/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-7968f31 [2022-03-18 00:41:39,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:41:39,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:41:40,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:41:40,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 00:41:40,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 00:41:40,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 00:41:40,061 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:41:40,069 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:41:40,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:41:40,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:41:40,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:41:40,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:41:40,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:41:40,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:41:40,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:41:40,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:41:40,072 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:41:40,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:41:40,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:41:40,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:41:40,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:41:40,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:41:40,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:41:40,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:41:40,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:41:40,073 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:41:40,073 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:41:40,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:41:40,074 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:41:40,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:41:40,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:41:40,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:41:40,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:41:40,328 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:41:40,330 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:41:40,331 INFO L432 ainManager$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 [2022-03-18 00:41:40,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eae31649b/f9d7be485e63470085a601debead5773/FLAG13f7a15bf [2022-03-18 00:41:40,722 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:41:40,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2022-03-18 00:41:40,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eae31649b/f9d7be485e63470085a601debead5773/FLAG13f7a15bf [2022-03-18 00:41:41,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eae31649b/f9d7be485e63470085a601debead5773 [2022-03-18 00:41:41,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:41:41,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:41:41,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:41:41,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:41:41,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:41:41,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:41:41" (1/1) ... [2022-03-18 00:41:41,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bca1b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:41:41, skipping insertion in model container [2022-03-18 00:41:41,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:41:41" (1/1) ... [2022-03-18 00:41:41,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:41:41,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:41:41,392 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2022-03-18 00:41:41,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:41:41,413 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:41:41,478 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] [2022-03-18 00:41:41,485 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:41:41,496 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:41:41,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:41:41 WrapperNode [2022-03-18 00:41:41,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:41:41,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:41:41,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:41:41,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:41:41,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:41:41" (1/1) ... [2022-03-18 00:41:41,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:41:41" (1/1) ... [2022-03-18 00:41:41,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:41:41" (1/1) ... [2022-03-18 00:41:41,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:41:41" (1/1) ... [2022-03-18 00:41:41,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:41:41" (1/1) ... [2022-03-18 00:41:41,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:41:41" (1/1) ... [2022-03-18 00:41:41,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:41:41" (1/1) ... [2022-03-18 00:41:41,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:41:41,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:41:41,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:41:41,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:41:41,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:41:41" (1/1) ... [2022-03-18 00:41:41,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:41:41,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:41,621 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) [2022-03-18 00:41:41,633 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 [2022-03-18 00:41:41,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:41:41,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:41:41,670 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:41:41,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:41:41,671 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:41:41,671 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:41:41,672 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:41:41,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:41:41,672 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-03-18 00:41:41,672 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-03-18 00:41:41,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:41:41,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:41:41,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 00:41:41,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:41:41,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-03-18 00:41:41,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:41:41,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:41:41,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:41:41,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:41:41,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-03-18 00:41:41,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:41:41,840 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:41:41,841 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:41:42,386 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:41:42,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:41:42,393 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-18 00:41:42,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:41:42 BoogieIcfgContainer [2022-03-18 00:41:42,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:41:42,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:41:42,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:41:42,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:41:42,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:41:41" (1/3) ... [2022-03-18 00:41:42,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693d0cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:41:42, skipping insertion in model container [2022-03-18 00:41:42,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:41:41" (2/3) ... [2022-03-18 00:41:42,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693d0cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:41:42, skipping insertion in model container [2022-03-18 00:41:42,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:41:42" (3/3) ... [2022-03-18 00:41:42,403 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2022-03-18 00:41:42,406 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:41:42,407 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:41:42,455 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:41:42,465 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 [2022-03-18 00:41:42,465 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:41:42,480 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) [2022-03-18 00:41:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 00:41:42,489 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:42,489 INFO L500 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] [2022-03-18 00:41:42,490 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:42,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1054632774, now seen corresponding path program 1 times [2022-03-18 00:41:42,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:42,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1450440031] [2022-03-18 00:41:42,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:41:42,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1054632774, now seen corresponding path program 2 times [2022-03-18 00:41:42,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:42,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489701482] [2022-03-18 00:41:42,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:42,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:43,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:43,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:43,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489701482] [2022-03-18 00:41:43,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489701482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:43,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:43,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:41:43,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:43,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1450440031] [2022-03-18 00:41:43,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1450440031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:43,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:43,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:41:43,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988147644] [2022-03-18 00:41:43,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:43,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 00:41:43,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:43,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 00:41:43,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:41:43,387 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) [2022-03-18 00:41:44,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:44,109 INFO L93 Difference]: Finished difference Result 92 states and 136 transitions. [2022-03-18 00:41:44,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:41:44,113 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 [2022-03-18 00:41:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:44,123 INFO L225 Difference]: With dead ends: 92 [2022-03-18 00:41:44,123 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 00:41:44,126 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:41:44,128 INFO L912 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:41:44,129 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 717 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:41:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 00:41:44,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-03-18 00:41:44,188 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) [2022-03-18 00:41:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-03-18 00:41:44,190 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2022-03-18 00:41:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:44,191 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-03-18 00:41:44,191 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) [2022-03-18 00:41:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-03-18 00:41:44,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 00:41:44,192 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:44,192 INFO L500 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] [2022-03-18 00:41:44,193 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:41:44,193 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:44,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1470519801, now seen corresponding path program 1 times [2022-03-18 00:41:44,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:44,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1383187030] [2022-03-18 00:41:44,194 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:41:44,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1470519801, now seen corresponding path program 2 times [2022-03-18 00:41:44,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:44,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332046955] [2022-03-18 00:41:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:44,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:44,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:44,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:44,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332046955] [2022-03-18 00:41:44,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332046955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:41:44,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780529739] [2022-03-18 00:41:44,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:41:44,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:44,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:44,611 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) [2022-03-18 00:41:44,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 00:41:44,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:41:44,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:41:44,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 00:41:44,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:41:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:45,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:41:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:45,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780529739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:41:45,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:41:45,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 32 [2022-03-18 00:41:45,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:45,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1383187030] [2022-03-18 00:41:45,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1383187030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:45,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:45,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 00:41:45,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133955683] [2022-03-18 00:41:45,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:45,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 00:41:45,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:45,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 00:41:45,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:41:45,823 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) [2022-03-18 00:41:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:46,331 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-03-18 00:41:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 00:41:46,332 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 [2022-03-18 00:41:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:46,333 INFO L225 Difference]: With dead ends: 65 [2022-03-18 00:41:46,334 INFO L226 Difference]: Without dead ends: 62 [2022-03-18 00:41:46,335 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=358, Invalid=1202, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:41:46,336 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:41:46,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 239 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:41:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-18 00:41:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-03-18 00:41:46,346 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) [2022-03-18 00:41:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-03-18 00:41:46,347 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 53 [2022-03-18 00:41:46,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:46,347 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-03-18 00:41:46,348 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) [2022-03-18 00:41:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-03-18 00:41:46,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 00:41:46,349 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:46,349 INFO L500 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] [2022-03-18 00:41:46,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 00:41:46,550 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 [2022-03-18 00:41:46,550 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:46,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:46,551 INFO L85 PathProgramCache]: Analyzing trace with hash 412615706, now seen corresponding path program 3 times [2022-03-18 00:41:46,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:46,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1541137063] [2022-03-18 00:41:46,552 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:41:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash 412615706, now seen corresponding path program 4 times [2022-03-18 00:41:46,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:46,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784173763] [2022-03-18 00:41:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:46,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:46,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:46,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:46,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784173763] [2022-03-18 00:41:46,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784173763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:41:46,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141073842] [2022-03-18 00:41:46,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:41:46,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:46,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:46,988 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) [2022-03-18 00:41:47,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 00:41:47,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:41:47,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:41:47,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 00:41:47,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:41:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:47,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:41:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:47,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141073842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:41:47,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:41:47,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 34 [2022-03-18 00:41:47,957 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:47,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1541137063] [2022-03-18 00:41:47,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1541137063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:47,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:47,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 00:41:47,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750473382] [2022-03-18 00:41:47,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:47,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 00:41:47,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:47,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 00:41:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:41:47,960 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) [2022-03-18 00:41:48,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:48,518 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-03-18 00:41:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:41:48,518 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 [2022-03-18 00:41:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:48,519 INFO L225 Difference]: With dead ends: 70 [2022-03-18 00:41:48,519 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 00:41:48,521 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=413, Invalid=1393, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 00:41:48,522 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:41:48,522 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 292 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:41:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 00:41:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-03-18 00:41:48,532 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) [2022-03-18 00:41:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-03-18 00:41:48,533 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 58 [2022-03-18 00:41:48,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:48,533 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-03-18 00:41:48,533 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) [2022-03-18 00:41:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-03-18 00:41:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 00:41:48,535 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:48,535 INFO L500 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] [2022-03-18 00:41:48,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 00:41:48,743 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 [2022-03-18 00:41:48,744 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1771010407, now seen corresponding path program 5 times [2022-03-18 00:41:48,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:48,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1865653227] [2022-03-18 00:41:48,745 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:41:48,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1771010407, now seen corresponding path program 6 times [2022-03-18 00:41:48,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:48,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961664940] [2022-03-18 00:41:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:48,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:49,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:49,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:49,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961664940] [2022-03-18 00:41:49,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961664940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:41:49,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4422744] [2022-03-18 00:41:49,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:41:49,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:49,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:49,085 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) [2022-03-18 00:41:49,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 00:41:50,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 00:41:50,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:41:50,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 00:41:50,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:41:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:51,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:41:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:51,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4422744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:41:51,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:41:51,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 36 [2022-03-18 00:41:51,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:51,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1865653227] [2022-03-18 00:41:51,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1865653227] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:51,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:51,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 00:41:51,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689035968] [2022-03-18 00:41:51,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:51,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 00:41:51,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:51,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 00:41:51,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 00:41:51,667 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) [2022-03-18 00:41:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:52,294 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-03-18 00:41:52,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 00:41:52,294 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 [2022-03-18 00:41:52,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:52,296 INFO L225 Difference]: With dead ends: 75 [2022-03-18 00:41:52,296 INFO L226 Difference]: Without dead ends: 72 [2022-03-18 00:41:52,297 INFO L911 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 [2022-03-18 00:41:52,298 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:41:52,298 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 328 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:41:52,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-18 00:41:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-03-18 00:41:52,308 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) [2022-03-18 00:41:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-03-18 00:41:52,309 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 63 [2022-03-18 00:41:52,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:52,309 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-03-18 00:41:52,310 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) [2022-03-18 00:41:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-03-18 00:41:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 00:41:52,311 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:52,311 INFO L500 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] [2022-03-18 00:41:52,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 00:41:52,515 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 [2022-03-18 00:41:52,516 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:52,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1370440838, now seen corresponding path program 7 times [2022-03-18 00:41:52,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:52,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1348464079] [2022-03-18 00:41:52,517 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:41:52,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1370440838, now seen corresponding path program 8 times [2022-03-18 00:41:52,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:52,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624715816] [2022-03-18 00:41:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:52,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:52,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:52,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:52,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624715816] [2022-03-18 00:41:52,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624715816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:41:52,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862435296] [2022-03-18 00:41:52,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:41:52,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:52,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:52,880 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) [2022-03-18 00:41:52,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 00:41:53,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:41:53,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:41:53,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 00:41:53,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:41:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:53,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:41:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:54,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862435296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:41:54,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:41:54,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 38 [2022-03-18 00:41:54,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:54,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1348464079] [2022-03-18 00:41:54,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1348464079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:54,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:54,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 00:41:54,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364306166] [2022-03-18 00:41:54,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:54,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 00:41:54,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:54,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 00:41:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 00:41:54,064 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) [2022-03-18 00:41:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:54,750 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-03-18 00:41:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 00:41:54,750 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 [2022-03-18 00:41:54,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:54,751 INFO L225 Difference]: With dead ends: 80 [2022-03-18 00:41:54,751 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 00:41:54,752 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 00:41:54,753 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:41:54,754 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 352 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:41:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 00:41:54,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-03-18 00:41:54,763 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) [2022-03-18 00:41:54,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-03-18 00:41:54,764 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 68 [2022-03-18 00:41:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:54,764 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-03-18 00:41:54,765 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) [2022-03-18 00:41:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-03-18 00:41:54,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 00:41:54,766 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:54,766 INFO L500 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] [2022-03-18 00:41:54,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 00:41:54,979 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 [2022-03-18 00:41:54,979 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:54,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:54,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1100780743, now seen corresponding path program 9 times [2022-03-18 00:41:54,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:54,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [998696424] [2022-03-18 00:41:54,981 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:41:54,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1100780743, now seen corresponding path program 10 times [2022-03-18 00:41:54,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:54,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400838796] [2022-03-18 00:41:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:54,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:55,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:55,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:55,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400838796] [2022-03-18 00:41:55,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400838796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:41:55,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206250800] [2022-03-18 00:41:55,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:41:55,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:55,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:55,398 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) [2022-03-18 00:41:55,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 00:41:55,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:41:55,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:41:55,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 00:41:55,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:41:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:55,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:41:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:56,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206250800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:41:56,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:41:56,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 40 [2022-03-18 00:41:56,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [998696424] [2022-03-18 00:41:56,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [998696424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:56,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:56,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 00:41:56,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670042390] [2022-03-18 00:41:56,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:56,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 00:41:56,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:56,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 00:41:56,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:41:56,529 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) [2022-03-18 00:41:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:57,273 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-03-18 00:41:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 00:41:57,273 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 [2022-03-18 00:41:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:57,274 INFO L225 Difference]: With dead ends: 85 [2022-03-18 00:41:57,274 INFO L226 Difference]: Without dead ends: 82 [2022-03-18 00:41:57,275 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=602, Invalid=2050, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:41:57,276 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-03-18 00:41:57,276 INFO L913 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] [2022-03-18 00:41:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-18 00:41:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2022-03-18 00:41:57,289 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) [2022-03-18 00:41:57,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-03-18 00:41:57,290 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 73 [2022-03-18 00:41:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:57,290 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-03-18 00:41:57,290 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) [2022-03-18 00:41:57,290 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-03-18 00:41:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-18 00:41:57,291 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:57,291 INFO L500 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] [2022-03-18 00:41:57,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 00:41:57,504 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 [2022-03-18 00:41:57,504 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:57,504 INFO L85 PathProgramCache]: Analyzing trace with hash -812401958, now seen corresponding path program 11 times [2022-03-18 00:41:57,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:57,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963844029] [2022-03-18 00:41:57,505 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:41:57,505 INFO L85 PathProgramCache]: Analyzing trace with hash -812401958, now seen corresponding path program 12 times [2022-03-18 00:41:57,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:57,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331299907] [2022-03-18 00:41:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:57,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:57,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:57,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:57,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331299907] [2022-03-18 00:41:57,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331299907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:41:57,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4478208] [2022-03-18 00:41:57,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:41:57,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:57,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:57,928 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) [2022-03-18 00:41:57,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 00:41:59,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:41:59,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:41:59,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 114 conjunts are in the unsatisfiable core [2022-03-18 00:41:59,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:42:09,436 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:42:09,437 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 [2022-03-18 00:42:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-18 00:42:57,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-03-18 00:43:00,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4478208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:43:00,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:43:00,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 15] total 51 [2022-03-18 00:43:00,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:00,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963844029] [2022-03-18 00:43:00,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963844029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:00,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:00,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 00:43:00,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205479857] [2022-03-18 00:43:00,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:00,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 00:43:00,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:00,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 00:43:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2181, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 00:43:00,290 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) [2022-03-18 00:43:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:01,250 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-03-18 00:43:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 00:43:01,251 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 [2022-03-18 00:43:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:01,252 INFO L225 Difference]: With dead ends: 90 [2022-03-18 00:43:01,252 INFO L226 Difference]: Without dead ends: 87 [2022-03-18 00:43:01,253 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=484, Invalid=3548, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 00:43:01,254 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-03-18 00:43:01,254 INFO L913 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] [2022-03-18 00:43:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-18 00:43:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2022-03-18 00:43:01,264 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) [2022-03-18 00:43:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-03-18 00:43:01,264 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 78 [2022-03-18 00:43:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:01,265 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-03-18 00:43:01,265 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) [2022-03-18 00:43:01,265 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-03-18 00:43:01,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 00:43:01,266 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:01,266 INFO L500 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] [2022-03-18 00:43:01,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 00:43:01,480 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 [2022-03-18 00:43:01,481 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:01,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:01,481 INFO L85 PathProgramCache]: Analyzing trace with hash -570882087, now seen corresponding path program 13 times [2022-03-18 00:43:01,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:01,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1131184400] [2022-03-18 00:43:01,482 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:43:01,482 INFO L85 PathProgramCache]: Analyzing trace with hash -570882087, now seen corresponding path program 14 times [2022-03-18 00:43:01,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:43:01,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663197564] [2022-03-18 00:43:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:43:01,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:43:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:01,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:01,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:01,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663197564] [2022-03-18 00:43:01,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663197564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:01,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605164708] [2022-03-18 00:43:01,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:43:01,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:01,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:01,896 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) [2022-03-18 00:43:01,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 00:43:02,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:43:02,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:02,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 00:43:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:02,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:03,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605164708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:43:03,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:43:03,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 44 [2022-03-18 00:43:03,319 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:03,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1131184400] [2022-03-18 00:43:03,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1131184400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:03,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:03,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 00:43:03,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555517745] [2022-03-18 00:43:03,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:03,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 00:43:03,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:03,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 00:43:03,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:43:03,321 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) [2022-03-18 00:43:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:04,216 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-03-18 00:43:04,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 00:43:04,217 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 [2022-03-18 00:43:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:04,217 INFO L225 Difference]: With dead ends: 95 [2022-03-18 00:43:04,217 INFO L226 Difference]: Without dead ends: 92 [2022-03-18 00:43:04,218 INFO L911 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 [2022-03-18 00:43:04,219 INFO L912 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 [2022-03-18 00:43:04,219 INFO L913 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] [2022-03-18 00:43:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-18 00:43:04,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-03-18 00:43:04,229 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) [2022-03-18 00:43:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-03-18 00:43:04,230 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 83 [2022-03-18 00:43:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:04,230 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-03-18 00:43:04,231 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) [2022-03-18 00:43:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-03-18 00:43:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-18 00:43:04,232 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:04,232 INFO L500 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] [2022-03-18 00:43:04,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 00:43:04,443 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 [2022-03-18 00:43:04,444 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:04,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:04,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1780941370, now seen corresponding path program 15 times [2022-03-18 00:43:04,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:04,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [777486020] [2022-03-18 00:43:04,444 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:43:04,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1780941370, now seen corresponding path program 16 times [2022-03-18 00:43:04,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:43:04,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100369873] [2022-03-18 00:43:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:43:04,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:43:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:04,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:04,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:04,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:04,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100369873] [2022-03-18 00:43:04,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100369873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:04,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415556796] [2022-03-18 00:43:04,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:43:04,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:04,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:04,892 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) [2022-03-18 00:43:04,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 00:43:05,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:43:05,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:05,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 00:43:05,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:05,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:06,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415556796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:43:06,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:43:06,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 21] total 46 [2022-03-18 00:43:06,195 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:06,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [777486020] [2022-03-18 00:43:06,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [777486020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:06,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:06,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 00:43:06,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021762247] [2022-03-18 00:43:06,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:06,196 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 00:43:06,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 00:43:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1570, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:43:06,197 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) [2022-03-18 00:43:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:06,990 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-03-18 00:43:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 00:43:06,991 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 [2022-03-18 00:43:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:06,992 INFO L225 Difference]: With dead ends: 100 [2022-03-18 00:43:06,992 INFO L226 Difference]: Without dead ends: 97 [2022-03-18 00:43:06,993 INFO L911 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 [2022-03-18 00:43:06,993 INFO L912 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 [2022-03-18 00:43:06,993 INFO L913 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] [2022-03-18 00:43:06,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-18 00:43:07,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2022-03-18 00:43:07,005 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) [2022-03-18 00:43:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-03-18 00:43:07,005 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 88 [2022-03-18 00:43:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:07,006 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-03-18 00:43:07,006 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) [2022-03-18 00:43:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-03-18 00:43:07,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 00:43:07,007 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:07,007 INFO L500 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] [2022-03-18 00:43:07,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 00:43:07,219 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 [2022-03-18 00:43:07,220 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:07,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:07,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1289003911, now seen corresponding path program 17 times [2022-03-18 00:43:07,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:07,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1490875909] [2022-03-18 00:43:07,221 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:43:07,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1289003911, now seen corresponding path program 18 times [2022-03-18 00:43:07,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:43:07,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096864373] [2022-03-18 00:43:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:43:07,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:43:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:07,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:07,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:07,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096864373] [2022-03-18 00:43:07,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096864373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:07,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372292738] [2022-03-18 00:43:07,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:43:07,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:07,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:07,715 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) [2022-03-18 00:43:07,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 00:43:14,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:43:14,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:14,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 178 conjunts are in the unsatisfiable core [2022-03-18 00:43:14,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:35,733 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:43:35,734 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 [2022-03-18 00:45:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-18 00:45:03,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-18 00:45:10,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372292738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:10,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:10,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 73 [2022-03-18 00:45:10,282 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:10,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1490875909] [2022-03-18 00:45:10,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1490875909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:10,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:10,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 00:45:10,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926425625] [2022-03-18 00:45:10,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:10,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 00:45:10,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:10,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 00:45:10,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=760, Invalid=4496, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 00:45:10,285 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) [2022-03-18 00:45:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:11,688 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2022-03-18 00:45:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 00:45:11,688 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 [2022-03-18 00:45:11,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:11,689 INFO L225 Difference]: With dead ends: 105 [2022-03-18 00:45:11,689 INFO L226 Difference]: Without dead ends: 102 [2022-03-18 00:45:11,690 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=903, Invalid=6929, Unknown=0, NotChecked=0, Total=7832 [2022-03-18 00:45:11,691 INFO L912 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 [2022-03-18 00:45:11,691 INFO L913 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] [2022-03-18 00:45:11,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-18 00:45:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2022-03-18 00:45:11,700 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) [2022-03-18 00:45:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-03-18 00:45:11,701 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 93 [2022-03-18 00:45:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:11,701 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-03-18 00:45:11,701 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) [2022-03-18 00:45:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-03-18 00:45:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-18 00:45:11,702 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:11,702 INFO L500 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] [2022-03-18 00:45:11,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 00:45:11,904 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 [2022-03-18 00:45:11,904 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1817219482, now seen corresponding path program 19 times [2022-03-18 00:45:11,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:11,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [835615498] [2022-03-18 00:45:11,905 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:45:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1817219482, now seen corresponding path program 20 times [2022-03-18 00:45:11,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:11,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004726100] [2022-03-18 00:45:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:11,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:12,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:12,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:12,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004726100] [2022-03-18 00:45:12,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004726100] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:12,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567023539] [2022-03-18 00:45:12,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:45:12,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:12,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:12,430 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) [2022-03-18 00:45:12,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 00:45:12,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:45:12,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:12,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 00:45:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:13,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:14,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567023539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:14,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:14,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 50 [2022-03-18 00:45:14,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:14,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [835615498] [2022-03-18 00:45:14,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [835615498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:14,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:14,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 00:45:14,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028718998] [2022-03-18 00:45:14,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:14,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 00:45:14,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:14,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 00:45:14,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=1858, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 00:45:14,090 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) [2022-03-18 00:45:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:15,155 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-03-18 00:45:15,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 00:45:15,156 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 [2022-03-18 00:45:15,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:15,156 INFO L225 Difference]: With dead ends: 110 [2022-03-18 00:45:15,156 INFO L226 Difference]: Without dead ends: 107 [2022-03-18 00:45:15,158 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=997, Invalid=3425, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 00:45:15,158 INFO L912 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 [2022-03-18 00:45:15,158 INFO L913 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] [2022-03-18 00:45:15,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-18 00:45:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2022-03-18 00:45:15,169 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) [2022-03-18 00:45:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-03-18 00:45:15,170 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 98 [2022-03-18 00:45:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:15,170 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-03-18 00:45:15,170 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) [2022-03-18 00:45:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-03-18 00:45:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 00:45:15,171 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:15,171 INFO L500 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] [2022-03-18 00:45:15,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:15,372 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 [2022-03-18 00:45:15,372 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:15,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1265920281, now seen corresponding path program 21 times [2022-03-18 00:45:15,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:15,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [464780862] [2022-03-18 00:45:15,373 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:45:15,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1265920281, now seen corresponding path program 22 times [2022-03-18 00:45:15,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:15,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299272322] [2022-03-18 00:45:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:15,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:15,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:15,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:15,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299272322] [2022-03-18 00:45:15,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299272322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:15,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874302122] [2022-03-18 00:45:15,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:45:15,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:15,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:15,932 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) [2022-03-18 00:45:15,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 00:45:16,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:45:16,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:16,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 00:45:16,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:16,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:17,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874302122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:17,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:17,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 52 [2022-03-18 00:45:17,577 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:17,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [464780862] [2022-03-18 00:45:17,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [464780862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:17,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:17,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 00:45:17,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256102484] [2022-03-18 00:45:17,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:17,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 00:45:17,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:17,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 00:45:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=2011, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:45:17,579 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) [2022-03-18 00:45:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:18,709 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2022-03-18 00:45:18,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 00:45:18,709 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 [2022-03-18 00:45:18,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:18,710 INFO L225 Difference]: With dead ends: 115 [2022-03-18 00:45:18,710 INFO L226 Difference]: Without dead ends: 112 [2022-03-18 00:45:18,712 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 00:45:18,712 INFO L912 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 [2022-03-18 00:45:18,713 INFO L913 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] [2022-03-18 00:45:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-18 00:45:18,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-18 00:45:18,724 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) [2022-03-18 00:45:18,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-03-18 00:45:18,725 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 103 [2022-03-18 00:45:18,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:18,725 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-03-18 00:45:18,725 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) [2022-03-18 00:45:18,725 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-03-18 00:45:18,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-18 00:45:18,726 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:18,726 INFO L500 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] [2022-03-18 00:45:18,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:18,952 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 [2022-03-18 00:45:18,952 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash 618031354, now seen corresponding path program 23 times [2022-03-18 00:45:18,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:18,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1933923483] [2022-03-18 00:45:18,953 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:45:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash 618031354, now seen corresponding path program 24 times [2022-03-18 00:45:18,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:18,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265102342] [2022-03-18 00:45:18,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:18,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:19,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:19,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:19,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265102342] [2022-03-18 00:45:19,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265102342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:19,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557507447] [2022-03-18 00:45:19,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:45:19,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:19,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:19,504 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) [2022-03-18 00:45:19,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 00:45:22,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:45:22,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:22,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 00:45:22,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:23,081 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:45:23,081 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 [2022-03-18 00:45:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-03-18 00:45:23,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-03-18 00:45:25,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557507447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:25,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:25,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 9, 9] total 44 [2022-03-18 00:45:25,273 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:25,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1933923483] [2022-03-18 00:45:25,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1933923483] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:25,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:25,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 00:45:25,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067974155] [2022-03-18 00:45:25,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:25,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 00:45:25,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:25,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 00:45:25,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:45:25,275 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) [2022-03-18 00:45:26,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:26,506 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-03-18 00:45:26,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 00:45:26,506 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 [2022-03-18 00:45:26,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:26,507 INFO L225 Difference]: With dead ends: 120 [2022-03-18 00:45:26,507 INFO L226 Difference]: Without dead ends: 117 [2022-03-18 00:45:26,508 INFO L911 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 [2022-03-18 00:45:26,508 INFO L912 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 [2022-03-18 00:45:26,509 INFO L913 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] [2022-03-18 00:45:26,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-18 00:45:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-03-18 00:45:26,520 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) [2022-03-18 00:45:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-03-18 00:45:26,520 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 108 [2022-03-18 00:45:26,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:26,521 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-03-18 00:45:26,521 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) [2022-03-18 00:45:26,521 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-03-18 00:45:26,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 00:45:26,522 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:26,522 INFO L500 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] [2022-03-18 00:45:26,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:26,735 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 [2022-03-18 00:45:26,735 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1546768967, now seen corresponding path program 25 times [2022-03-18 00:45:26,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:26,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [610713380] [2022-03-18 00:45:26,736 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:45:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1546768967, now seen corresponding path program 26 times [2022-03-18 00:45:26,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:26,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332443382] [2022-03-18 00:45:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:26,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:27,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:27,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:27,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332443382] [2022-03-18 00:45:27,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332443382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:27,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097785361] [2022-03-18 00:45:27,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:45:27,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:27,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:27,361 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) [2022-03-18 00:45:27,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 00:45:27,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:45:27,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 00:45:27,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:28,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:29,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097785361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:29,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:29,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 56 [2022-03-18 00:45:29,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [610713380] [2022-03-18 00:45:29,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [610713380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:29,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:29,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 00:45:29,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758862984] [2022-03-18 00:45:29,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:29,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 00:45:29,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:29,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 00:45:29,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=2341, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 00:45:29,120 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) [2022-03-18 00:45:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:30,414 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2022-03-18 00:45:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 00:45:30,415 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 [2022-03-18 00:45:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:30,415 INFO L225 Difference]: With dead ends: 125 [2022-03-18 00:45:30,415 INFO L226 Difference]: Without dead ends: 122 [2022-03-18 00:45:30,416 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1270, Invalid=4430, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 00:45:30,417 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 75 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:30,417 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 775 Invalid, 2285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2241 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 00:45:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-18 00:45:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2022-03-18 00:45:30,429 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) [2022-03-18 00:45:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-03-18 00:45:30,429 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 113 [2022-03-18 00:45:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:30,430 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-03-18 00:45:30,430 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) [2022-03-18 00:45:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-03-18 00:45:30,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-18 00:45:30,430 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:30,431 INFO L500 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] [2022-03-18 00:45:30,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:30,631 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 [2022-03-18 00:45:30,631 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:30,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:30,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1560377254, now seen corresponding path program 27 times [2022-03-18 00:45:30,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:30,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [269390087] [2022-03-18 00:45:30,632 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:45:30,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1560377254, now seen corresponding path program 28 times [2022-03-18 00:45:30,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:30,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596069498] [2022-03-18 00:45:30,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:30,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:31,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:31,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:31,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596069498] [2022-03-18 00:45:31,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596069498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:31,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421337668] [2022-03-18 00:45:31,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:45:31,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:31,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:31,188 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) [2022-03-18 00:45:31,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 00:45:31,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:45:31,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:31,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 00:45:31,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:31,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:33,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421337668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:33,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:33,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27, 27] total 58 [2022-03-18 00:45:33,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:33,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [269390087] [2022-03-18 00:45:33,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [269390087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:33,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:33,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 00:45:33,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952412089] [2022-03-18 00:45:33,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:33,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 00:45:33,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 00:45:33,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2521, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 00:45:33,026 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) [2022-03-18 00:45:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:34,440 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-03-18 00:45:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 00:45:34,441 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 [2022-03-18 00:45:34,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:34,442 INFO L225 Difference]: With dead ends: 130 [2022-03-18 00:45:34,442 INFO L226 Difference]: Without dead ends: 127 [2022-03-18 00:45:34,443 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1355, Invalid=4807, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 00:45:34,443 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 75 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:34,443 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 838 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 00:45:34,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-18 00:45:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-03-18 00:45:34,456 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) [2022-03-18 00:45:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2022-03-18 00:45:34,457 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 118 [2022-03-18 00:45:34,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:34,457 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2022-03-18 00:45:34,457 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) [2022-03-18 00:45:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2022-03-18 00:45:34,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-18 00:45:34,458 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:34,458 INFO L500 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] [2022-03-18 00:45:34,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-18 00:45:34,659 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 [2022-03-18 00:45:34,659 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1219668569, now seen corresponding path program 29 times [2022-03-18 00:45:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:34,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1205445919] [2022-03-18 00:45:34,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:45:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1219668569, now seen corresponding path program 30 times [2022-03-18 00:45:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:34,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795294711] [2022-03-18 00:45:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:34,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:34,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:35,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:35,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:35,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795294711] [2022-03-18 00:45:35,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795294711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:35,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541394997] [2022-03-18 00:45:35,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:45:35,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:35,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:35,264 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) [2022-03-18 00:45:35,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 00:45:38,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:45:38,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:38,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-18 00:45:38,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:49,635 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:45:49,635 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 [2022-03-18 00:45:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 59 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2022-03-18 00:45:58,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2022-03-18 00:46:03,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541394997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:03,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:03,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 22, 20] total 71 [2022-03-18 00:46:03,325 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:03,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1205445919] [2022-03-18 00:46:03,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1205445919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:03,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:03,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 00:46:03,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383357316] [2022-03-18 00:46:03,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:03,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 00:46:03,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:03,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 00:46:03,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=4352, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 00:46:03,326 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) [2022-03-18 00:46:05,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:05,141 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2022-03-18 00:46:05,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 00:46:05,141 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 [2022-03-18 00:46:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:05,142 INFO L225 Difference]: With dead ends: 135 [2022-03-18 00:46:05,142 INFO L226 Difference]: Without dead ends: 132 [2022-03-18 00:46:05,143 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 206 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=815, Invalid=7741, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 00:46:05,144 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 76 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 2639 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:05,144 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 897 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2639 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 00:46:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-18 00:46:05,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2022-03-18 00:46:05,158 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) [2022-03-18 00:46:05,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2022-03-18 00:46:05,158 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 123 [2022-03-18 00:46:05,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:05,158 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2022-03-18 00:46:05,158 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) [2022-03-18 00:46:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2022-03-18 00:46:05,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-18 00:46:05,159 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:05,159 INFO L500 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] [2022-03-18 00:46:05,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:05,359 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 [2022-03-18 00:46:05,360 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:05,360 INFO L85 PathProgramCache]: Analyzing trace with hash 378466234, now seen corresponding path program 31 times [2022-03-18 00:46:05,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:05,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1027193452] [2022-03-18 00:46:05,361 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:46:05,361 INFO L85 PathProgramCache]: Analyzing trace with hash 378466234, now seen corresponding path program 32 times [2022-03-18 00:46:05,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:05,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320968825] [2022-03-18 00:46:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:05,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:05,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:05,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:05,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:05,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320968825] [2022-03-18 00:46:05,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320968825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:05,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035400644] [2022-03-18 00:46:05,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:46:05,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:05,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:05,985 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) [2022-03-18 00:46:05,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 00:46:06,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:46:06,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:06,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1455 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 00:46:06,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:06,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:08,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035400644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:08,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:08,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 29, 29] total 62 [2022-03-18 00:46:08,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:08,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1027193452] [2022-03-18 00:46:08,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1027193452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:08,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:08,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 00:46:08,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895257674] [2022-03-18 00:46:08,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:08,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 00:46:08,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:08,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 00:46:08,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=2911, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 00:46:08,213 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) [2022-03-18 00:46:09,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:09,843 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-03-18 00:46:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 00:46:09,843 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 [2022-03-18 00:46:09,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:09,844 INFO L225 Difference]: With dead ends: 140 [2022-03-18 00:46:09,844 INFO L226 Difference]: Without dead ends: 137 [2022-03-18 00:46:09,845 INFO L911 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 [2022-03-18 00:46:09,846 INFO L912 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, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:09,846 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 984 Invalid, 2996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2946 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 00:46:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-18 00:46:09,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-03-18 00:46:09,860 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) [2022-03-18 00:46:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2022-03-18 00:46:09,861 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 128 [2022-03-18 00:46:09,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:09,861 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2022-03-18 00:46:09,861 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) [2022-03-18 00:46:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2022-03-18 00:46:09,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-18 00:46:09,862 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:09,862 INFO L500 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] [2022-03-18 00:46:09,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-18 00:46:10,071 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 [2022-03-18 00:46:10,072 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash -165945607, now seen corresponding path program 33 times [2022-03-18 00:46:10,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:10,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2135756503] [2022-03-18 00:46:10,073 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:46:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash -165945607, now seen corresponding path program 34 times [2022-03-18 00:46:10,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:10,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951339389] [2022-03-18 00:46:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:10,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:10,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:10,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:10,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951339389] [2022-03-18 00:46:10,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951339389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:10,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550848556] [2022-03-18 00:46:10,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:46:10,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:10,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:10,763 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) [2022-03-18 00:46:10,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 00:46:11,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:46:11,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:11,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1493 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 00:46:11,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:11,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:12,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550848556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:12,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:12,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 30, 30] total 64 [2022-03-18 00:46:12,858 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:12,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2135756503] [2022-03-18 00:46:12,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2135756503] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:12,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:12,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 00:46:12,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081954487] [2022-03-18 00:46:12,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:12,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 00:46:12,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:12,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 00:46:12,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=3121, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 00:46:12,860 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) [2022-03-18 00:46:14,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:14,562 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2022-03-18 00:46:14,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 00:46:14,562 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 [2022-03-18 00:46:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:14,563 INFO L225 Difference]: With dead ends: 145 [2022-03-18 00:46:14,563 INFO L226 Difference]: Without dead ends: 142 [2022-03-18 00:46:14,564 INFO L911 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 [2022-03-18 00:46:14,565 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 81 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 3067 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:14,565 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1021 Invalid, 3119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 3067 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 00:46:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-18 00:46:14,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-03-18 00:46:14,578 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) [2022-03-18 00:46:14,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2022-03-18 00:46:14,578 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 133 [2022-03-18 00:46:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:14,578 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2022-03-18 00:46:14,579 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) [2022-03-18 00:46:14,579 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2022-03-18 00:46:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 00:46:14,579 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:14,579 INFO L500 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] [2022-03-18 00:46:14,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 00:46:14,780 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 [2022-03-18 00:46:14,780 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:14,781 INFO L85 PathProgramCache]: Analyzing trace with hash 802004762, now seen corresponding path program 35 times [2022-03-18 00:46:14,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:14,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1903663014] [2022-03-18 00:46:14,781 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:46:14,781 INFO L85 PathProgramCache]: Analyzing trace with hash 802004762, now seen corresponding path program 36 times [2022-03-18 00:46:14,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:14,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143488128] [2022-03-18 00:46:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:14,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:15,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:15,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:15,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143488128] [2022-03-18 00:46:15,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143488128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:15,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394067809] [2022-03-18 00:46:15,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:46:15,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:15,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:15,526 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) [2022-03-18 00:46:15,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 00:46:18,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:46:18,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 163 conjunts are in the unsatisfiable core [2022-03-18 00:46:18,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:52,854 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:46:52,855 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 [2022-03-18 00:48:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 51 proven. 71 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2022-03-18 00:48:21,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2022-03-18 00:48:26,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394067809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:26,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:26,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 23, 21] total 76 [2022-03-18 00:48:26,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:26,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1903663014] [2022-03-18 00:48:26,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1903663014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:26,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:26,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 00:48:26,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15920041] [2022-03-18 00:48:26,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:26,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 00:48:26,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:26,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 00:48:26,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=4998, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 00:48:26,668 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) [2022-03-18 00:48:28,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:28,814 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-03-18 00:48:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 00:48:28,819 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 [2022-03-18 00:48:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:28,820 INFO L225 Difference]: With dead ends: 150 [2022-03-18 00:48:28,820 INFO L226 Difference]: Without dead ends: 147 [2022-03-18 00:48:28,821 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=926, Invalid=9174, Unknown=0, NotChecked=0, Total=10100 [2022-03-18 00:48:28,822 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 84 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:28,822 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1083 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3292 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 00:48:28,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-18 00:48:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2022-03-18 00:48:28,838 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) [2022-03-18 00:48:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2022-03-18 00:48:28,839 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 138 [2022-03-18 00:48:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:28,839 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2022-03-18 00:48:28,839 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) [2022-03-18 00:48:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2022-03-18 00:48:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-18 00:48:28,840 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:28,840 INFO L500 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] [2022-03-18 00:48:28,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:29,051 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 [2022-03-18 00:48:29,051 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:29,051 INFO L85 PathProgramCache]: Analyzing trace with hash 931384217, now seen corresponding path program 37 times [2022-03-18 00:48:29,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:29,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [115422122] [2022-03-18 00:48:29,052 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:48:29,052 INFO L85 PathProgramCache]: Analyzing trace with hash 931384217, now seen corresponding path program 38 times [2022-03-18 00:48:29,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:29,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375450770] [2022-03-18 00:48:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:29,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:29,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:29,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:29,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375450770] [2022-03-18 00:48:29,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375450770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:29,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91217361] [2022-03-18 00:48:29,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:48:29,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:29,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:29,778 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) [2022-03-18 00:48:29,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 00:48:30,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:48:30,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:30,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1569 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 00:48:30,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:30,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:32,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91217361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:32,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:32,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 32, 32] total 68 [2022-03-18 00:48:32,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:32,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [115422122] [2022-03-18 00:48:32,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [115422122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:32,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:32,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 00:48:32,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927743497] [2022-03-18 00:48:32,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:32,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 00:48:32,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:32,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 00:48:32,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=985, Invalid=3571, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 00:48:32,090 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) [2022-03-18 00:48:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:34,032 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2022-03-18 00:48:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 00:48:34,032 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 [2022-03-18 00:48:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:34,033 INFO L225 Difference]: With dead ends: 155 [2022-03-18 00:48:34,033 INFO L226 Difference]: Without dead ends: 152 [2022-03-18 00:48:34,034 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1720, Invalid=7022, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 00:48:34,034 INFO L912 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 [2022-03-18 00:48:34,034 INFO L913 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] [2022-03-18 00:48:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-18 00:48:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2022-03-18 00:48:34,047 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) [2022-03-18 00:48:34,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2022-03-18 00:48:34,048 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 143 [2022-03-18 00:48:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:34,048 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2022-03-18 00:48:34,048 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) [2022-03-18 00:48:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2022-03-18 00:48:34,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-18 00:48:34,049 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:34,049 INFO L500 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] [2022-03-18 00:48:34,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-18 00:48:34,249 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 [2022-03-18 00:48:34,250 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:34,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:34,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2139133562, now seen corresponding path program 39 times [2022-03-18 00:48:34,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:34,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1530660927] [2022-03-18 00:48:34,251 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:48:34,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2139133562, now seen corresponding path program 40 times [2022-03-18 00:48:34,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:34,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138566967] [2022-03-18 00:48:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:34,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:35,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:35,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:35,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138566967] [2022-03-18 00:48:35,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138566967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:35,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156742714] [2022-03-18 00:48:35,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:48:35,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:35,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:35,042 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) [2022-03-18 00:48:35,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 00:48:35,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:48:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:35,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 00:48:35,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:48:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:35,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:48:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:37,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156742714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:48:37,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:48:37,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 33, 33] total 70 [2022-03-18 00:48:37,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:37,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1530660927] [2022-03-18 00:48:37,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1530660927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:37,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:37,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 00:48:37,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806237494] [2022-03-18 00:48:37,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:37,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 00:48:37,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:37,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 00:48:37,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1019, Invalid=3811, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 00:48:37,433 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) [2022-03-18 00:48:39,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:39,546 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2022-03-18 00:48:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 00:48:39,547 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 [2022-03-18 00:48:39,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:39,548 INFO L225 Difference]: With dead ends: 160 [2022-03-18 00:48:39,548 INFO L226 Difference]: Without dead ends: 157 [2022-03-18 00:48:39,549 INFO L911 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 [2022-03-18 00:48:39,549 INFO L912 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:39,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1222 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3769 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 00:48:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-18 00:48:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2022-03-18 00:48:39,565 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) [2022-03-18 00:48:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2022-03-18 00:48:39,565 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 148 [2022-03-18 00:48:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:39,565 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2022-03-18 00:48:39,565 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) [2022-03-18 00:48:39,566 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2022-03-18 00:48:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-18 00:48:39,566 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:39,566 INFO L500 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] [2022-03-18 00:48:39,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 00:48:39,772 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 [2022-03-18 00:48:39,772 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash 132411449, now seen corresponding path program 41 times [2022-03-18 00:48:39,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:39,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [918910887] [2022-03-18 00:48:39,773 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:48:39,774 INFO L85 PathProgramCache]: Analyzing trace with hash 132411449, now seen corresponding path program 42 times [2022-03-18 00:48:39,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:39,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492121649] [2022-03-18 00:48:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:39,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:40,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:40,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:40,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492121649] [2022-03-18 00:48:40,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492121649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:48:40,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845482936] [2022-03-18 00:48:40,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:48:40,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:48:40,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:48:40,600 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) [2022-03-18 00:48:40,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 00:48:48,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:48:48,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:48:49,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 126 conjunts are in the unsatisfiable core [2022-03-18 00:48:49,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:06,405 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:49:06,406 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 [2022-03-18 00:49:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 60 proven. 83 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2022-03-18 00:49:24,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2022-03-18 00:49:29,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845482936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:29,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:29,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 21, 20] total 76 [2022-03-18 00:49:29,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:29,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [918910887] [2022-03-18 00:49:29,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [918910887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:29,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:29,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 00:49:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040938430] [2022-03-18 00:49:29,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:29,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 00:49:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:29,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 00:49:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=5053, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 00:49:29,203 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) [2022-03-18 00:49:31,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:31,737 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2022-03-18 00:49:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 00:49:31,739 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 [2022-03-18 00:49:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:31,740 INFO L225 Difference]: With dead ends: 165 [2022-03-18 00:49:31,740 INFO L226 Difference]: Without dead ends: 162 [2022-03-18 00:49:31,741 INFO L911 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 [2022-03-18 00:49:31,741 INFO L912 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, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:31,741 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1259 Invalid, 3961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3901 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 00:49:31,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-18 00:49:31,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2022-03-18 00:49:31,754 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) [2022-03-18 00:49:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2022-03-18 00:49:31,755 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 153 [2022-03-18 00:49:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:31,755 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2022-03-18 00:49:31,755 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) [2022-03-18 00:49:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2022-03-18 00:49:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-18 00:49:31,756 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:31,756 INFO L500 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] [2022-03-18 00:49:31,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-18 00:49:31,959 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 [2022-03-18 00:49:31,959 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:31,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:31,960 INFO L85 PathProgramCache]: Analyzing trace with hash -689056294, now seen corresponding path program 43 times [2022-03-18 00:49:31,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:31,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [971020537] [2022-03-18 00:49:31,961 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:49:31,961 INFO L85 PathProgramCache]: Analyzing trace with hash -689056294, now seen corresponding path program 44 times [2022-03-18 00:49:31,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:31,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362850597] [2022-03-18 00:49:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:31,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:32,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:32,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:32,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362850597] [2022-03-18 00:49:32,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362850597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:32,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601316122] [2022-03-18 00:49:32,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:49:32,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:32,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:32,823 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) [2022-03-18 00:49:32,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 00:49:33,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:49:33,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:33,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 00:49:33,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:33,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:35,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601316122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:35,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:35,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 35, 35] total 74 [2022-03-18 00:49:35,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:35,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [971020537] [2022-03-18 00:49:35,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [971020537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:35,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:35,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 00:49:35,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594146119] [2022-03-18 00:49:35,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:35,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 00:49:35,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 00:49:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=4321, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 00:49:35,506 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) [2022-03-18 00:49:37,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:37,867 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2022-03-18 00:49:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 00:49:37,868 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 [2022-03-18 00:49:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:37,869 INFO L225 Difference]: With dead ends: 170 [2022-03-18 00:49:37,869 INFO L226 Difference]: Without dead ends: 167 [2022-03-18 00:49:37,869 INFO L911 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 [2022-03-18 00:49:37,870 INFO L912 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, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:37,870 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1392 Invalid, 4458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 4396 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 00:49:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-18 00:49:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2022-03-18 00:49:37,890 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) [2022-03-18 00:49:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2022-03-18 00:49:37,891 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 158 [2022-03-18 00:49:37,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:37,891 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2022-03-18 00:49:37,891 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) [2022-03-18 00:49:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2022-03-18 00:49:37,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-18 00:49:37,892 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:37,892 INFO L500 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] [2022-03-18 00:49:37,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 00:49:38,115 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 [2022-03-18 00:49:38,115 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:38,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1907870937, now seen corresponding path program 45 times [2022-03-18 00:49:38,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:38,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1611904501] [2022-03-18 00:49:38,117 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:49:38,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1907870937, now seen corresponding path program 46 times [2022-03-18 00:49:38,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:38,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662804635] [2022-03-18 00:49:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:38,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:38,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:38,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:38,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662804635] [2022-03-18 00:49:38,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662804635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:38,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773826428] [2022-03-18 00:49:38,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:49:38,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:38,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:38,949 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) [2022-03-18 00:49:38,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 00:49:39,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:49:39,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:39,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 00:49:39,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:40,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:41,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773826428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:41,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:41,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36, 36] total 76 [2022-03-18 00:49:41,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:41,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1611904501] [2022-03-18 00:49:41,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1611904501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:41,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:41,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 00:49:41,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144356402] [2022-03-18 00:49:41,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:41,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 00:49:41,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:41,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 00:49:41,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=4591, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 00:49:41,701 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) [2022-03-18 00:49:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:44,204 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2022-03-18 00:49:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 00:49:44,205 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 [2022-03-18 00:49:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:44,206 INFO L225 Difference]: With dead ends: 175 [2022-03-18 00:49:44,206 INFO L226 Difference]: Without dead ends: 172 [2022-03-18 00:49:44,207 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1940, Invalid=9190, Unknown=0, NotChecked=0, Total=11130 [2022-03-18 00:49:44,207 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 92 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 4543 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:44,207 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1441 Invalid, 4607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4543 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 00:49:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-18 00:49:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2022-03-18 00:49:44,221 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) [2022-03-18 00:49:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2022-03-18 00:49:44,222 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 163 [2022-03-18 00:49:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:44,222 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2022-03-18 00:49:44,223 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) [2022-03-18 00:49:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2022-03-18 00:49:44,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-18 00:49:44,223 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:44,223 INFO L500 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] [2022-03-18 00:49:44,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 00:49:44,437 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 [2022-03-18 00:49:44,437 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:44,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1478795974, now seen corresponding path program 47 times [2022-03-18 00:49:44,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:44,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1704902470] [2022-03-18 00:49:44,438 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:49:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1478795974, now seen corresponding path program 48 times [2022-03-18 00:49:44,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:44,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519826744] [2022-03-18 00:49:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:44,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:45,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:45,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:45,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519826744] [2022-03-18 00:49:45,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519826744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:45,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196686425] [2022-03-18 00:49:45,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:49:45,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:45,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:45,336 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) [2022-03-18 00:49:45,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 00:49:46,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:49:46,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:46,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 00:49:46,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:46,786 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:49:46,786 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 [2022-03-18 00:49:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 69 proven. 95 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2022-03-18 00:49:46,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2022-03-18 00:49:50,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196686425] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:50,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:50,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 9, 9] total 56 [2022-03-18 00:49:50,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:50,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1704902470] [2022-03-18 00:49:50,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1704902470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:50,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:50,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 00:49:50,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606754420] [2022-03-18 00:49:50,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:50,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 00:49:50,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:50,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 00:49:50,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2777, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 00:49:50,054 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) [2022-03-18 00:49:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:52,795 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2022-03-18 00:49:52,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 00:49:52,795 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 [2022-03-18 00:49:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:52,799 INFO L225 Difference]: With dead ends: 180 [2022-03-18 00:49:52,799 INFO L226 Difference]: Without dead ends: 177 [2022-03-18 00:49:52,799 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=578, Invalid=6904, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 00:49:52,800 INFO L912 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, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:52,800 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1515 Invalid, 4882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 4816 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 00:49:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-18 00:49:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-03-18 00:49:52,823 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) [2022-03-18 00:49:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2022-03-18 00:49:52,824 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 168 [2022-03-18 00:49:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:52,824 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2022-03-18 00:49:52,824 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) [2022-03-18 00:49:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2022-03-18 00:49:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-18 00:49:52,825 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:52,825 INFO L500 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] [2022-03-18 00:49:52,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 00:49:53,047 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 [2022-03-18 00:49:53,047 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:53,048 INFO L85 PathProgramCache]: Analyzing trace with hash 787997049, now seen corresponding path program 49 times [2022-03-18 00:49:53,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:53,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1467068608] [2022-03-18 00:49:53,049 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:49:53,049 INFO L85 PathProgramCache]: Analyzing trace with hash 787997049, now seen corresponding path program 50 times [2022-03-18 00:49:53,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:53,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025327925] [2022-03-18 00:49:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:53,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:53,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:53,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:53,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025327925] [2022-03-18 00:49:53,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025327925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:49:53,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420645739] [2022-03-18 00:49:53,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:49:53,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:49:53,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:49:53,955 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) [2022-03-18 00:49:53,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 00:49:54,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:49:54,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:49:54,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 00:49:54,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:49:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:55,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:49:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:56,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420645739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:49:56,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:49:56,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 38, 38] total 80 [2022-03-18 00:49:56,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:56,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1467068608] [2022-03-18 00:49:56,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1467068608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:56,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:56,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 00:49:56,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428085350] [2022-03-18 00:49:56,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:56,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 00:49:56,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:56,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 00:49:56,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1158, Invalid=5162, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 00:49:56,929 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) [2022-03-18 00:49:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:59,610 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2022-03-18 00:49:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 00:49:59,611 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 [2022-03-18 00:49:59,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:59,612 INFO L225 Difference]: With dead ends: 185 [2022-03-18 00:49:59,612 INFO L226 Difference]: Without dead ends: 182 [2022-03-18 00:49:59,613 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2026, Invalid=10406, Unknown=0, NotChecked=0, Total=12432 [2022-03-18 00:49:59,613 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 99 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 4831 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:59,615 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1521 Invalid, 4899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 4831 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 00:49:59,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-18 00:49:59,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2022-03-18 00:49:59,633 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) [2022-03-18 00:49:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2022-03-18 00:49:59,634 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 173 [2022-03-18 00:49:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:59,634 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2022-03-18 00:49:59,634 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) [2022-03-18 00:49:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2022-03-18 00:49:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-03-18 00:49:59,635 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:59,635 INFO L500 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] [2022-03-18 00:49:59,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 00:49:59,850 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 [2022-03-18 00:49:59,851 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:59,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1687104666, now seen corresponding path program 51 times [2022-03-18 00:49:59,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:59,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1162899659] [2022-03-18 00:49:59,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:49:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1687104666, now seen corresponding path program 52 times [2022-03-18 00:49:59,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:59,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007858745] [2022-03-18 00:49:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:59,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:00,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:00,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:00,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007858745] [2022-03-18 00:50:00,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007858745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:00,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701043635] [2022-03-18 00:50:00,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:50:00,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:00,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:00,788 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) [2022-03-18 00:50:00,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 00:50:01,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:50:01,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:01,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 00:50:01,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:01,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:50:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:03,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701043635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:50:03,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:50:03,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 39, 39] total 82 [2022-03-18 00:50:03,827 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:03,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1162899659] [2022-03-18 00:50:03,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1162899659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:03,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:03,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-18 00:50:03,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693955988] [2022-03-18 00:50:03,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:03,828 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 00:50:03,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:03,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 00:50:03,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=5463, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 00:50:03,829 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) [2022-03-18 00:50:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:06,735 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2022-03-18 00:50:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 00:50:06,735 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 [2022-03-18 00:50:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:06,736 INFO L225 Difference]: With dead ends: 190 [2022-03-18 00:50:06,736 INFO L226 Difference]: Without dead ends: 187 [2022-03-18 00:50:06,737 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2063, Invalid=11047, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 00:50:06,737 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 98 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 5389 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:06,737 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1678 Invalid, 5459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 5389 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 00:50:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-18 00:50:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-03-18 00:50:06,755 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) [2022-03-18 00:50:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2022-03-18 00:50:06,756 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 178 [2022-03-18 00:50:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:06,756 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2022-03-18 00:50:06,756 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) [2022-03-18 00:50:06,756 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2022-03-18 00:50:06,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-18 00:50:06,757 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:06,757 INFO L500 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] [2022-03-18 00:50:06,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 00:50:06,983 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 [2022-03-18 00:50:06,983 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:06,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1226747417, now seen corresponding path program 53 times [2022-03-18 00:50:06,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:06,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1515619999] [2022-03-18 00:50:06,985 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:50:06,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1226747417, now seen corresponding path program 54 times [2022-03-18 00:50:06,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:06,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123814444] [2022-03-18 00:50:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:06,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:07,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:07,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:07,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123814444] [2022-03-18 00:50:07,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123814444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:07,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771008498] [2022-03-18 00:50:07,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:50:07,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:07,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:07,974 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) [2022-03-18 00:50:07,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 00:50:11,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:50:11,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:11,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-18 00:50:11,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:16,051 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:50:16,052 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 [2022-03-18 00:50:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 78 proven. 107 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2022-03-18 00:50:16,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:50:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2022-03-18 00:50:21,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771008498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:50:21,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:50:21,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 22, 20] total 83 [2022-03-18 00:50:21,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:21,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1515619999] [2022-03-18 00:50:21,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1515619999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:21,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:21,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 00:50:21,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285926463] [2022-03-18 00:50:21,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:21,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 00:50:21,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:21,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 00:50:21,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=715, Invalid=6091, Unknown=0, NotChecked=0, Total=6806 [2022-03-18 00:50:21,952 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) [2022-03-18 00:50:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:25,379 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2022-03-18 00:50:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 00:50:25,380 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 [2022-03-18 00:50:25,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:25,381 INFO L225 Difference]: With dead ends: 195 [2022-03-18 00:50:25,381 INFO L226 Difference]: Without dead ends: 192 [2022-03-18 00:50:25,382 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 326 SyntacticMatches, 4 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1031, Invalid=12541, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 00:50:25,382 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 99 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 5829 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:25,383 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 1801 Invalid, 5901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 5829 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 00:50:25,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-18 00:50:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2022-03-18 00:50:25,408 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) [2022-03-18 00:50:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2022-03-18 00:50:25,409 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 183 [2022-03-18 00:50:25,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:25,409 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2022-03-18 00:50:25,409 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) [2022-03-18 00:50:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2022-03-18 00:50:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-03-18 00:50:25,410 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:25,410 INFO L500 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] [2022-03-18 00:50:25,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 00:50:25,623 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 [2022-03-18 00:50:25,623 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash -540064774, now seen corresponding path program 55 times [2022-03-18 00:50:25,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:25,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1671639507] [2022-03-18 00:50:25,625 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:50:25,625 INFO L85 PathProgramCache]: Analyzing trace with hash -540064774, now seen corresponding path program 56 times [2022-03-18 00:50:25,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:25,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726050787] [2022-03-18 00:50:25,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:25,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:26,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:26,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:26,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726050787] [2022-03-18 00:50:26,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726050787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:26,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039817207] [2022-03-18 00:50:26,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:50:26,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:26,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:26,582 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) [2022-03-18 00:50:26,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 00:50:27,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:50:27,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:27,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1911 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 00:50:27,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:27,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:50:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 1974 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:30,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039817207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:50:30,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:50:30,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 41, 41] total 86 [2022-03-18 00:50:30,063 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:30,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1671639507] [2022-03-18 00:50:30,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1671639507] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:30,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:30,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-18 00:50:30,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289201953] [2022-03-18 00:50:30,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:30,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 00:50:30,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:30,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 00:50:30,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=6096, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 00:50:30,065 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) [2022-03-18 00:50:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:33,364 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2022-03-18 00:50:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 00:50:33,364 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 [2022-03-18 00:50:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:33,365 INFO L225 Difference]: With dead ends: 200 [2022-03-18 00:50:33,365 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 00:50:33,367 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2125, Invalid=12395, Unknown=0, NotChecked=0, Total=14520 [2022-03-18 00:50:33,367 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 101 mSDsluCounter, 1839 mSDsCounter, 0 mSdLazyCounter, 6139 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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 [2022-03-18 00:50:33,367 INFO L913 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] [2022-03-18 00:50:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 00:50:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-03-18 00:50:33,394 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) [2022-03-18 00:50:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2022-03-18 00:50:33,395 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 188 [2022-03-18 00:50:33,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:33,395 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2022-03-18 00:50:33,395 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) [2022-03-18 00:50:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2022-03-18 00:50:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-18 00:50:33,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:33,396 INFO L500 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] [2022-03-18 00:50:33,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 00:50:33,611 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 [2022-03-18 00:50:33,611 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:33,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1188678983, now seen corresponding path program 57 times [2022-03-18 00:50:33,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:33,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [507549694] [2022-03-18 00:50:33,613 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:50:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1188678983, now seen corresponding path program 58 times [2022-03-18 00:50:33,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:33,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715429541] [2022-03-18 00:50:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:33,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:34,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:34,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:34,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715429541] [2022-03-18 00:50:34,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715429541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:34,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641820781] [2022-03-18 00:50:34,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:50:34,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:34,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:34,638 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) [2022-03-18 00:50:34,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 00:50:35,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:50:35,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:35,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1949 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-18 00:50:35,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:35,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:50:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:38,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641820781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:50:38,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:50:38,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 42, 42] total 88 [2022-03-18 00:50:38,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:38,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [507549694] [2022-03-18 00:50:38,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [507549694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:38,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:38,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 00:50:38,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4451216] [2022-03-18 00:50:38,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:38,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 00:50:38,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:38,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 00:50:38,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=6428, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 00:50:38,101 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) [2022-03-18 00:50:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:41,487 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2022-03-18 00:50:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 00:50:41,487 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 [2022-03-18 00:50:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:41,488 INFO L225 Difference]: With dead ends: 205 [2022-03-18 00:50:41,488 INFO L226 Difference]: Without dead ends: 202 [2022-03-18 00:50:41,489 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2150, Invalid=13102, Unknown=0, NotChecked=0, Total=15252 [2022-03-18 00:50:41,489 INFO L912 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, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:41,489 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1888 Invalid, 6232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 6156 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 00:50:41,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-03-18 00:50:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2022-03-18 00:50:41,518 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) [2022-03-18 00:50:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2022-03-18 00:50:41,519 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 193 [2022-03-18 00:50:41,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:41,519 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2022-03-18 00:50:41,520 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) [2022-03-18 00:50:41,520 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2022-03-18 00:50:41,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-18 00:50:41,520 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:41,521 INFO L500 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] [2022-03-18 00:50:41,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-18 00:50:41,735 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 [2022-03-18 00:50:41,735 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1394498726, now seen corresponding path program 59 times [2022-03-18 00:50:41,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:41,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2116574915] [2022-03-18 00:50:41,737 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:50:41,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1394498726, now seen corresponding path program 60 times [2022-03-18 00:50:41,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:41,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757740664] [2022-03-18 00:50:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:41,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:42,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 2265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:42,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:42,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757740664] [2022-03-18 00:50:42,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757740664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:50:42,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153416189] [2022-03-18 00:50:42,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:50:42,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:50:42,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:50:42,780 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) [2022-03-18 00:50:42,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 00:50:43,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:50:43,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:50:43,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 00:50:43,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:50:44,054 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:50:44,054 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