022-04-06 14:21:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:11,250 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-04-06 14:21:11,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-04-06 14:21:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 14:21:11,251 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:11,251 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:11,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 14:21:11,466 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 14:21:11,466 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:11,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:11,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1377928616, now seen corresponding path program 9 times [2022-04-06 14:21:11,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:11,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [862590891] [2022-04-06 14:21:11,468 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:11,468 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:11,468 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:11,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1377928616, now seen corresponding path program 10 times [2022-04-06 14:21:11,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:11,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858437061] [2022-04-06 14:21:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:11,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:11,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 14:21:11,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:11,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858437061] [2022-04-06 14:21:11,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858437061] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:11,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158195631] [2022-04-06 14:21:11,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:21:11,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:11,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:11,532 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 14:21:11,537 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 14:21:11,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:21:11,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:11,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:21:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 14:21:11,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 14:21:11,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158195631] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:11,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:11,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 14:21:11,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:11,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [862590891] [2022-04-06 14:21:11,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [862590891] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:11,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:11,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:21:11,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122324895] [2022-04-06 14:21:11,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:11,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:21:11,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:11,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:21:11,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-04-06 14:21:11,772 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:11,871 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-04-06 14:21:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:21:11,871 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 14:21:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:11,872 INFO L225 Difference]: With dead ends: 59 [2022-04-06 14:21:11,872 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 14:21:11,873 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-04-06 14:21:11,873 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:11,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 31 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 14:21:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-04-06 14:21:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-04-06 14:21:11,877 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-04-06 14:21:11,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:11,877 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-04-06 14:21:11,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:11,878 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-04-06 14:21:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 14:21:11,878 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:11,878 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:11,915 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 14:21:12,078 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 14:21:12,079 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:12,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1159586988, now seen corresponding path program 11 times [2022-04-06 14:21:12,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:12,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1938652345] [2022-04-06 14:21:12,081 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:12,081 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:12,081 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:12,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1159586988, now seen corresponding path program 12 times [2022-04-06 14:21:12,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:12,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198306012] [2022-04-06 14:21:12,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:12,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:12,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 14:21:12,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:12,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198306012] [2022-04-06 14:21:12,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198306012] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:12,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382934732] [2022-04-06 14:21:12,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:21:12,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:12,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:12,251 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 14:21:12,294 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 14:21:12,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:21:12,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:12,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 14:21:12,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 14:21:12,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 14:21:12,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382934732] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:12,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:12,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 14:21:12,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:12,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1938652345] [2022-04-06 14:21:12,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1938652345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:12,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:12,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:21:12,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896649715] [2022-04-06 14:21:12,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:12,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:21:12,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:12,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:21:12,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:21:12,576 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:12,659 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-04-06 14:21:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:21:12,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 14:21:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:12,662 INFO L225 Difference]: With dead ends: 65 [2022-04-06 14:21:12,662 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 14:21:12,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-04-06 14:21:12,663 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:12,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 21 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:21:12,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 14:21:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-04-06 14:21:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-04-06 14:21:12,673 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2022-04-06 14:21:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:12,673 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-04-06 14:21:12,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-04-06 14:21:12,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 14:21:12,674 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:12,674 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:12,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 14:21:12,894 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 14:21:12,895 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:12,895 INFO L85 PathProgramCache]: Analyzing trace with hash 638595504, now seen corresponding path program 13 times [2022-04-06 14:21:12,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:12,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [137455904] [2022-04-06 14:21:12,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:12,897 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:12,897 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:12,897 INFO L85 PathProgramCache]: Analyzing trace with hash 638595504, now seen corresponding path program 14 times [2022-04-06 14:21:12,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:12,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070617936] [2022-04-06 14:21:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:12,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:13,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 14:21:13,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:13,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070617936] [2022-04-06 14:21:13,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070617936] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:13,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524346089] [2022-04-06 14:21:13,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:21:13,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:13,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:13,021 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 14:21:13,022 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 14:21:13,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:21:13,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 14:21:13,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 14:21:13,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 14:21:13,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524346089] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:13,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:13,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 14:21:13,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:13,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [137455904] [2022-04-06 14:21:13,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [137455904] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:13,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:13,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:21:13,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047207909] [2022-04-06 14:21:13,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:13,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:21:13,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:13,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:21:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-04-06 14:21:13,314 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 14:21:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:13,452 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-04-06 14:21:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:21:13,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 14:21:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:13,453 INFO L225 Difference]: With dead ends: 71 [2022-04-06 14:21:13,453 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 14:21:13,453 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:21:13,454 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:13,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 41 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 14:21:13,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-04-06 14:21:13,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-04-06 14:21:13,459 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2022-04-06 14:21:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:13,459 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-04-06 14:21:13,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 14:21:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-04-06 14:21:13,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 14:21:13,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:13,460 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:13,482 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 14:21:13,674 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 14:21:13,674 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:13,675 INFO L85 PathProgramCache]: Analyzing trace with hash -548574028, now seen corresponding path program 15 times [2022-04-06 14:21:13,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:13,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182462285] [2022-04-06 14:21:13,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:13,677 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:13,677 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash -548574028, now seen corresponding path program 16 times [2022-04-06 14:21:13,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:13,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776248790] [2022-04-06 14:21:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:13,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:13,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 14:21:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:13,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776248790] [2022-04-06 14:21:13,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776248790] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:13,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754398475] [2022-04-06 14:21:13,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:21:13,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:13,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:13,768 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 14:21:13,796 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 14:21:13,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:21:13,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:13,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 14:21:13,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 14:21:13,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 14:21:14,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754398475] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:14,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:14,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 14:21:14,106 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:14,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182462285] [2022-04-06 14:21:14,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182462285] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:14,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:14,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:21:14,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129773945] [2022-04-06 14:21:14,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:14,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:21:14,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:14,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:21:14,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-04-06 14:21:14,107 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:14,226 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-04-06 14:21:14,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:21:14,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have 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 14:21:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:14,226 INFO L225 Difference]: With dead ends: 77 [2022-04-06 14:21:14,227 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 14:21:14,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-04-06 14:21:14,228 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:14,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 26 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 14:21:14,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-04-06 14:21:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-04-06 14:21:14,245 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2022-04-06 14:21:14,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:14,246 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-04-06 14:21:14,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-04-06 14:21:14,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 14:21:14,246 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:14,246 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:14,279 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 14:21:14,462 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 14:21:14,463 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:14,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1504351672, now seen corresponding path program 17 times [2022-04-06 14:21:14,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:14,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1918012917] [2022-04-06 14:21:14,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:14,464 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:14,465 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:14,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1504351672, now seen corresponding path program 18 times [2022-04-06 14:21:14,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:14,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062312738] [2022-04-06 14:21:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:14,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:14,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:14,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 14:21:14,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062312738] [2022-04-06 14:21:14,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062312738] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531231711] [2022-04-06 14:21:14,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:21:14,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:14,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:14,565 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 14:21:14,589 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 14:21:15,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 14:21:15,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:15,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 14:21:15,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 14:21:15,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 14:21:15,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531231711] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:15,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:15,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 14:21:15,837 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:15,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1918012917] [2022-04-06 14:21:15,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1918012917] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:15,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:15,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:21:15,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676685742] [2022-04-06 14:21:15,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:15,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:21:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:15,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:21:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:21:15,838 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 14:21:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:15,980 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2022-04-06 14:21:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:21:15,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 50 [2022-04-06 14:21:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:15,981 INFO L225 Difference]: With dead ends: 83 [2022-04-06 14:21:15,981 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 14:21:15,982 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:21:15,982 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:15,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 51 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 14:21:15,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-04-06 14:21:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-04-06 14:21:15,988 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2022-04-06 14:21:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:15,988 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-04-06 14:21:15,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 14:21:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-04-06 14:21:15,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 14:21:15,988 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:15,988 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:16,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 14:21:16,200 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 14:21:16,201 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash -58938180, now seen corresponding path program 19 times [2022-04-06 14:21:16,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:16,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [986999680] [2022-04-06 14:21:16,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:16,203 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:16,203 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:16,203 INFO L85 PathProgramCache]: Analyzing trace with hash -58938180, now seen corresponding path program 20 times [2022-04-06 14:21:16,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:16,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663974874] [2022-04-06 14:21:16,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:16,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:16,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 14:21:16,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:16,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663974874] [2022-04-06 14:21:16,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663974874] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:16,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7464304] [2022-04-06 14:21:16,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:21:16,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:16,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:16,316 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 14:21:16,321 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 14:21:16,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:21:16,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:16,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 14:21:16,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 14:21:16,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 14:21:16,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7464304] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:16,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:16,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 14:21:16,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:16,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [986999680] [2022-04-06 14:21:16,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [986999680] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:16,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:16,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:21:16,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835279612] [2022-04-06 14:21:16,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:16,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:21:16,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:16,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:21:16,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:21:16,666 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:16,814 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-04-06 14:21:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:21:16,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-04-06 14:21:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:16,815 INFO L225 Difference]: With dead ends: 89 [2022-04-06 14:21:16,815 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 14:21:16,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 14:21:16,816 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:16,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 26 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 14:21:16,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2022-04-06 14:21:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 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 14:21:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-04-06 14:21:16,821 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-04-06 14:21:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:16,822 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-04-06 14:21:16,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-04-06 14:21:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 14:21:16,822 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:16,822 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:16,842 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 14:21:17,038 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 14:21:17,039 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:17,039 INFO L85 PathProgramCache]: Analyzing trace with hash 764981696, now seen corresponding path program 21 times [2022-04-06 14:21:17,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:17,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1403459266] [2022-04-06 14:21:17,040 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:17,040 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:17,041 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash 764981696, now seen corresponding path program 22 times [2022-04-06 14:21:17,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:17,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467651581] [2022-04-06 14:21:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:17,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 14:21:17,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:17,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467651581] [2022-04-06 14:21:17,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467651581] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:17,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037724999] [2022-04-06 14:21:17,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:21:17,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:17,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:17,176 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 14:21:17,177 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 14:21:17,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:21:17,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:17,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 14:21:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 14:21:17,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 14:21:17,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037724999] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:17,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:17,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 14:21:17,594 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:17,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1403459266] [2022-04-06 14:21:17,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1403459266] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:17,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:17,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:21:17,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115742297] [2022-04-06 14:21:17,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:17,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:21:17,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:17,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:21:17,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-04-06 14:21:17,595 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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 14:21:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:17,755 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-04-06 14:21:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:21:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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 58 [2022-04-06 14:21:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:17,756 INFO L225 Difference]: With dead ends: 95 [2022-04-06 14:21:17,756 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 14:21:17,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 14:21:17,757 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:17,757 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 31 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 14:21:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-04-06 14:21:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-04-06 14:21:17,762 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2022-04-06 14:21:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:17,763 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-04-06 14:21:17,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 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 14:21:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-04-06 14:21:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 14:21:17,763 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:17,763 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:17,780 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 14:21:17,975 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 14:21:17,975 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:17,976 INFO L85 PathProgramCache]: Analyzing trace with hash -783047484, now seen corresponding path program 23 times [2022-04-06 14:21:17,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:17,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1896425643] [2022-04-06 14:21:17,977 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:17,977 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:17,977 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:17,977 INFO L85 PathProgramCache]: Analyzing trace with hash -783047484, now seen corresponding path program 24 times [2022-04-06 14:21:17,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:17,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679383714] [2022-04-06 14:21:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:17,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:18,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 14:21:18,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679383714] [2022-04-06 14:21:18,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679383714] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530160617] [2022-04-06 14:21:18,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:21:18,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:18,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:18,101 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 14:21:18,119 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 14:21:21,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 14:21:21,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:21,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 14:21:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 23 proven. 144 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 14:21:21,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 14:21:21,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530160617] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:21,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:21,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15] total 31 [2022-04-06 14:21:21,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1896425643] [2022-04-06 14:21:21,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1896425643] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:21,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:21,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:21:21,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208579738] [2022-04-06 14:21:21,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:21,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:21:21,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:21,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:21:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-04-06 14:21:21,653 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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 14:21:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:21,873 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-04-06 14:21:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 14:21:21,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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 14:21:21,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:21,874 INFO L225 Difference]: With dead ends: 101 [2022-04-06 14:21:21,874 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 14:21:21,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 14:21:21,875 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:21,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 21 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:21,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 14:21:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-04-06 14:21:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-04-06 14:21:21,880 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2022-04-06 14:21:21,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:21,880 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-04-06 14:21:21,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 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 14:21:21,880 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-04-06 14:21:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 14:21:21,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:21,881 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:21,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 14:21:22,100 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 14:21:22,101 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:22,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:22,101 INFO L85 PathProgramCache]: Analyzing trace with hash -897415736, now seen corresponding path program 25 times [2022-04-06 14:21:22,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:22,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1558673727] [2022-04-06 14:21:22,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:22,102 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:22,102 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash -897415736, now seen corresponding path program 26 times [2022-04-06 14:21:22,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:22,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690578880] [2022-04-06 14:21:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:22,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:22,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-04-06 14:21:22,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:22,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690578880] [2022-04-06 14:21:22,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690578880] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:22,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99042797] [2022-04-06 14:21:22,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:21:22,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:22,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:22,262 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 14:21:22,263 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 14:21:22,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:21:22,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:22,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 14:21:22,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-04-06 14:21:22,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-04-06 14:21:22,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99042797] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:22,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:22,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 14:21:22,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:22,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1558673727] [2022-04-06 14:21:22,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1558673727] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:22,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:22,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:21:22,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017631305] [2022-04-06 14:21:22,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:22,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:21:22,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:22,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:21:22,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-04-06 14:21:22,782 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 14:21:22,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:22,968 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2022-04-06 14:21:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:21:22,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 66 [2022-04-06 14:21:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:22,969 INFO L225 Difference]: With dead ends: 107 [2022-04-06 14:21:22,969 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 14:21:22,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 14:21:22,973 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 98 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:22,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 26 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:22,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 14:21:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-04-06 14:21:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-04-06 14:21:22,999 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2022-04-06 14:21:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:22,999 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-04-06 14:21:22,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 14:21:22,999 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-04-06 14:21:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 14:21:23,001 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:23,002 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:23,019 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 14:21:23,214 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 14:21:23,215 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:23,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:23,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2054837452, now seen corresponding path program 27 times [2022-04-06 14:21:23,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:23,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1604083931] [2022-04-06 14:21:23,216 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:23,216 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:23,217 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2054837452, now seen corresponding path program 28 times [2022-04-06 14:21:23,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:23,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503223037] [2022-04-06 14:21:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:23,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:23,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 14:21:23,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:23,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503223037] [2022-04-06 14:21:23,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503223037] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:23,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309317747] [2022-04-06 14:21:23,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:21:23,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:23,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:23,349 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 14:21:23,388 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 14:21:23,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:21:23,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:23,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 14:21:23,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 14:21:23,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 14:21:24,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309317747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:24,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:24,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 14:21:24,003 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:24,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1604083931] [2022-04-06 14:21:24,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1604083931] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:24,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:24,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 14:21:24,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561158720] [2022-04-06 14:21:24,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:24,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 14:21:24,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:24,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 14:21:24,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 14:21:24,005 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:24,232 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-04-06 14:21:24,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 14:21:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-04-06 14:21:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:24,233 INFO L225 Difference]: With dead ends: 113 [2022-04-06 14:21:24,233 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 14:21:24,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 14:21:24,234 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:24,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 36 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 14:21:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-04-06 14:21:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-04-06 14:21:24,240 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2022-04-06 14:21:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:24,240 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-04-06 14:21:24,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-04-06 14:21:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 14:21:24,241 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:24,241 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:24,260 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 14:21:24,451 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 14:21:24,451 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1091572176, now seen corresponding path program 29 times [2022-04-06 14:21:24,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [747280428] [2022-04-06 14:21:24,453 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:24,453 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:24,453 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1091572176, now seen corresponding path program 30 times [2022-04-06 14:21:24,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:24,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345944174] [2022-04-06 14:21:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:24,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:24,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-04-06 14:21:24,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:24,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345944174] [2022-04-06 14:21:24,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345944174] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:24,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559117827] [2022-04-06 14:21:24,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:21:24,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:24,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:24,623 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 14:21:24,624 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 14:21:43,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 14:21:43,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:43,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 14:21:43,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-04-06 14:21:43,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-04-06 14:21:44,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559117827] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:44,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:44,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 14:21:44,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:44,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [747280428] [2022-04-06 14:21:44,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [747280428] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:44,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:44,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 14:21:44,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923105161] [2022-04-06 14:21:44,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:44,153 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 14:21:44,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:44,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 14:21:44,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 14:21:44,154 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 14:21:44,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:44,348 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2022-04-06 14:21:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 14:21:44,348 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 74 [2022-04-06 14:21:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:44,349 INFO L225 Difference]: With dead ends: 119 [2022-04-06 14:21:44,349 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 14:21:44,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:21:44,352 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:44,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 36 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 14:21:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-04-06 14:21:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-04-06 14:21:44,369 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-04-06 14:21:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:44,369 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-04-06 14:21:44,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 14:21:44,384 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-04-06 14:21:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 14:21:44,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:44,385 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:44,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 14:21:44,599 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 14:21:44,603 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:44,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:44,603 INFO L85 PathProgramCache]: Analyzing trace with hash -57099052, now seen corresponding path program 31 times [2022-04-06 14:21:44,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:44,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1422794502] [2022-04-06 14:21:44,605 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:44,605 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:44,605 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:44,605 INFO L85 PathProgramCache]: Analyzing trace with hash -57099052, now seen corresponding path program 32 times [2022-04-06 14:21:44,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:44,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766016999] [2022-04-06 14:21:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:44,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:44,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 14:21:44,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:44,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766016999] [2022-04-06 14:21:44,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766016999] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:44,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002590295] [2022-04-06 14:21:44,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:21:44,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:44,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:44,797 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 14:21:44,798 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 14:21:44,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:21:44,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:44,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 14:21:44,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 14:21:45,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 14:21:45,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002590295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:45,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:45,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 14:21:45,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:45,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1422794502] [2022-04-06 14:21:45,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1422794502] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:45,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:45,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 14:21:45,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198054003] [2022-04-06 14:21:45,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:45,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 14:21:45,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:45,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 14:21:45,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 14:21:45,445 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:45,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:45,681 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-04-06 14:21:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 14:21:45,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-04-06 14:21:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:45,682 INFO L225 Difference]: With dead ends: 125 [2022-04-06 14:21:45,682 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 14:21:45,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 14:21:45,683 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:45,684 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 31 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 14:21:45,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-04-06 14:21:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2022-04-06 14:21:45,689 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2022-04-06 14:21:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:45,689 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2022-04-06 14:21:45,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:45,690 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2022-04-06 14:21:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 14:21:45,690 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:45,690 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:45,707 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 14:21:45,902 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 14:21:45,902 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:45,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1981196840, now seen corresponding path program 33 times [2022-04-06 14:21:45,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:45,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [321026588] [2022-04-06 14:21:45,904 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:45,904 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:45,904 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:45,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1981196840, now seen corresponding path program 34 times [2022-04-06 14:21:45,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:45,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116648377] [2022-04-06 14:21:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:45,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:46,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 14:21:46,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116648377] [2022-04-06 14:21:46,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116648377] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307387361] [2022-04-06 14:21:46,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:21:46,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:46,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:46,086 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 14:21:46,088 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 14:21:46,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:21:46,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:21:46,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 14:21:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:21:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 14:21:46,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:21:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 14:21:46,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307387361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:21:46,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:21:46,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 14:21:46,808 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:21:46,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [321026588] [2022-04-06 14:21:46,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [321026588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:21:46,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:21:46,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 14:21:46,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543428096] [2022-04-06 14:21:46,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:21:46,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 14:21:46,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:46,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 14:21:46,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 14:21:46,809 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 14:21:47,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:21:47,066 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2022-04-06 14:21:47,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 14:21:47,066 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 82 [2022-04-06 14:21:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:21:47,067 INFO L225 Difference]: With dead ends: 131 [2022-04-06 14:21:47,067 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 14:21:47,067 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 14:21:47,068 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:21:47,068 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 26 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:21:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 14:21:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-04-06 14:21:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:21:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-04-06 14:21:47,074 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2022-04-06 14:21:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:21:47,074 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-04-06 14:21:47,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 14:21:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-04-06 14:21:47,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 14:21:47,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:21:47,075 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:21:47,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 14:21:47,287 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 14:21:47,287 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:21:47,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:21:47,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1146543324, now seen corresponding path program 35 times [2022-04-06 14:21:47,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:21:47,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [588909160] [2022-04-06 14:21:47,289 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:21:47,289 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:21:47,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:21:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1146543324, now seen corresponding path program 36 times [2022-04-06 14:21:47,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:21:47,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299189571] [2022-04-06 14:21:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:21:47,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:21:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:47,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:21:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:21:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 14:21:47,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:21:47,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299189571] [2022-04-06 14:21:47,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299189571] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:21:47,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817510600] [2022-04-06 14:21:47,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:21:47,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:21:47,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:21:47,507 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 14:21:47,535 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 14:22:18,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 14:22:18,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:18,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 14:22:18,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 14:22:18,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 14:22:18,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817510600] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:18,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:18,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 14:22:18,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [588909160] [2022-04-06 14:22:18,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [588909160] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:18,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:18,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 14:22:18,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982370099] [2022-04-06 14:22:18,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:18,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 14:22:18,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:18,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 14:22:18,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 14:22:18,815 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 14:22:19,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:19,110 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-04-06 14:22:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 14:22:19,110 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 86 [2022-04-06 14:22:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:19,111 INFO L225 Difference]: With dead ends: 137 [2022-04-06 14:22:19,111 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 14:22:19,112 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 14:22:19,112 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:19,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 36 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:22:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 14:22:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2022-04-06 14:22:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-04-06 14:22:19,119 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2022-04-06 14:22:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:19,119 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-04-06 14:22:19,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 14:22:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-04-06 14:22:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 14:22:19,119 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:19,120 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:19,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 14:22:19,320 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 14:22:19,320 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:19,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2051649056, now seen corresponding path program 37 times [2022-04-06 14:22:19,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:19,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2040654672] [2022-04-06 14:22:19,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:19,322 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:19,322 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2051649056, now seen corresponding path program 38 times [2022-04-06 14:22:19,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:19,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663697288] [2022-04-06 14:22:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:19,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:19,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-04-06 14:22:19,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:19,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663697288] [2022-04-06 14:22:19,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663697288] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:19,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512603410] [2022-04-06 14:22:19,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:22:19,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:19,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:19,523 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 14:22:19,539 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 14:22:19,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:22:19,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 14:22:19,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-04-06 14:22:19,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-04-06 14:22:20,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512603410] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:20,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:20,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 14:22:20,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:20,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2040654672] [2022-04-06 14:22:20,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2040654672] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:20,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:20,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 14:22:20,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269435512] [2022-04-06 14:22:20,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:20,379 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 14:22:20,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 14:22:20,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 14:22:20,380 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 14:22:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:20,696 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2022-04-06 14:22:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 14:22:20,696 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 90 [2022-04-06 14:22:20,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:20,697 INFO L225 Difference]: With dead ends: 143 [2022-04-06 14:22:20,697 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 14:22:20,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 14:22:20,698 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 127 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:20,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 31 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:22:20,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 14:22:20,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-04-06 14:22:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-04-06 14:22:20,706 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2022-04-06 14:22:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:20,706 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-04-06 14:22:20,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 14:22:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-04-06 14:22:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 14:22:20,706 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:20,707 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:20,726 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 14:22:20,923 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 14:22:20,924 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:20,924 INFO L85 PathProgramCache]: Analyzing trace with hash 643609828, now seen corresponding path program 39 times [2022-04-06 14:22:20,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:20,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [713071121] [2022-04-06 14:22:20,925 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:20,926 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:20,926 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:20,926 INFO L85 PathProgramCache]: Analyzing trace with hash 643609828, now seen corresponding path program 40 times [2022-04-06 14:22:20,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:20,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967944111] [2022-04-06 14:22:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:20,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:21,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 14:22:21,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:21,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967944111] [2022-04-06 14:22:21,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967944111] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:21,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911226182] [2022-04-06 14:22:21,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:22:21,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:21,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:21,201 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 14:22:21,202 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 14:22:21,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:22:21,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:22:21,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 14:22:21,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:22:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 14:22:21,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:22:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 14:22:22,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911226182] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:22:22,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:22:22,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 14:22:22,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:22:22,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [713071121] [2022-04-06 14:22:22,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [713071121] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:22:22,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:22:22,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 14:22:22,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023019280] [2022-04-06 14:22:22,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:22:22,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 14:22:22,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:22,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 14:22:22,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 14:22:22,118 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 14:22:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:22:22,457 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-04-06 14:22:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 14:22:22,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 94 [2022-04-06 14:22:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:22:22,459 INFO L225 Difference]: With dead ends: 149 [2022-04-06 14:22:22,459 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 14:22:22,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 14:22:22,460 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:22:22,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 36 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:22:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 14:22:22,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-04-06 14:22:22,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:22:22,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-04-06 14:22:22,468 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2022-04-06 14:22:22,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:22:22,468 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-04-06 14:22:22,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 14:22:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-04-06 14:22:22,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 14:22:22,469 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:22:22,469 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:22:22,488 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 14:22:22,686 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 14:22:22,686 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:22:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:22:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash -48298520, now seen corresponding path program 41 times [2022-04-06 14:22:22,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:22:22,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1463131912] [2022-04-06 14:22:22,698 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:22:22,698 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:22:22,698 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:22:22,699 INFO L85 PathProgramCache]: Analyzing trace with hash -48298520, now seen corresponding path program 42 times [2022-04-06 14:22:22,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:22:22,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095792392] [2022-04-06 14:22:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:22:22,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:22:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:22,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:22:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:22:22,945 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-04-06 14:22:22,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:22:22,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095792392] [2022-04-06 14:22:22,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095792392] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:22:22,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297312743] [2022-04-06 14:22:22,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:22:22,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:22:22,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:22:22,946 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 14:22:22,971 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 14:24:14,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 14:24:14,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:14,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 14:24:14,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-04-06 14:24:14,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-04-06 14:24:15,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297312743] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:15,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:15,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 14:24:15,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:15,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1463131912] [2022-04-06 14:24:15,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1463131912] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:15,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:15,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 14:24:15,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831605288] [2022-04-06 14:24:15,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:15,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 14:24:15,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:15,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 14:24:15,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 14:24:15,328 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 14:24:15,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:15,667 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2022-04-06 14:24:15,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 14:24:15,668 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 98 [2022-04-06 14:24:15,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:15,668 INFO L225 Difference]: With dead ends: 155 [2022-04-06 14:24:15,668 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 14:24:15,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 14:24:15,670 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 134 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:24:15,670 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 31 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:24:15,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 14:24:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2022-04-06 14:24:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-04-06 14:24:15,679 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-04-06 14:24:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:15,679 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-04-06 14:24:15,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 14:24:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-04-06 14:24:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 14:24:15,680 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:15,680 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:15,741 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 14:24:15,881 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 14:24:15,881 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:15,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1599227116, now seen corresponding path program 43 times [2022-04-06 14:24:15,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:15,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2137100428] [2022-04-06 14:24:15,883 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:15,883 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:15,883 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:15,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1599227116, now seen corresponding path program 44 times [2022-04-06 14:24:15,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:15,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149648829] [2022-04-06 14:24:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:15,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:16,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-04-06 14:24:16,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:16,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149648829] [2022-04-06 14:24:16,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149648829] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:16,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544799581] [2022-04-06 14:24:16,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:24:16,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:16,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:16,192 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 14:24:16,195 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 14:24:16,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:24:16,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:16,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 14:24:16,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-04-06 14:24:16,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-04-06 14:24:17,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544799581] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:17,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:17,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 14:24:17,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:17,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2137100428] [2022-04-06 14:24:17,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2137100428] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:17,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:17,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 14:24:17,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120783134] [2022-04-06 14:24:17,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:17,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 14:24:17,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:17,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 14:24:17,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 14:24:17,257 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 14:24:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:17,623 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-04-06 14:24:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 14:24:17,624 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 102 [2022-04-06 14:24:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:17,624 INFO L225 Difference]: With dead ends: 161 [2022-04-06 14:24:17,624 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 14:24:17,626 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 14:24:17,626 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 159 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:24:17,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 36 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:24:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 14:24:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-04-06 14:24:17,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0196078431372548) internal successors, (104), 102 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-04-06 14:24:17,651 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2022-04-06 14:24:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:17,652 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-04-06 14:24:17,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 14:24:17,652 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-04-06 14:24:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-04-06 14:24:17,652 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:17,652 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:17,676 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 14:24:17,855 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 14:24:17,855 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:17,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:17,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1597279760, now seen corresponding path program 45 times [2022-04-06 14:24:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:17,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [533534093] [2022-04-06 14:24:17,857 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:17,857 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:17,857 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:17,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1597279760, now seen corresponding path program 46 times [2022-04-06 14:24:17,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:17,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427211915] [2022-04-06 14:24:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:17,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:18,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-04-06 14:24:18,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:18,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427211915] [2022-04-06 14:24:18,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427211915] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:18,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863980329] [2022-04-06 14:24:18,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:24:18,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:18,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:18,114 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 14:24:18,115 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 14:24:18,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:24:18,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:24:18,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 14:24:18,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:24:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-04-06 14:24:18,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:24:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-04-06 14:24:19,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863980329] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:24:19,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:24:19,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 14:24:19,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:24:19,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [533534093] [2022-04-06 14:24:19,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [533534093] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:24:19,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:24:19,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 14:24:19,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655408793] [2022-04-06 14:24:19,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:24:19,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 14:24:19,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 14:24:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 14:24:19,067 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 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 14:24:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:24:19,390 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2022-04-06 14:24:19,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 14:24:19,390 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 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 106 [2022-04-06 14:24:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:24:19,405 INFO L225 Difference]: With dead ends: 167 [2022-04-06 14:24:19,405 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 14:24:19,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 14:24:19,407 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 163 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:24:19,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 46 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:24:19,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 14:24:19,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-04-06 14:24:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:24:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-04-06 14:24:19,421 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2022-04-06 14:24:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:24:19,424 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-04-06 14:24:19,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 26 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 14:24:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-04-06 14:24:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 14:24:19,425 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:24:19,425 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:24:19,450 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 14:24:19,639 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 14:24:19,639 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:24:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:24:19,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1814065932, now seen corresponding path program 47 times [2022-04-06 14:24:19,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:24:19,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1308864525] [2022-04-06 14:24:19,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:24:19,641 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:24:19,641 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:24:19,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1814065932, now seen corresponding path program 48 times [2022-04-06 14:24:19,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:24:19,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268556437] [2022-04-06 14:24:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:24:19,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:24:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:19,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:24:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:24:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-04-06 14:24:19,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:24:19,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268556437] [2022-04-06 14:24:19,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268556437] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:24:19,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79839195] [2022-04-06 14:24:19,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:24:19,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:24:19,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:24:19,937 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 14:24:19,938 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 14:26:49,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-06 14:26:49,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:26:49,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 14:26:49,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:26:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-04-06 14:26:49,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:26:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-04-06 14:26:50,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79839195] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:26:50,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:26:50,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 14:26:50,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:26:50,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1308864525] [2022-04-06 14:26:50,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1308864525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:26:50,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:26:50,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 14:26:50,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739860499] [2022-04-06 14:26:50,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:26:50,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 14:26:50,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:50,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 14:26:50,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 14:26:50,235 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 14:26:50,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:26:50,662 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2022-04-06 14:26:50,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 14:26:50,662 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 110 [2022-04-06 14:26:50,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:26:50,663 INFO L225 Difference]: With dead ends: 173 [2022-04-06 14:26:50,663 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 14:26:50,663 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 14:26:50,664 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 166 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:26:50,664 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 36 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:26:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 14:26:50,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2022-04-06 14:26:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:26:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-04-06 14:26:50,677 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2022-04-06 14:26:50,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:26:50,678 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-04-06 14:26:50,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 27 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 14:26:50,678 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-04-06 14:26:50,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 14:26:50,678 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:26:50,678 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:26:50,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 14:26:50,901 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 14:26:50,901 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:26:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:26:50,901 INFO L85 PathProgramCache]: Analyzing trace with hash 157521400, now seen corresponding path program 49 times [2022-04-06 14:26:50,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:50,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [839779077] [2022-04-06 14:26:50,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:26:50,903 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:26:50,903 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:26:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash 157521400, now seen corresponding path program 50 times [2022-04-06 14:26:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:26:50,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788524634] [2022-04-06 14:26:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:26:50,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:26:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:51,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:26:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-04-06 14:26:51,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:26:51,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788524634] [2022-04-06 14:26:51,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788524634] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:26:51,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524375510] [2022-04-06 14:26:51,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:26:51,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:51,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:26:51,164 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 14:26:51,164 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 14:26:51,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:26:51,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:26:51,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 14:26:51,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:26:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-04-06 14:26:51,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:26:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-04-06 14:26:52,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524375510] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:26:52,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:26:52,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 14:26:52,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:26:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [839779077] [2022-04-06 14:26:52,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [839779077] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:26:52,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:26:52,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 14:26:52,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689362127] [2022-04-06 14:26:52,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:26:52,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 14:26:52,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:52,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 14:26:52,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 14:26:52,113 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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 14:26:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:26:52,442 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2022-04-06 14:26:52,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 14:26:52,442 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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 114 [2022-04-06 14:26:52,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:26:52,443 INFO L225 Difference]: With dead ends: 179 [2022-04-06 14:26:52,443 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 14:26:52,444 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 14:26:52,444 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 213 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:26:52,444 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 21 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:26:52,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 14:26:52,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2022-04-06 14:26:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:26:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-04-06 14:26:52,456 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2022-04-06 14:26:52,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:26:52,457 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-04-06 14:26:52,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 28 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 14:26:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-04-06 14:26:52,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 14:26:52,457 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:26:52,457 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:26:52,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 14:26:52,687 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 14:26:52,687 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:26:52,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:26:52,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1353485564, now seen corresponding path program 51 times [2022-04-06 14:26:52,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:52,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1043973649] [2022-04-06 14:26:52,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:26:52,689 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:26:52,689 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:26:52,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1353485564, now seen corresponding path program 52 times [2022-04-06 14:26:52,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:26:52,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898117202] [2022-04-06 14:26:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:26:52,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:26:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:53,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:26:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 14:26:53,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:26:53,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898117202] [2022-04-06 14:26:53,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898117202] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:26:53,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206358409] [2022-04-06 14:26:53,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:26:53,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:53,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:26:53,061 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 14:26:53,061 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 14:26:53,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:26:53,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:26:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 14:26:53,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:26:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 14:26:53,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:26:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 14:26:54,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206358409] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:26:54,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:26:54,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 14:26:54,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:26:54,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1043973649] [2022-04-06 14:26:54,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1043973649] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:26:54,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:26:54,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 14:26:54,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869794200] [2022-04-06 14:26:54,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:26:54,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 14:26:54,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:54,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 14:26:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 14:26:54,140 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 14:26:54,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:26:54,458 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2022-04-06 14:26:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 14:26:54,459 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 118 [2022-04-06 14:26:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:26:54,459 INFO L225 Difference]: With dead ends: 185 [2022-04-06 14:26:54,459 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 14:26:54,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 14:26:54,461 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 184 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:26:54,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 36 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:26:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 14:26:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-04-06 14:26:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:26:54,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2022-04-06 14:26:54,472 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118 [2022-04-06 14:26:54,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:26:54,472 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2022-04-06 14:26:54,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 14:26:54,472 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2022-04-06 14:26:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 14:26:54,473 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:26:54,473 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:26:54,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 14:26:54,676 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 14:26:54,676 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:26:54,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:26:54,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1215335936, now seen corresponding path program 53 times [2022-04-06 14:26:54,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:26:54,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [446124829] [2022-04-06 14:26:54,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:26:54,679 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:26:54,679 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:26:54,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1215335936, now seen corresponding path program 54 times [2022-04-06 14:26:54,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:26:54,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539624193] [2022-04-06 14:26:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:26:54,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:26:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:54,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:26:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:26:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-04-06 14:26:54,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:26:54,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539624193] [2022-04-06 14:26:54,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539624193] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:26:54,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442745619] [2022-04-06 14:26:54,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:26:54,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:26:54,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:26:54,935 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 14:26:54,936 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 14:32:38,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-04-06 14:32:38,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:38,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 14:32:38,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-04-06 14:32:38,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-04-06 14:32:39,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442745619] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:39,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:39,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 14:32:39,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:39,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [446124829] [2022-04-06 14:32:39,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [446124829] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:39,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:39,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 14:32:39,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152688208] [2022-04-06 14:32:39,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:39,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 14:32:39,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:39,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 14:32:39,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 14:32:39,604 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 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 14:32:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:40,017 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2022-04-06 14:32:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 14:32:40,017 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 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 122 [2022-04-06 14:32:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:40,018 INFO L225 Difference]: With dead ends: 191 [2022-04-06 14:32:40,018 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 14:32:40,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 14:32:40,020 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 172 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:40,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 41 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 14:32:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2022-04-06 14:32:40,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:32:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-04-06 14:32:40,037 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2022-04-06 14:32:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:40,037 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-04-06 14:32:40,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 30 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 14:32:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-04-06 14:32:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-04-06 14:32:40,038 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:40,038 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:40,116 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 14:32:40,251 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 14:32:40,251 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:40,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash 174146820, now seen corresponding path program 55 times [2022-04-06 14:32:40,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:40,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [263155813] [2022-04-06 14:32:40,254 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:40,254 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:40,254 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:40,254 INFO L85 PathProgramCache]: Analyzing trace with hash 174146820, now seen corresponding path program 56 times [2022-04-06 14:32:40,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:40,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678741680] [2022-04-06 14:32:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:40,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:40,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-04-06 14:32:40,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678741680] [2022-04-06 14:32:40,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678741680] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:40,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880662094] [2022-04-06 14:32:40,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:32:40,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:40,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:40,651 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 14:32:40,652 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 14:32:41,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:32:41,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:41,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 14:32:41,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-04-06 14:32:41,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-04-06 14:32:41,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880662094] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:41,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:41,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 14:32:41,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:41,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [263155813] [2022-04-06 14:32:41,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [263155813] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:41,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:41,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 14:32:41,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477581399] [2022-04-06 14:32:41,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:41,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 14:32:41,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:41,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 14:32:41,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 14:32:41,929 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 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 14:32:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:42,409 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2022-04-06 14:32:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 14:32:42,409 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 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 126 [2022-04-06 14:32:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:42,410 INFO L225 Difference]: With dead ends: 197 [2022-04-06 14:32:42,410 INFO L226 Difference]: Without dead ends: 133 [2022-04-06 14:32:42,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 14:32:42,412 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 178 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:42,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 36 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-06 14:32:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-04-06 14:32:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0158730158730158) internal successors, (128), 126 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:32:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2022-04-06 14:32:42,425 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126 [2022-04-06 14:32:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:42,425 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2022-04-06 14:32:42,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 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 14:32:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2022-04-06 14:32:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-04-06 14:32:42,425 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:42,425 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:42,444 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 14:32:42,644 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 14:32:42,644 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:42,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:42,645 INFO L85 PathProgramCache]: Analyzing trace with hash 334956040, now seen corresponding path program 57 times [2022-04-06 14:32:42,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:42,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1906480764] [2022-04-06 14:32:42,646 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:42,646 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:42,646 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:42,646 INFO L85 PathProgramCache]: Analyzing trace with hash 334956040, now seen corresponding path program 58 times [2022-04-06 14:32:42,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:42,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910275689] [2022-04-06 14:32:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:42,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:43,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-04-06 14:32:43,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:43,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910275689] [2022-04-06 14:32:43,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910275689] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:43,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475607648] [2022-04-06 14:32:43,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:32:43,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:43,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:43,045 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 14:32:43,046 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 14:32:43,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:32:43,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:32:43,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 14:32:43,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:32:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-04-06 14:32:43,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:32:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-04-06 14:32:44,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475607648] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:32:44,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:32:44,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 14:32:44,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:32:44,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1906480764] [2022-04-06 14:32:44,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1906480764] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:32:44,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:32:44,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 14:32:44,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253000954] [2022-04-06 14:32:44,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:32:44,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 14:32:44,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:44,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 14:32:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 14:32:44,620 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:32:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:32:45,182 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2022-04-06 14:32:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 14:32:45,183 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-04-06 14:32:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:32:45,183 INFO L225 Difference]: With dead ends: 203 [2022-04-06 14:32:45,183 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 14:32:45,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 14:32:45,184 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 213 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:32:45,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 41 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:32:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 14:32:45,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-04-06 14:32:45,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:32:45,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-04-06 14:32:45,198 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2022-04-06 14:32:45,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:32:45,198 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-04-06 14:32:45,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.121212121212121) internal successors, (70), 32 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:32:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-04-06 14:32:45,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 14:32:45,198 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:32:45,198 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:32:45,217 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 14:32:45,417 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 14:32:45,417 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:32:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:32:45,417 INFO L85 PathProgramCache]: Analyzing trace with hash 497399052, now seen corresponding path program 59 times [2022-04-06 14:32:45,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:32:45,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1075545553] [2022-04-06 14:32:45,419 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:32:45,419 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:32:45,419 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:32:45,419 INFO L85 PathProgramCache]: Analyzing trace with hash 497399052, now seen corresponding path program 60 times [2022-04-06 14:32:45,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:32:45,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418117529] [2022-04-06 14:32:45,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:32:45,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:32:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:45,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:32:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:32:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-04-06 14:32:45,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:32:45,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418117529] [2022-04-06 14:32:45,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418117529] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:32:45,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669536825] [2022-04-06 14:32:45,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:32:45,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:32:45,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:32:45,856 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 14:32:45,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process