/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:31:25,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:31:25,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:31:25,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:31:25,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:31:25,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:31:25,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:31:25,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:31:25,943 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:31:25,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:31:25,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:31:25,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:31:25,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:31:25,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:31:25,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:31:25,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:31:25,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:31:25,944 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:31:25,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:31:25,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:31:25,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:31:25,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:31:25,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:31:25,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:31:25,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:31:25,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:31:25,945 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:31:25,945 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:31:25,945 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:31:25,946 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:31:25,946 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:31:26,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:31:26,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:31:26,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:31:26,125 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:31:26,125 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:31:26,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2022-03-20 18:31:26,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e55e5877/2a474e52415c44a0bb3178fe8a058b69/FLAGe9dcb079e [2022-03-20 18:31:26,518 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:31:26,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2022-03-20 18:31:26,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e55e5877/2a474e52415c44a0bb3178fe8a058b69/FLAGe9dcb079e [2022-03-20 18:31:26,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e55e5877/2a474e52415c44a0bb3178fe8a058b69 [2022-03-20 18:31:26,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:31:26,918 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:31:26,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:31:26,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:31:26,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:31:26,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:31:26" (1/1) ... [2022-03-20 18:31:26,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8edd55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:26, skipping insertion in model container [2022-03-20 18:31:26,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:31:26" (1/1) ... [2022-03-20 18:31:26,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:31:26,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:31:27,161 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-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2022-03-20 18:31:27,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:31:27,178 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:31:27,230 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-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2022-03-20 18:31:27,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:31:27,244 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:31:27,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:27 WrapperNode [2022-03-20 18:31:27,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:31:27,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:31:27,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:31:27,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:31:27,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:27" (1/1) ... [2022-03-20 18:31:27,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:27" (1/1) ... [2022-03-20 18:31:27,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:27" (1/1) ... [2022-03-20 18:31:27,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:27" (1/1) ... [2022-03-20 18:31:27,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:27" (1/1) ... [2022-03-20 18:31:27,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:27" (1/1) ... [2022-03-20 18:31:27,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:27" (1/1) ... [2022-03-20 18:31:27,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:31:27,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:31:27,329 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:31:27,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:31:27,330 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:27" (1/1) ... [2022-03-20 18:31:27,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:31:27,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:27,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 18:31:27,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 18:31:27,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:31:27,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:31:27,420 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:31:27,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:31:27,420 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:31:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:31:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:31:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:31:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-03-20 18:31:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-03-20 18:31:27,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:31:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:31:27,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 18:31:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:31:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-03-20 18:31:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:31:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:31:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:31:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:31:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:31:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-03-20 18:31:27,571 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:31:27,572 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:31:27,996 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:31:28,020 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:31:28,020 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-20 18:31:28,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:31:28 BoogieIcfgContainer [2022-03-20 18:31:28,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:31:28,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:31:28,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:31:28,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:31:28,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:31:26" (1/3) ... [2022-03-20 18:31:28,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355bade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:31:28, skipping insertion in model container [2022-03-20 18:31:28,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:31:27" (2/3) ... [2022-03-20 18:31:28,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@355bade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:31:28, skipping insertion in model container [2022-03-20 18:31:28,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:31:28" (3/3) ... [2022-03-20 18:31:28,028 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2022-03-20 18:31:28,031 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:31:28,032 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:31:28,067 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:31:28,072 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 18:31:28,072 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:31:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 50 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 18:31:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 18:31:28,121 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:28,122 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:28,122 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:28,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:28,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1054632774, now seen corresponding path program 1 times [2022-03-20 18:31:28,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:28,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1687106605] [2022-03-20 18:31:28,154 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:31:28,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1054632774, now seen corresponding path program 2 times [2022-03-20 18:31:28,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:28,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618350904] [2022-03-20 18:31:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:28,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:28,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:28,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:28,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618350904] [2022-03-20 18:31:28,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618350904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:28,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:28,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:31:28,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1687106605] [2022-03-20 18:31:28,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1687106605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:28,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:28,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:31:28,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344832296] [2022-03-20 18:31:28,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:28,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:31:28,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:28,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:31:28,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:31:28,881 INFO L87 Difference]: Start difference. First operand has 55 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 50 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:29,505 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2022-03-20 18:31:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:31:29,507 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-03-20 18:31:29,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:29,512 INFO L225 Difference]: With dead ends: 92 [2022-03-20 18:31:29,512 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 18:31:29,514 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-20 18:31:29,516 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 120 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:29,517 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 717 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:31:29,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 18:31:29,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-03-20 18:31:29,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-03-20 18:31:29,559 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2022-03-20 18:31:29,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:29,560 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-03-20 18:31:29,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:29,560 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-03-20 18:31:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 18:31:29,562 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:29,562 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:29,562 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:31:29,562 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:29,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:29,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1470519801, now seen corresponding path program 1 times [2022-03-20 18:31:29,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:29,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [667417257] [2022-03-20 18:31:29,566 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:31:29,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1470519801, now seen corresponding path program 2 times [2022-03-20 18:31:29,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:29,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981337301] [2022-03-20 18:31:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:29,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:29,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:29,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:29,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981337301] [2022-03-20 18:31:29,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981337301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:29,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368885695] [2022-03-20 18:31:29,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:31:29,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:29,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:29,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:29,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 18:31:30,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:31:30,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:30,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 18:31:30,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:30,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:31,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368885695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:31,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:31,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 32 [2022-03-20 18:31:31,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:31,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [667417257] [2022-03-20 18:31:31,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [667417257] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:31,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:31,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 18:31:31,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286917357] [2022-03-20 18:31:31,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:31,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 18:31:31,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:31,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 18:31:31,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:31:31,074 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:31,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:31,410 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-03-20 18:31:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:31:31,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-20 18:31:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:31,411 INFO L225 Difference]: With dead ends: 65 [2022-03-20 18:31:31,411 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 18:31:31,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=358, Invalid=1202, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:31:31,413 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:31,413 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 239 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:31:31,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 18:31:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-03-20 18:31:31,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:31,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-03-20 18:31:31,432 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2022-03-20 18:31:31,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:31,433 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-03-20 18:31:31,434 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:31,434 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-03-20 18:31:31,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 18:31:31,436 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:31,436 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:31,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:31,652 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:31,652 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:31,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:31,653 INFO L85 PathProgramCache]: Analyzing trace with hash 412615706, now seen corresponding path program 3 times [2022-03-20 18:31:31,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:31,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1460313592] [2022-03-20 18:31:31,654 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:31:31,654 INFO L85 PathProgramCache]: Analyzing trace with hash 412615706, now seen corresponding path program 4 times [2022-03-20 18:31:31,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:31,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389588490] [2022-03-20 18:31:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:31,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:32,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:32,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:32,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389588490] [2022-03-20 18:31:32,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389588490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:32,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295309650] [2022-03-20 18:31:32,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:31:32,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:32,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:32,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:32,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 18:31:32,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:31:32,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:32,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 18:31:32,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:32,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:32,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295309650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:32,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:32,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 34 [2022-03-20 18:31:32,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:32,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1460313592] [2022-03-20 18:31:32,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1460313592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:32,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:32,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:31:32,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420173164] [2022-03-20 18:31:32,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:32,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:31:32,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:32,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:31:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:31:32,819 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:33,221 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-03-20 18:31:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:31:33,221 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-03-20 18:31:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:33,222 INFO L225 Difference]: With dead ends: 70 [2022-03-20 18:31:33,222 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 18:31:33,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=413, Invalid=1393, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 18:31:33,223 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:33,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 292 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:31:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 18:31:33,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-03-20 18:31:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-03-20 18:31:33,240 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2022-03-20 18:31:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:33,240 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-03-20 18:31:33,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-03-20 18:31:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 18:31:33,241 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:33,241 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:33,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:33,442 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,SelfDestructingSolverStorable2 [2022-03-20 18:31:33,442 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:33,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:33,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1771010407, now seen corresponding path program 5 times [2022-03-20 18:31:33,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:33,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1039516758] [2022-03-20 18:31:33,443 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:31:33,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1771010407, now seen corresponding path program 6 times [2022-03-20 18:31:33,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:33,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829842752] [2022-03-20 18:31:33,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:33,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:33,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:33,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:33,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829842752] [2022-03-20 18:31:33,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829842752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:33,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562846648] [2022-03-20 18:31:33,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:31:33,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:33,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:33,747 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:33,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 18:31:35,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 18:31:35,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 18:31:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:36,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:36,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562846648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:36,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:36,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 36 [2022-03-20 18:31:36,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:36,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1039516758] [2022-03-20 18:31:36,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1039516758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:36,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:36,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:31:36,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457827416] [2022-03-20 18:31:36,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:36,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 18:31:36,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:36,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 18:31:36,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:31:36,486 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:37,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:37,008 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-03-20 18:31:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 18:31:37,008 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-03-20 18:31:37,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:37,009 INFO L225 Difference]: With dead ends: 75 [2022-03-20 18:31:37,009 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 18:31:37,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=472, Invalid=1598, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:31:37,011 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:37,011 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 328 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:31:37,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 18:31:37,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-03-20 18:31:37,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-03-20 18:31:37,017 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 63 [2022-03-20 18:31:37,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:37,018 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-03-20 18:31:37,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-03-20 18:31:37,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 18:31:37,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:37,020 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:37,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 18:31:37,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:37,221 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:37,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:37,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1370440838, now seen corresponding path program 7 times [2022-03-20 18:31:37,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:37,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1389744562] [2022-03-20 18:31:37,222 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:31:37,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1370440838, now seen corresponding path program 8 times [2022-03-20 18:31:37,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:37,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292471526] [2022-03-20 18:31:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:37,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:37,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292471526] [2022-03-20 18:31:37,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292471526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:37,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551357723] [2022-03-20 18:31:37,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:31:37,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:37,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:37,552 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:37,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 18:31:37,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:31:37,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:37,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 18:31:37,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:38,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:38,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551357723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:38,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:38,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 38 [2022-03-20 18:31:38,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:38,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1389744562] [2022-03-20 18:31:38,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1389744562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:38,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:38,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 18:31:38,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34214682] [2022-03-20 18:31:38,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:38,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 18:31:38,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:38,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 18:31:38,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:31:38,665 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:39,205 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-03-20 18:31:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 18:31:39,205 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 18:31:39,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:39,206 INFO L225 Difference]: With dead ends: 80 [2022-03-20 18:31:39,206 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 18:31:39,207 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 18:31:39,207 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:39,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 352 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:31:39,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 18:31:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-03-20 18:31:39,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-03-20 18:31:39,214 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 68 [2022-03-20 18:31:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:39,214 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-03-20 18:31:39,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-03-20 18:31:39,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 18:31:39,218 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:39,218 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:39,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:39,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:39,419 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:39,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:39,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1100780743, now seen corresponding path program 9 times [2022-03-20 18:31:39,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:39,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [198103653] [2022-03-20 18:31:39,420 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:31:39,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1100780743, now seen corresponding path program 10 times [2022-03-20 18:31:39,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:39,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289090266] [2022-03-20 18:31:39,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:39,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:39,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:39,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:39,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289090266] [2022-03-20 18:31:39,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289090266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:39,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191365184] [2022-03-20 18:31:39,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:31:39,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:39,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:39,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 18:31:40,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:31:40,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:40,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 18:31:40,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:40,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:40,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191365184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:40,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:40,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 40 [2022-03-20 18:31:40,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:40,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [198103653] [2022-03-20 18:31:40,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [198103653] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:40,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:40,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 18:31:40,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139236546] [2022-03-20 18:31:40,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:40,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 18:31:40,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:40,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 18:31:40,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:31:40,895 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:41,581 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-03-20 18:31:41,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 18:31:41,581 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-03-20 18:31:41,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:41,582 INFO L225 Difference]: With dead ends: 85 [2022-03-20 18:31:41,582 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 18:31:41,583 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=602, Invalid=2050, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:31:41,584 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:41,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 406 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:31:41,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 18:31:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2022-03-20 18:31:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:41,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-03-20 18:31:41,591 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 73 [2022-03-20 18:31:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:41,591 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-03-20 18:31:41,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 22 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-03-20 18:31:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 18:31:41,591 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:41,591 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:41,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 18:31:41,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:41,810 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:41,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash -812401958, now seen corresponding path program 11 times [2022-03-20 18:31:41,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:41,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [717098101] [2022-03-20 18:31:41,811 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:31:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash -812401958, now seen corresponding path program 12 times [2022-03-20 18:31:41,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:41,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037602708] [2022-03-20 18:31:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:41,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:42,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:42,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:42,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037602708] [2022-03-20 18:31:42,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037602708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:42,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961903927] [2022-03-20 18:31:42,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:31:42,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:42,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:42,199 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:42,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 18:31:43,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:31:43,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:43,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 114 conjunts are in the unsatisfiable core [2022-03-20 18:31:43,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:53,595 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:31:53,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 30 select indices, 30 select index equivalence classes, 406 disjoint index pairs (out of 435 index pairs), introduced 30 new quantified variables, introduced 435 case distinctions, treesize of input 211 treesize of output 323 [2022-03-20 18:32:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-20 18:32:49,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:32:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-20 18:32:51,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961903927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:32:51,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:32:51,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 15] total 51 [2022-03-20 18:32:51,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:51,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [717098101] [2022-03-20 18:32:51,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [717098101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:51,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:51,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 18:32:51,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164399873] [2022-03-20 18:32:51,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:51,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 18:32:51,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:51,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 18:32:51,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2181, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:32:51,955 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:52,819 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-03-20 18:32:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 18:32:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-03-20 18:32:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:52,821 INFO L225 Difference]: With dead ends: 90 [2022-03-20 18:32:52,821 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 18:32:52,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=484, Invalid=3548, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:32:52,824 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:52,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 438 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:32:52,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 18:32:52,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2022-03-20 18:32:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:52,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-03-20 18:32:52,844 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 78 [2022-03-20 18:32:52,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:52,844 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-03-20 18:32:52,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 23 states have internal predecessors, (75), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:52,845 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-03-20 18:32:52,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 18:32:52,845 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:52,845 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:52,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 18:32:53,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:53,053 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:53,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:53,055 INFO L85 PathProgramCache]: Analyzing trace with hash -570882087, now seen corresponding path program 13 times [2022-03-20 18:32:53,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:53,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [752519556] [2022-03-20 18:32:53,056 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:32:53,056 INFO L85 PathProgramCache]: Analyzing trace with hash -570882087, now seen corresponding path program 14 times [2022-03-20 18:32:53,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:53,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901086375] [2022-03-20 18:32:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:53,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:53,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:53,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:53,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901086375] [2022-03-20 18:32:53,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901086375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:32:53,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810596656] [2022-03-20 18:32:53,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:32:53,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:53,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:53,460 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:32:53,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 18:32:53,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:32:53,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:32:54,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 18:32:54,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:32:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:54,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:32:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:54,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810596656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:32:54,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:32:54,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 44 [2022-03-20 18:32:54,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:54,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [752519556] [2022-03-20 18:32:54,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [752519556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:54,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:54,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 18:32:54,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686347843] [2022-03-20 18:32:54,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:54,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 18:32:54,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:54,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 18:32:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:32:54,966 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:55,796 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-03-20 18:32:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 18:32:55,796 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 18:32:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:55,797 INFO L225 Difference]: With dead ends: 95 [2022-03-20 18:32:55,797 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 18:32:55,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=748, Invalid=2558, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:32:55,798 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:55,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 492 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:32:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 18:32:55,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-03-20 18:32:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-03-20 18:32:55,808 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 83 [2022-03-20 18:32:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:55,808 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-03-20 18:32:55,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 24 states have internal predecessors, (80), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:55,809 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-03-20 18:32:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 18:32:55,809 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:55,809 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:55,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 18:32:56,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:56,010 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:56,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1780941370, now seen corresponding path program 15 times [2022-03-20 18:32:56,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:56,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1430930379] [2022-03-20 18:32:56,011 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:32:56,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1780941370, now seen corresponding path program 16 times [2022-03-20 18:32:56,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:56,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252235753] [2022-03-20 18:32:56,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:56,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:56,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:56,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:56,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252235753] [2022-03-20 18:32:56,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252235753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:32:56,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828656709] [2022-03-20 18:32:56,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:32:56,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:56,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:56,453 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:32:56,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 18:32:56,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:32:56,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:32:56,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 18:32:56,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:32:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:57,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:32:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:57,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828656709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:32:57,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:32:57,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 46 [2022-03-20 18:32:57,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:57,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1430930379] [2022-03-20 18:32:57,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1430930379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:57,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:57,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 18:32:57,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941514121] [2022-03-20 18:32:57,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:57,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 18:32:57,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:57,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 18:32:57,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1570, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:32:57,775 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:58,466 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-03-20 18:32:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 18:32:58,466 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-03-20 18:32:58,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:58,469 INFO L225 Difference]: With dead ends: 100 [2022-03-20 18:32:58,469 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 18:32:58,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=827, Invalid=2833, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 18:32:58,471 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:58,471 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 484 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:32:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 18:32:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2022-03-20 18:32:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-03-20 18:32:58,478 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 88 [2022-03-20 18:32:58,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:58,479 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-03-20 18:32:58,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:58,479 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-03-20 18:32:58,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 18:32:58,482 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:58,482 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:58,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 18:32:58,696 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,SelfDestructingSolverStorable8 [2022-03-20 18:32:58,696 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:58,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1289003911, now seen corresponding path program 17 times [2022-03-20 18:32:58,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:58,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1931368776] [2022-03-20 18:32:58,697 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:32:58,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1289003911, now seen corresponding path program 18 times [2022-03-20 18:32:58,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:58,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096973303] [2022-03-20 18:32:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:58,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:59,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:59,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096973303] [2022-03-20 18:32:59,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096973303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:32:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936509219] [2022-03-20 18:32:59,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:32:59,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:59,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:59,151 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:32:59,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 18:33:06,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:33:06,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:33:06,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 178 conjunts are in the unsatisfiable core [2022-03-20 18:33:06,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:33:30,300 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:33:30,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 40 select indices, 40 select index equivalence classes, 741 disjoint index pairs (out of 780 index pairs), introduced 40 new quantified variables, introduced 780 case distinctions, treesize of input 281 treesize of output 433 [2022-03-20 18:35:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-20 18:35:11,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:35:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 18:35:19,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936509219] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:35:19,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:35:19,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 73 [2022-03-20 18:35:19,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:19,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1931368776] [2022-03-20 18:35:19,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1931368776] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:19,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:19,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 18:35:19,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974463973] [2022-03-20 18:35:19,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:19,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 18:35:19,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:19,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 18:35:19,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=760, Invalid=4496, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 18:35:19,097 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:20,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:20,585 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2022-03-20 18:35:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 18:35:20,585 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-20 18:35:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:20,586 INFO L225 Difference]: With dead ends: 105 [2022-03-20 18:35:20,586 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 18:35:20,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=903, Invalid=6929, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 18:35:20,588 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 66 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:20,588 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 548 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:35:20,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 18:35:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2022-03-20 18:35:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-03-20 18:35:20,597 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 93 [2022-03-20 18:35:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:20,597 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-03-20 18:35:20,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 26 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-03-20 18:35:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 18:35:20,598 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:20,598 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:20,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 18:35:20,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 18:35:20,799 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:20,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1817219482, now seen corresponding path program 19 times [2022-03-20 18:35:20,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:20,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [299594678] [2022-03-20 18:35:20,799 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:35:20,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1817219482, now seen corresponding path program 20 times [2022-03-20 18:35:20,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:20,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639178705] [2022-03-20 18:35:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:20,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:21,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:21,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:21,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639178705] [2022-03-20 18:35:21,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639178705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:35:21,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573511865] [2022-03-20 18:35:21,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:35:21,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:21,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:35:21,269 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:35:21,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 18:35:21,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:35:21,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:35:21,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 18:35:21,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:35:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:21,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:35:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:22,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573511865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:35:22,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:35:22,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 50 [2022-03-20 18:35:22,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:22,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [299594678] [2022-03-20 18:35:22,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [299594678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:22,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:22,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 18:35:22,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053456092] [2022-03-20 18:35:22,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:22,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 18:35:22,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:22,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 18:35:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=1858, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 18:35:22,803 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:23,840 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-03-20 18:35:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 18:35:23,841 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-03-20 18:35:23,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:23,841 INFO L225 Difference]: With dead ends: 110 [2022-03-20 18:35:23,841 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 18:35:23,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=997, Invalid=3425, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 18:35:23,842 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 69 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:23,843 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 636 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:35:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 18:35:23,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2022-03-20 18:35:23,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-03-20 18:35:23,852 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 98 [2022-03-20 18:35:23,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:23,852 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-03-20 18:35:23,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 27 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-03-20 18:35:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 18:35:23,853 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:23,853 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:23,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 18:35:24,065 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,SelfDestructingSolverStorable10 [2022-03-20 18:35:24,065 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:24,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:24,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1265920281, now seen corresponding path program 21 times [2022-03-20 18:35:24,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:24,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1110330441] [2022-03-20 18:35:24,066 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:35:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1265920281, now seen corresponding path program 22 times [2022-03-20 18:35:24,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:24,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596654633] [2022-03-20 18:35:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:24,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:24,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:24,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:24,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596654633] [2022-03-20 18:35:24,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596654633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:35:24,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138999559] [2022-03-20 18:35:24,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:35:24,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:24,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:35:24,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:35:24,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 18:35:24,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:35:24,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:35:24,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 18:35:24,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:35:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:24,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:35:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:25,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138999559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:35:25,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:35:25,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 52 [2022-03-20 18:35:25,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:25,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1110330441] [2022-03-20 18:35:25,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1110330441] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:25,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:25,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 18:35:25,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225637775] [2022-03-20 18:35:25,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:25,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 18:35:25,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:25,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 18:35:25,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=2011, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:35:25,611 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:26,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:26,761 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2022-03-20 18:35:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 18:35:26,761 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-03-20 18:35:26,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:26,762 INFO L225 Difference]: With dead ends: 115 [2022-03-20 18:35:26,762 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 18:35:26,763 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:35:26,764 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1879 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:26,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 673 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1879 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:35:26,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 18:35:26,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-20 18:35:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-03-20 18:35:26,772 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 103 [2022-03-20 18:35:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:26,772 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-03-20 18:35:26,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 28 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-03-20 18:35:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 18:35:26,773 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:26,773 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:26,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 18:35:26,988 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,SelfDestructingSolverStorable11 [2022-03-20 18:35:26,988 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:26,988 INFO L85 PathProgramCache]: Analyzing trace with hash 618031354, now seen corresponding path program 23 times [2022-03-20 18:35:26,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:26,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [387057366] [2022-03-20 18:35:26,989 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:35:26,989 INFO L85 PathProgramCache]: Analyzing trace with hash 618031354, now seen corresponding path program 24 times [2022-03-20 18:35:26,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:26,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184233993] [2022-03-20 18:35:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:26,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:27,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:27,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:27,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184233993] [2022-03-20 18:35:27,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184233993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:35:27,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685922218] [2022-03-20 18:35:27,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:35:27,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:27,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:35:27,465 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:35:27,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 18:35:30,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:35:30,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:35:30,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 18:35:30,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:35:31,506 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:35:31,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 26 [2022-03-20 18:35:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-03-20 18:35:31,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:35:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-03-20 18:35:34,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685922218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:35:34,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:35:34,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 9, 9] total 44 [2022-03-20 18:35:34,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:34,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [387057366] [2022-03-20 18:35:34,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [387057366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:34,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:34,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 18:35:34,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663466211] [2022-03-20 18:35:34,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:34,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 18:35:34,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:34,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 18:35:34,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:35:34,067 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:35,353 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-03-20 18:35:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 18:35:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-03-20 18:35:35,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:35,354 INFO L225 Difference]: With dead ends: 120 [2022-03-20 18:35:35,354 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 18:35:35,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=398, Invalid=3508, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 18:35:35,355 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:35,355 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 726 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:35:35,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 18:35:35,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-03-20 18:35:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-03-20 18:35:35,363 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 108 [2022-03-20 18:35:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:35,363 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-03-20 18:35:35,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-03-20 18:35:35,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 18:35:35,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:35,364 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:35,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 18:35:35,580 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,SelfDestructingSolverStorable12 [2022-03-20 18:35:35,581 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:35,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1546768967, now seen corresponding path program 25 times [2022-03-20 18:35:35,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:35,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [108111271] [2022-03-20 18:35:35,581 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:35:35,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1546768967, now seen corresponding path program 26 times [2022-03-20 18:35:35,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:35,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705551196] [2022-03-20 18:35:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:35,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:35,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:35,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:35,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705551196] [2022-03-20 18:35:35,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705551196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:35:35,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960256939] [2022-03-20 18:35:35,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:35:35,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:35,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:35:35,953 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:35:35,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 18:35:36,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:35:36,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:35:36,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 18:35:36,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:35:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:36,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:35:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:37,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960256939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:35:37,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:35:37,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 56 [2022-03-20 18:35:37,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:37,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [108111271] [2022-03-20 18:35:37,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [108111271] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:37,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:37,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 18:35:37,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575743850] [2022-03-20 18:35:37,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:37,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 18:35:37,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:37,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 18:35:37,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=2341, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 18:35:37,371 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:38,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:38,352 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2022-03-20 18:35:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 18:35:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-03-20 18:35:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:38,353 INFO L225 Difference]: With dead ends: 125 [2022-03-20 18:35:38,353 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 18:35:38,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1270, Invalid=4430, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:35:38,354 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 75 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 2285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:38,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 775 Invalid, 2285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2241 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:35:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 18:35:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2022-03-20 18:35:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 115 states have (on average 1.008695652173913) internal successors, (116), 115 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-03-20 18:35:38,362 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 113 [2022-03-20 18:35:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:38,363 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-03-20 18:35:38,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-03-20 18:35:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 18:35:38,365 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:38,365 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:38,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 18:35:38,566 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,SelfDestructingSolverStorable13 [2022-03-20 18:35:38,566 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:38,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:38,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1560377254, now seen corresponding path program 27 times [2022-03-20 18:35:38,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:38,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [13753067] [2022-03-20 18:35:38,568 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:35:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1560377254, now seen corresponding path program 28 times [2022-03-20 18:35:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:38,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438229869] [2022-03-20 18:35:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:39,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:39,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:39,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438229869] [2022-03-20 18:35:39,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438229869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:35:39,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651561017] [2022-03-20 18:35:39,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:35:39,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:39,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:35:39,236 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:35:39,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 18:35:39,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:35:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:35:39,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 18:35:39,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:35:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:39,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:35:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:41,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651561017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:35:41,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:35:41,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27, 27] total 58 [2022-03-20 18:35:41,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:41,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [13753067] [2022-03-20 18:35:41,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [13753067] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:41,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:41,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 18:35:41,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998872049] [2022-03-20 18:35:41,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:41,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 18:35:41,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:41,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 18:35:41,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2521, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:35:41,033 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:42,053 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-03-20 18:35:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 18:35:42,053 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-03-20 18:35:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:42,054 INFO L225 Difference]: With dead ends: 130 [2022-03-20 18:35:42,054 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 18:35:42,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1355, Invalid=4807, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 18:35:42,057 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 75 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:42,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 838 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:35:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 18:35:42,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-03-20 18:35:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2022-03-20 18:35:42,068 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 118 [2022-03-20 18:35:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:42,069 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2022-03-20 18:35:42,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2022-03-20 18:35:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 18:35:42,076 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:42,076 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:42,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 18:35:42,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:42,291 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:42,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1219668569, now seen corresponding path program 29 times [2022-03-20 18:35:42,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:42,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [606376838] [2022-03-20 18:35:42,292 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:35:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1219668569, now seen corresponding path program 30 times [2022-03-20 18:35:42,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:42,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717400244] [2022-03-20 18:35:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:42,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:42,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:42,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:42,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717400244] [2022-03-20 18:35:42,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717400244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:35:42,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243054264] [2022-03-20 18:35:42,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:35:42,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:42,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:35:42,870 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:35:42,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 18:35:46,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:35:46,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:35:46,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-20 18:35:46,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:35:59,764 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:35:59,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 210 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 155 treesize of output 239 [2022-03-20 18:36:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 59 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2022-03-20 18:36:11,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:36:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2022-03-20 18:36:16,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243054264] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:36:16,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:36:16,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 22, 20] total 71 [2022-03-20 18:36:16,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:36:16,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [606376838] [2022-03-20 18:36:16,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [606376838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:16,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:16,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 18:36:16,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981497537] [2022-03-20 18:36:16,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:36:16,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 18:36:16,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:16,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 18:36:16,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=4352, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 18:36:16,639 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 32 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:36:18,334 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2022-03-20 18:36:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 18:36:18,334 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 32 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-03-20 18:36:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:36:18,335 INFO L225 Difference]: With dead ends: 135 [2022-03-20 18:36:18,335 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 18:36:18,337 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 206 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=815, Invalid=7741, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 18:36:18,337 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 76 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 2639 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:36:18,337 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 897 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2639 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:36:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 18:36:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2022-03-20 18:36:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.008) internal successors, (126), 125 states have internal predecessors, (126), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2022-03-20 18:36:18,356 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 123 [2022-03-20 18:36:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:36:18,356 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2022-03-20 18:36:18,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 32 states have internal predecessors, (120), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2022-03-20 18:36:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 18:36:18,357 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:36:18,357 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:36:18,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 18:36:18,568 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,SelfDestructingSolverStorable15 [2022-03-20 18:36:18,568 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:36:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:36:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash 378466234, now seen corresponding path program 31 times [2022-03-20 18:36:18,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:18,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [968341450] [2022-03-20 18:36:18,569 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:36:18,569 INFO L85 PathProgramCache]: Analyzing trace with hash 378466234, now seen corresponding path program 32 times [2022-03-20 18:36:18,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:36:18,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95977351] [2022-03-20 18:36:18,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:36:18,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:36:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:19,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:36:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:19,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:36:19,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95977351] [2022-03-20 18:36:19,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95977351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:36:19,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829166509] [2022-03-20 18:36:19,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:36:19,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:36:19,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:36:19,169 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:36:19,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 18:36:19,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:36:19,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:36:19,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1455 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 18:36:19,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:36:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:20,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:36:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:21,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829166509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:36:21,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:36:21,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 29, 29] total 62 [2022-03-20 18:36:21,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:36:21,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [968341450] [2022-03-20 18:36:21,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [968341450] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:21,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:21,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 18:36:21,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40816648] [2022-03-20 18:36:21,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:36:21,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 18:36:21,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 18:36:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=2911, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 18:36:21,330 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 33 states have internal predecessors, (125), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:23,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:36:23,080 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-03-20 18:36:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 18:36:23,080 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 33 states have internal predecessors, (125), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-03-20 18:36:23,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:36:23,081 INFO L225 Difference]: With dead ends: 140 [2022-03-20 18:36:23,081 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 18:36:23,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1513, Invalid=5627, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 18:36:23,082 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 2946 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 2996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:36:23,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 984 Invalid, 2996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2946 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 18:36:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 18:36:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-03-20 18:36:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:23,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2022-03-20 18:36:23,107 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 128 [2022-03-20 18:36:23,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:36:23,108 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2022-03-20 18:36:23,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.676470588235294) internal successors, (125), 33 states have internal predecessors, (125), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:23,108 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2022-03-20 18:36:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 18:36:23,110 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:36:23,110 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:36:23,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 18:36:23,311 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,SelfDestructingSolverStorable16 [2022-03-20 18:36:23,311 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:36:23,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:36:23,311 INFO L85 PathProgramCache]: Analyzing trace with hash -165945607, now seen corresponding path program 33 times [2022-03-20 18:36:23,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:23,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1220183895] [2022-03-20 18:36:23,312 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:36:23,312 INFO L85 PathProgramCache]: Analyzing trace with hash -165945607, now seen corresponding path program 34 times [2022-03-20 18:36:23,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:36:23,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860424376] [2022-03-20 18:36:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:36:23,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:36:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:24,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:36:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:24,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:36:24,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860424376] [2022-03-20 18:36:24,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860424376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:36:24,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412836919] [2022-03-20 18:36:24,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:36:24,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:36:24,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:36:24,125 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:36:24,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 18:36:24,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:36:24,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:36:24,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1493 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 18:36:24,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:36:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:24,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:36:26,158 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:26,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412836919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:36:26,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:36:26,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 30, 30] total 64 [2022-03-20 18:36:26,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:36:26,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1220183895] [2022-03-20 18:36:26,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1220183895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:26,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:26,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 18:36:26,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898523668] [2022-03-20 18:36:26,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:36:26,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 18:36:26,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:26,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 18:36:26,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=3121, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:36:26,160 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand has 35 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 34 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:36:27,623 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2022-03-20 18:36:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 18:36:27,623 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 34 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-03-20 18:36:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:36:27,624 INFO L225 Difference]: With dead ends: 145 [2022-03-20 18:36:27,624 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 18:36:27,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1586, Invalid=6070, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:36:27,625 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 81 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 3067 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 3119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 3067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:36:27,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1021 Invalid, 3119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 3067 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:36:27,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 18:36:27,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-03-20 18:36:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 135 states have internal predecessors, (136), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:27,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2022-03-20 18:36:27,635 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 133 [2022-03-20 18:36:27,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:36:27,635 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2022-03-20 18:36:27,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 34 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2022-03-20 18:36:27,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 18:36:27,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:36:27,636 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:36:27,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-20 18:36:27,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 18:36:27,851 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:36:27,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:36:27,852 INFO L85 PathProgramCache]: Analyzing trace with hash 802004762, now seen corresponding path program 35 times [2022-03-20 18:36:27,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:27,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [442685224] [2022-03-20 18:36:27,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:36:27,852 INFO L85 PathProgramCache]: Analyzing trace with hash 802004762, now seen corresponding path program 36 times [2022-03-20 18:36:27,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:36:27,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853803981] [2022-03-20 18:36:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:36:27,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:36:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:28,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:36:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:28,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:36:28,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853803981] [2022-03-20 18:36:28,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853803981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:36:28,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696444829] [2022-03-20 18:36:28,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:36:28,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:36:28,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:36:28,349 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:36:28,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 18:36:31,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:36:31,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:36:31,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 163 conjunts are in the unsatisfiable core [2022-03-20 18:36:31,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:37:12,933 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:37:12,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 42 select indices, 42 select index equivalence classes, 820 disjoint index pairs (out of 861 index pairs), introduced 42 new quantified variables, introduced 861 case distinctions, treesize of input 295 treesize of output 459 [2022-03-20 18:39:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 51 proven. 71 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2022-03-20 18:39:07,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:39:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2022-03-20 18:39:13,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696444829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:39:13,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:39:13,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 23, 21] total 76 [2022-03-20 18:39:13,383 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:39:13,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [442685224] [2022-03-20 18:39:13,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [442685224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:39:13,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:39:13,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 18:39:13,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246211702] [2022-03-20 18:39:13,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:39:13,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 18:39:13,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:39:13,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 18:39:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=4998, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:39:13,384 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 36 states, 36 states have (on average 3.75) internal successors, (135), 35 states have internal predecessors, (135), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:39:15,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:39:15,660 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-03-20 18:39:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 18:39:15,660 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.75) internal successors, (135), 35 states have internal predecessors, (135), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-03-20 18:39:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:39:15,661 INFO L225 Difference]: With dead ends: 150 [2022-03-20 18:39:15,661 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 18:39:15,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=926, Invalid=9174, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 18:39:15,662 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 84 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:39:15,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1083 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 18:39:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 18:39:15,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2022-03-20 18:39:15,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:39:15,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2022-03-20 18:39:15,674 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 138 [2022-03-20 18:39:15,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:39:15,674 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2022-03-20 18:39:15,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.75) internal successors, (135), 35 states have internal predecessors, (135), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:39:15,674 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2022-03-20 18:39:15,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:39:15,674 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:39:15,675 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:39:15,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 18:39:15,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:39:15,884 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:39:15,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:39:15,884 INFO L85 PathProgramCache]: Analyzing trace with hash 931384217, now seen corresponding path program 37 times [2022-03-20 18:39:15,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:39:15,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [579455373] [2022-03-20 18:39:15,887 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:39:15,888 INFO L85 PathProgramCache]: Analyzing trace with hash 931384217, now seen corresponding path program 38 times [2022-03-20 18:39:15,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:39:15,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476276328] [2022-03-20 18:39:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:39:15,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:39:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:39:16,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:39:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:39:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:16,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:39:16,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476276328] [2022-03-20 18:39:16,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476276328] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:39:16,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62025248] [2022-03-20 18:39:16,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:39:16,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:39:16,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:39:16,454 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:39:16,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 18:39:16,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:39:16,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:39:16,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 18:39:16,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:39:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:17,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:39:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:18,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62025248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:39:18,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:39:18,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 32, 32] total 68 [2022-03-20 18:39:18,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:39:18,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [579455373] [2022-03-20 18:39:18,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [579455373] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:39:18,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:39:18,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 18:39:18,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084206004] [2022-03-20 18:39:18,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:39:18,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 18:39:18,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:39:18,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 18:39:18,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=985, Invalid=3571, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 18:39:18,126 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 36 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:39:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:39:19,988 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2022-03-20 18:39:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 18:39:19,989 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 36 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 18:39:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:39:19,989 INFO L225 Difference]: With dead ends: 155 [2022-03-20 18:39:19,989 INFO L226 Difference]: Without dead ends: 152 [2022-03-20 18:39:19,990 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1720, Invalid=7022, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 18:39:19,990 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 84 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 3526 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 3582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:39:19,991 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1150 Invalid, 3582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3526 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 18:39:19,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-20 18:39:20,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2022-03-20 18:39:20,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.006896551724138) internal successors, (146), 145 states have internal predecessors, (146), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:39:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2022-03-20 18:39:20,009 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 143 [2022-03-20 18:39:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:39:20,009 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2022-03-20 18:39:20,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 36 states have internal predecessors, (140), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:39:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2022-03-20 18:39:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-20 18:39:20,010 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:39:20,010 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:39:20,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 18:39:20,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:39:20,222 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:39:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:39:20,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2139133562, now seen corresponding path program 39 times [2022-03-20 18:39:20,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:39:20,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2054022344] [2022-03-20 18:39:20,223 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:39:20,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2139133562, now seen corresponding path program 40 times [2022-03-20 18:39:20,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:39:20,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642706070] [2022-03-20 18:39:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:39:20,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:39:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:39:20,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:39:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:39:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:20,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:39:20,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642706070] [2022-03-20 18:39:20,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642706070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:39:20,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411121684] [2022-03-20 18:39:20,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:39:20,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:39:20,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:39:20,996 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:39:20,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 18:39:21,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:39:21,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:39:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 18:39:21,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:39:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:22,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:39:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:23,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411121684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:39:23,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:39:23,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 33, 33] total 70 [2022-03-20 18:39:23,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:39:23,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2054022344] [2022-03-20 18:39:23,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2054022344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:39:23,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:39:23,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 18:39:23,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710815662] [2022-03-20 18:39:23,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:39:23,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 18:39:23,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:39:23,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 18:39:23,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=3811, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:39:23,537 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 38 states, 38 states have (on average 3.8157894736842106) internal successors, (145), 37 states have internal predecessors, (145), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:39:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:39:25,710 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2022-03-20 18:39:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 18:39:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8157894736842106) internal successors, (145), 37 states have internal predecessors, (145), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2022-03-20 18:39:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:39:25,711 INFO L225 Difference]: With dead ends: 160 [2022-03-20 18:39:25,711 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 18:39:25,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1781, Invalid=7531, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 18:39:25,712 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 87 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 3769 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:39:25,712 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1222 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3769 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 18:39:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 18:39:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2022-03-20 18:39:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:39:25,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2022-03-20 18:39:25,725 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 148 [2022-03-20 18:39:25,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:39:25,725 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2022-03-20 18:39:25,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8157894736842106) internal successors, (145), 37 states have internal predecessors, (145), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:39:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2022-03-20 18:39:25,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 18:39:25,726 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:39:25,726 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:39:25,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 18:39:25,948 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,SelfDestructingSolverStorable20 [2022-03-20 18:39:25,948 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:39:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:39:25,948 INFO L85 PathProgramCache]: Analyzing trace with hash 132411449, now seen corresponding path program 41 times [2022-03-20 18:39:25,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:39:25,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1534988210] [2022-03-20 18:39:25,949 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:39:25,949 INFO L85 PathProgramCache]: Analyzing trace with hash 132411449, now seen corresponding path program 42 times [2022-03-20 18:39:25,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:39:25,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465034712] [2022-03-20 18:39:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:39:25,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:39:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:39:26,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:39:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:39:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:26,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:39:26,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465034712] [2022-03-20 18:39:26,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465034712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:39:26,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547038187] [2022-03-20 18:39:26,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:39:26,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:39:26,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:39:26,682 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:39:26,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 18:39:37,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:39:37,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:39:37,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 126 conjunts are in the unsatisfiable core [2022-03-20 18:39:37,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:40:01,255 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:40:01,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 25 select indices, 25 select index equivalence classes, 276 disjoint index pairs (out of 300 index pairs), introduced 25 new quantified variables, introduced 300 case distinctions, treesize of input 176 treesize of output 268 [2022-03-20 18:40:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 60 proven. 83 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2022-03-20 18:40:26,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:40:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2022-03-20 18:40:31,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547038187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:40:31,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:40:31,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 21, 20] total 76 [2022-03-20 18:40:31,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:40:31,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1534988210] [2022-03-20 18:40:31,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1534988210] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:40:31,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:40:31,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 18:40:31,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914123239] [2022-03-20 18:40:31,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:40:31,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 18:40:31,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:40:31,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 18:40:31,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=5053, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:40:31,736 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:40:34,333 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2022-03-20 18:40:34,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 18:40:34,334 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-03-20 18:40:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:40:34,334 INFO L225 Difference]: With dead ends: 165 [2022-03-20 18:40:34,334 INFO L226 Difference]: Without dead ends: 162 [2022-03-20 18:40:34,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 268 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=896, Invalid=9816, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:40:34,335 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 88 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 3901 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 3961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:40:34,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1259 Invalid, 3961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3901 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 18:40:34,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-20 18:40:34,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2022-03-20 18:40:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 155 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:34,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2022-03-20 18:40:34,348 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 153 [2022-03-20 18:40:34,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:40:34,349 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2022-03-20 18:40:34,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8461538461538463) internal successors, (150), 38 states have internal predecessors, (150), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:34,349 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2022-03-20 18:40:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-20 18:40:34,349 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:40:34,349 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:40:34,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 18:40:34,572 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,SelfDestructingSolverStorable21 [2022-03-20 18:40:34,572 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:40:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:40:34,572 INFO L85 PathProgramCache]: Analyzing trace with hash -689056294, now seen corresponding path program 43 times [2022-03-20 18:40:34,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:40:34,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900922061] [2022-03-20 18:40:34,573 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:40:34,573 INFO L85 PathProgramCache]: Analyzing trace with hash -689056294, now seen corresponding path program 44 times [2022-03-20 18:40:34,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:40:34,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275872691] [2022-03-20 18:40:34,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:40:34,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:40:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:40:35,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:40:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:40:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:40:35,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:40:35,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275872691] [2022-03-20 18:40:35,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275872691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:40:35,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568113255] [2022-03-20 18:40:35,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:40:35,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:40:35,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:40:35,344 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:40:35,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 18:40:35,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:40:35,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:40:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 18:40:35,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:40:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:40:36,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:40:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:40:38,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568113255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:40:38,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:40:38,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 35, 35] total 74 [2022-03-20 18:40:38,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:40:38,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900922061] [2022-03-20 18:40:38,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900922061] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:40:38,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:40:38,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 18:40:38,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120355450] [2022-03-20 18:40:38,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:40:38,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 18:40:38,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:40:38,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 18:40:38,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=4321, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 18:40:38,335 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 40 states, 40 states have (on average 3.875) internal successors, (155), 39 states have internal predecessors, (155), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:40:40,554 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2022-03-20 18:40:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 18:40:40,554 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.875) internal successors, (155), 39 states have internal predecessors, (155), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-03-20 18:40:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:40:40,555 INFO L225 Difference]: With dead ends: 170 [2022-03-20 18:40:40,555 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 18:40:40,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1891, Invalid=8615, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 18:40:40,556 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 93 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 4396 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 4458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 4396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:40:40,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1392 Invalid, 4458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 4396 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 18:40:40,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 18:40:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2022-03-20 18:40:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2022-03-20 18:40:40,571 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 158 [2022-03-20 18:40:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:40:40,572 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2022-03-20 18:40:40,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.875) internal successors, (155), 39 states have internal predecessors, (155), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2022-03-20 18:40:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 18:40:40,572 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:40:40,572 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:40:40,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 18:40:40,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:40:40,793 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:40:40,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:40:40,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1907870937, now seen corresponding path program 45 times [2022-03-20 18:40:40,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:40:40,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [237992224] [2022-03-20 18:40:40,794 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:40:40,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1907870937, now seen corresponding path program 46 times [2022-03-20 18:40:40,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:40:40,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305878787] [2022-03-20 18:40:40,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:40:40,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:40:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:40:41,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:40:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:40:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:40:41,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:40:41,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305878787] [2022-03-20 18:40:41,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305878787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:40:41,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597789765] [2022-03-20 18:40:41,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:40:41,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:40:41,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:40:41,561 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:40:41,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 18:40:42,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:40:42,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:40:42,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 18:40:42,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:40:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:40:42,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:40:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:40:43,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597789765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:40:43,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:40:43,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36, 36] total 76 [2022-03-20 18:40:43,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:40:43,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [237992224] [2022-03-20 18:40:43,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [237992224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:40:43,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:40:43,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 18:40:43,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488572952] [2022-03-20 18:40:43,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:40:43,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 18:40:43,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:40:43,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 18:40:43,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=4591, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:40:43,710 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 40 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:40:45,696 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2022-03-20 18:40:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 18:40:45,697 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 40 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-03-20 18:40:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:40:45,697 INFO L225 Difference]: With dead ends: 175 [2022-03-20 18:40:45,697 INFO L226 Difference]: Without dead ends: 172 [2022-03-20 18:40:45,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1940, Invalid=9190, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 18:40:45,698 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 92 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 4543 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 4607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:40:45,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1441 Invalid, 4607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4543 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 18:40:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-20 18:40:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2022-03-20 18:40:45,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 states have internal predecessors, (166), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2022-03-20 18:40:45,713 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 163 [2022-03-20 18:40:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:40:45,713 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2022-03-20 18:40:45,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 40 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:45,713 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2022-03-20 18:40:45,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-20 18:40:45,713 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:40:45,714 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:40:45,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 18:40:45,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:40:45,919 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:40:45,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:40:45,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1478795974, now seen corresponding path program 47 times [2022-03-20 18:40:45,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:40:45,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [797939611] [2022-03-20 18:40:45,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:40:45,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1478795974, now seen corresponding path program 48 times [2022-03-20 18:40:45,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:40:45,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46616321] [2022-03-20 18:40:45,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:40:45,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:40:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:40:46,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:40:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:40:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:40:46,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:40:46,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46616321] [2022-03-20 18:40:46,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46616321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:40:46,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426911571] [2022-03-20 18:40:46,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:40:46,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:40:46,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:40:46,478 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:40:46,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 18:40:47,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:40:47,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:40:47,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 18:40:47,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:40:47,655 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:40:47,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-03-20 18:40:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 69 proven. 95 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2022-03-20 18:40:47,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:40:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2022-03-20 18:40:51,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426911571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:40:51,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:40:51,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 9, 9] total 56 [2022-03-20 18:40:51,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:40:51,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [797939611] [2022-03-20 18:40:51,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [797939611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:40:51,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:40:51,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 18:40:51,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432090561] [2022-03-20 18:40:51,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:40:51,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 18:40:51,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:40:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 18:40:51,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2777, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 18:40:51,135 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 42 states, 42 states have (on average 3.9285714285714284) internal successors, (165), 41 states have internal predecessors, (165), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:53,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:40:53,729 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2022-03-20 18:40:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 18:40:53,729 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.9285714285714284) internal successors, (165), 41 states have internal predecessors, (165), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-03-20 18:40:53,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:40:53,730 INFO L225 Difference]: With dead ends: 180 [2022-03-20 18:40:53,730 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 18:40:53,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=578, Invalid=6904, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 18:40:53,731 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 96 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 4816 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 4882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 4816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:40:53,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1515 Invalid, 4882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 4816 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 18:40:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 18:40:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-03-20 18:40:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2022-03-20 18:40:53,747 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 168 [2022-03-20 18:40:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:40:53,747 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2022-03-20 18:40:53,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.9285714285714284) internal successors, (165), 41 states have internal predecessors, (165), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2022-03-20 18:40:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 18:40:53,748 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:40:53,748 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:40:53,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 18:40:53,963 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,SelfDestructingSolverStorable24 [2022-03-20 18:40:53,963 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:40:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:40:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash 787997049, now seen corresponding path program 49 times [2022-03-20 18:40:53,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:40:53,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [862382736] [2022-03-20 18:40:53,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:40:53,964 INFO L85 PathProgramCache]: Analyzing trace with hash 787997049, now seen corresponding path program 50 times [2022-03-20 18:40:53,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:40:53,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390047306] [2022-03-20 18:40:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:40:53,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:40:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:40:54,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:40:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:40:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:40:54,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:40:54,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390047306] [2022-03-20 18:40:54,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390047306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:40:54,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020670574] [2022-03-20 18:40:54,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:40:54,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:40:54,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:40:54,733 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:40:54,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 18:40:55,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:40:55,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:40:55,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 18:40:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:40:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:40:55,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:40:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:40:56,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020670574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:40:56,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:40:56,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 38, 38] total 80 [2022-03-20 18:40:56,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:40:56,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [862382736] [2022-03-20 18:40:56,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [862382736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:40:56,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:40:56,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 18:40:56,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757259731] [2022-03-20 18:40:56,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:40:56,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 18:40:56,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:40:56,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 18:40:56,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1158, Invalid=5162, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 18:40:56,937 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand has 43 states, 43 states have (on average 3.953488372093023) internal successors, (170), 42 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:59,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:40:59,257 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2022-03-20 18:40:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 18:40:59,257 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.953488372093023) internal successors, (170), 42 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-20 18:40:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:40:59,258 INFO L225 Difference]: With dead ends: 185 [2022-03-20 18:40:59,258 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 18:40:59,259 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2026, Invalid=10406, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 18:40:59,259 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 99 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 4831 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 4899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 4831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:40:59,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1521 Invalid, 4899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 4831 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 18:40:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 18:40:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2022-03-20 18:40:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 175 states have (on average 1.0057142857142858) internal successors, (176), 175 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2022-03-20 18:40:59,275 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 173 [2022-03-20 18:40:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:40:59,275 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2022-03-20 18:40:59,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.953488372093023) internal successors, (170), 42 states have internal predecessors, (170), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2022-03-20 18:40:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-03-20 18:40:59,276 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:40:59,276 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:40:59,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 18:40:59,496 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,SelfDestructingSolverStorable25 [2022-03-20 18:40:59,496 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:40:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:40:59,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1687104666, now seen corresponding path program 51 times [2022-03-20 18:40:59,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:40:59,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1199109918] [2022-03-20 18:40:59,498 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:40:59,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1687104666, now seen corresponding path program 52 times [2022-03-20 18:40:59,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:40:59,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736750417] [2022-03-20 18:40:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:40:59,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:40:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:41:00,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:41:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:41:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:41:00,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:41:00,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736750417] [2022-03-20 18:41:00,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736750417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:41:00,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804392373] [2022-03-20 18:41:00,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:41:00,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:41:00,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:41:00,208 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:41:00,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 18:41:00,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:41:00,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:41:00,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 18:41:00,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:41:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:41:01,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:41:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:41:02,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804392373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:41:02,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:41:02,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 39, 39] total 82 [2022-03-20 18:41:02,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:41:02,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1199109918] [2022-03-20 18:41:02,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1199109918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:41:02,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:41:02,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 18:41:02,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918885273] [2022-03-20 18:41:02,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:41:02,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 18:41:02,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:41:02,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 18:41:02,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=5463, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:41:02,680 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand has 44 states, 44 states have (on average 3.977272727272727) internal successors, (175), 43 states have internal predecessors, (175), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:05,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:41:05,501 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2022-03-20 18:41:05,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 18:41:05,501 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.977272727272727) internal successors, (175), 43 states have internal predecessors, (175), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-03-20 18:41:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:41:05,502 INFO L225 Difference]: With dead ends: 190 [2022-03-20 18:41:05,502 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 18:41:05,503 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2063, Invalid=11047, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 18:41:05,504 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 98 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 5389 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1678 SdHoareTripleChecker+Invalid, 5459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 5389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:41:05,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1678 Invalid, 5459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 5389 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 18:41:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 18:41:05,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-03-20 18:41:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 180 states have (on average 1.0055555555555555) internal successors, (181), 180 states have internal predecessors, (181), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:05,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2022-03-20 18:41:05,538 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 178 [2022-03-20 18:41:05,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:41:05,539 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2022-03-20 18:41:05,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.977272727272727) internal successors, (175), 43 states have internal predecessors, (175), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:05,539 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2022-03-20 18:41:05,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 18:41:05,539 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:41:05,539 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:41:05,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 18:41:05,742 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,SelfDestructingSolverStorable26 [2022-03-20 18:41:05,743 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:41:05,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:41:05,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1226747417, now seen corresponding path program 53 times [2022-03-20 18:41:05,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:41:05,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1766102189] [2022-03-20 18:41:05,744 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:41:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1226747417, now seen corresponding path program 54 times [2022-03-20 18:41:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:41:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808772210] [2022-03-20 18:41:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:41:05,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:41:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:41:06,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:41:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:41:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:41:06,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:41:06,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808772210] [2022-03-20 18:41:06,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808772210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:41:06,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396213118] [2022-03-20 18:41:06,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:41:06,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:41:06,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:41:06,676 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:41:06,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 18:41:10,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:41:10,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:41:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 18:41:10,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:41:17,251 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:41:17,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 64 treesize of output 96 [2022-03-20 18:41:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 78 proven. 107 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2022-03-20 18:41:17,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:41:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2022-03-20 18:41:23,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396213118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:41:23,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:41:23,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 22, 20] total 83 [2022-03-20 18:41:23,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:41:23,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1766102189] [2022-03-20 18:41:23,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1766102189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:41:23,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:41:23,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 18:41:23,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940888752] [2022-03-20 18:41:23,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:41:23,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 18:41:23,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:41:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 18:41:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=715, Invalid=6091, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 18:41:23,495 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand has 45 states, 45 states have (on average 4.0) internal successors, (180), 44 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:41:26,687 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2022-03-20 18:41:26,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 18:41:26,688 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.0) internal successors, (180), 44 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-03-20 18:41:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:41:26,689 INFO L225 Difference]: With dead ends: 195 [2022-03-20 18:41:26,689 INFO L226 Difference]: Without dead ends: 192 [2022-03-20 18:41:26,690 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 326 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1031, Invalid=12541, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 18:41:26,690 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 99 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 5829 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 5901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 5829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:41:26,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1801 Invalid, 5901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 5829 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 18:41:26,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-20 18:41:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2022-03-20 18:41:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 185 states have (on average 1.0054054054054054) internal successors, (186), 185 states have internal predecessors, (186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:26,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2022-03-20 18:41:26,711 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 183 [2022-03-20 18:41:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:41:26,712 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2022-03-20 18:41:26,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.0) internal successors, (180), 44 states have internal predecessors, (180), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2022-03-20 18:41:26,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-03-20 18:41:26,713 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:41:26,713 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:41:26,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 18:41:26,918 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,SelfDestructingSolverStorable27 [2022-03-20 18:41:26,918 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:41:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:41:26,918 INFO L85 PathProgramCache]: Analyzing trace with hash -540064774, now seen corresponding path program 55 times [2022-03-20 18:41:26,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:41:26,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [721188953] [2022-03-20 18:41:26,919 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:41:26,919 INFO L85 PathProgramCache]: Analyzing trace with hash -540064774, now seen corresponding path program 56 times [2022-03-20 18:41:26,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:41:26,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75214090] [2022-03-20 18:41:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:41:26,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:41:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:41:27,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:41:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:41:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:41:27,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:41:27,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75214090] [2022-03-20 18:41:27,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75214090] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:41:27,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824573649] [2022-03-20 18:41:27,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:41:27,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:41:27,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:41:27,894 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:41:27,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 18:41:28,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:41:28,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:41:28,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1911 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 18:41:28,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:41:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:41:29,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:41:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:41:31,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824573649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:41:31,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:41:31,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 41, 41] total 86 [2022-03-20 18:41:31,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:41:31,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [721188953] [2022-03-20 18:41:31,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [721188953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:41:31,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:41:31,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 18:41:31,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496388139] [2022-03-20 18:41:31,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:41:31,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 18:41:31,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:41:31,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 18:41:31,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=6096, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 18:41:31,645 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 45 states have internal predecessors, (185), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:41:35,064 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2022-03-20 18:41:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 18:41:35,064 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 45 states have internal predecessors, (185), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-03-20 18:41:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:41:35,065 INFO L225 Difference]: With dead ends: 200 [2022-03-20 18:41:35,065 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 18:41:35,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2125, Invalid=12395, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 18:41:35,066 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 101 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 6139 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 6213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 6139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:41:35,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1887 Invalid, 6213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 6139 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 18:41:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 18:41:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-03-20 18:41:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2022-03-20 18:41:35,084 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 188 [2022-03-20 18:41:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:41:35,084 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2022-03-20 18:41:35,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 45 states have internal predecessors, (185), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:35,085 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2022-03-20 18:41:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 18:41:35,085 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:41:35,085 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:41:35,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 18:41:35,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 18:41:35,307 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:41:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:41:35,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1188678983, now seen corresponding path program 57 times [2022-03-20 18:41:35,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:41:35,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [139543308] [2022-03-20 18:41:35,308 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:41:35,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1188678983, now seen corresponding path program 58 times [2022-03-20 18:41:35,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:41:35,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102228072] [2022-03-20 18:41:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:41:35,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:41:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:41:36,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:41:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:41:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:41:36,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:41:36,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102228072] [2022-03-20 18:41:36,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102228072] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:41:36,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090170387] [2022-03-20 18:41:36,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:41:36,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:41:36,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:41:36,271 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:41:36,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 18:41:36,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:41:36,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:41:36,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1949 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 18:41:36,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:41:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:41:37,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:41:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:41:38,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090170387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:41:38,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:41:38,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 42, 42] total 88 [2022-03-20 18:41:38,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:41:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [139543308] [2022-03-20 18:41:38,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [139543308] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:41:38,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:41:38,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 18:41:38,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705178159] [2022-03-20 18:41:38,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:41:38,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 18:41:38,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:41:38,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 18:41:38,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=6428, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:41:38,957 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand has 47 states, 47 states have (on average 4.042553191489362) internal successors, (190), 46 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:41:42,314 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2022-03-20 18:41:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 18:41:42,314 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.042553191489362) internal successors, (190), 46 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-03-20 18:41:42,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:41:42,315 INFO L225 Difference]: With dead ends: 205 [2022-03-20 18:41:42,315 INFO L226 Difference]: Without dead ends: 202 [2022-03-20 18:41:42,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2150, Invalid=13102, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 18:41:42,317 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 107 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 6156 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 6232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 6156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:41:42,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1888 Invalid, 6232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 6156 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 18:41:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-20 18:41:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2022-03-20 18:41:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 195 states have (on average 1.005128205128205) internal successors, (196), 195 states have internal predecessors, (196), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2022-03-20 18:41:42,344 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 193 [2022-03-20 18:41:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:41:42,344 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2022-03-20 18:41:42,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.042553191489362) internal successors, (190), 46 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:42,344 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2022-03-20 18:41:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-20 18:41:42,345 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:41:42,345 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:41:42,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 18:41:42,553 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:41:42,553 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:41:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:41:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1394498726, now seen corresponding path program 59 times [2022-03-20 18:41:42,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:41:42,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1970781989] [2022-03-20 18:41:42,554 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:41:42,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1394498726, now seen corresponding path program 60 times [2022-03-20 18:41:42,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:41:42,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732772699] [2022-03-20 18:41:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:41:42,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:41:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:41:43,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:41:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:41:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 2265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:41:43,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:41:43,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732772699] [2022-03-20 18:41:43,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732772699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:41:43,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54898327] [2022-03-20 18:41:43,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:41:43,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:41:43,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:41:43,442 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:41:43,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 18:41:44,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 18:41:44,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:41:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 18:41:44,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:41:44,711 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 18:41:44,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23