/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+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:39:20,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:39:20,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:39:20,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:39:20,339 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 00:39:20,346 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:39:20,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:39:20,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:39:20,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:39:20,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:39:20,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:39:20,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:39:20,348 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:39:20,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:39:20,349 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:39:20,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:39:20,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:39:20,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:39:20,349 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:39:20,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:39:20,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:39:20,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:39:20,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:39:20,350 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:39:20,350 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:39:20,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:39:20,350 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:39:20,351 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:39:20,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:39:20,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:39:20,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:39:20,591 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:39:20,592 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:39:20,593 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2022-03-18 00:39:20,644 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95f43792a/7928e3b9adac4f23895df7ee76729e56/FLAGb1a717da8 [2022-03-18 00:39:21,075 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:39:21,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2022-03-18 00:39:21,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95f43792a/7928e3b9adac4f23895df7ee76729e56/FLAGb1a717da8 [2022-03-18 00:39:21,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95f43792a/7928e3b9adac4f23895df7ee76729e56 [2022-03-18 00:39:21,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:39:21,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:39:21,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:39:21,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:39:21,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:39:21,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:39:21" (1/1) ... [2022-03-18 00:39:21,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73284a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:21, skipping insertion in model container [2022-03-18 00:39:21,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:39:21" (1/1) ... [2022-03-18 00:39:21,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:39:21,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:39:21,731 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+cfa-reducer.c[7920,7933] [2022-03-18 00:39:21,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:39:21,745 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:39:21,792 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+cfa-reducer.c[7920,7933] [2022-03-18 00:39:21,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:39:21,806 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:39:21,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:21 WrapperNode [2022-03-18 00:39:21,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:39:21,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:39:21,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:39:21,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:39:21,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:21" (1/1) ... [2022-03-18 00:39:21,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:21" (1/1) ... [2022-03-18 00:39:21,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:21" (1/1) ... [2022-03-18 00:39:21,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:21" (1/1) ... [2022-03-18 00:39:21,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:21" (1/1) ... [2022-03-18 00:39:21,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:21" (1/1) ... [2022-03-18 00:39:21,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:21" (1/1) ... [2022-03-18 00:39:21,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:39:21,885 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:39:21,885 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:39:21,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:39:21,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:21" (1/1) ... [2022-03-18 00:39:21,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:39:21,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:21,921 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 00:39:21,943 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 00:39:21,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:39:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:39:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:39:21,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:39:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:39:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:39:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:39:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:39:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-03-18 00:39:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-03-18 00:39:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:39:21,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:39:21,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 00:39:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:39:21,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-03-18 00:39:21,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:39:21,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:39:21,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:39:21,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:39:21,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-03-18 00:39:21,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:39:22,068 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:39:22,069 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:39:22,558 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:39:22,566 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:39:22,567 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-18 00:39:22,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:39:22 BoogieIcfgContainer [2022-03-18 00:39:22,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:39:22,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:39:22,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:39:22,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:39:22,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:39:21" (1/3) ... [2022-03-18 00:39:22,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7a7f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:39:22, skipping insertion in model container [2022-03-18 00:39:22,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:39:21" (2/3) ... [2022-03-18 00:39:22,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7a7f17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:39:22, skipping insertion in model container [2022-03-18 00:39:22,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:39:22" (3/3) ... [2022-03-18 00:39:22,579 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2022-03-18 00:39:22,584 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:39:22,584 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:39:22,625 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:39:22,630 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 00:39:22,631 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:39:22,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 00:39:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 00:39:22,654 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:22,655 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:22,658 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:22,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:22,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2001183330, now seen corresponding path program 1 times [2022-03-18 00:39:22,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:22,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1876259769] [2022-03-18 00:39:22,680 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:39:22,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2001183330, now seen corresponding path program 2 times [2022-03-18 00:39:22,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:22,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077520116] [2022-03-18 00:39:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:22,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:23,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:23,131 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 00:39:23,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:23,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077520116] [2022-03-18 00:39:23,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077520116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:23,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:23,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:39:23,158 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:23,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1876259769] [2022-03-18 00:39:23,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1876259769] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:23,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:23,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:39:23,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113517098] [2022-03-18 00:39:23,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:23,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:39:23,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:23,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:39:23,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:39:23,199 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 00:39:23,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:23,310 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-03-18 00:39:23,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:39:23,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2022-03-18 00:39:23,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:23,319 INFO L225 Difference]: With dead ends: 46 [2022-03-18 00:39:23,319 INFO L226 Difference]: Without dead ends: 24 [2022-03-18 00:39:23,322 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:39:23,325 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:23,327 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 41 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:39:23,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-18 00:39:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-03-18 00:39:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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 00:39:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-18 00:39:23,361 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-03-18 00:39:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:23,362 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-18 00:39:23,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 00:39:23,362 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-18 00:39:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 00:39:23,363 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:23,363 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:23,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:39:23,364 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:23,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:23,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2000766256, now seen corresponding path program 1 times [2022-03-18 00:39:23,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:23,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296494840] [2022-03-18 00:39:23,367 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:39:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2000766256, now seen corresponding path program 2 times [2022-03-18 00:39:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:23,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394235859] [2022-03-18 00:39:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:23,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:23,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:23,512 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 00:39:23,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:23,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394235859] [2022-03-18 00:39:23,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394235859] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:23,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:23,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:39:23,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:23,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296494840] [2022-03-18 00:39:23,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296494840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:23,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:23,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:39:23,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557774081] [2022-03-18 00:39:23,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:23,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:39:23,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:23,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:39:23,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:39:23,521 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 00:39:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:23,607 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-03-18 00:39:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:39:23,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2022-03-18 00:39:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:23,609 INFO L225 Difference]: With dead ends: 28 [2022-03-18 00:39:23,610 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 00:39:23,611 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 00:39:23,615 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:23,616 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:39:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 00:39:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2022-03-18 00:39:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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 00:39:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-18 00:39:23,623 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2022-03-18 00:39:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:23,624 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-18 00:39:23,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 00:39:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-18 00:39:23,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 00:39:23,625 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:23,625 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:23,625 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:39:23,625 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:23,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:23,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1978265494, now seen corresponding path program 1 times [2022-03-18 00:39:23,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:23,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2084986646] [2022-03-18 00:39:23,627 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:39:23,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1978265494, now seen corresponding path program 2 times [2022-03-18 00:39:23,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:23,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494865181] [2022-03-18 00:39:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:23,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:23,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:23,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:23,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494865181] [2022-03-18 00:39:23,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494865181] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:23,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848612066] [2022-03-18 00:39:23,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:39:23,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:23,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:23,803 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 00:39:23,804 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 00:39:24,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:39:24,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:24,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:39:24,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:24,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:24,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848612066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:24,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:24,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 00:39:24,259 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:24,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2084986646] [2022-03-18 00:39:24,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2084986646] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:24,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:24,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:39:24,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035642755] [2022-03-18 00:39:24,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:24,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:39:24,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:39:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:39:24,261 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 00:39:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:24,379 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-03-18 00:39:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:39:24,379 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 19 [2022-03-18 00:39:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:24,380 INFO L225 Difference]: With dead ends: 40 [2022-03-18 00:39:24,380 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 00:39:24,381 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:39:24,384 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:24,386 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 41 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:39:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 00:39:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-03-18 00:39:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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 00:39:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-03-18 00:39:24,394 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2022-03-18 00:39:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:24,395 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-03-18 00:39:24,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 00:39:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-03-18 00:39:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 00:39:24,396 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:24,396 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:24,423 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 00:39:24,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:24,620 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:24,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1594611826, now seen corresponding path program 3 times [2022-03-18 00:39:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:24,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1650291955] [2022-03-18 00:39:24,621 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:39:24,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1594611826, now seen corresponding path program 4 times [2022-03-18 00:39:24,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:24,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772345162] [2022-03-18 00:39:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:24,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:24,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:24,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:24,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772345162] [2022-03-18 00:39:24,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772345162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:24,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275227936] [2022-03-18 00:39:24,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:39:24,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:24,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:24,781 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 00:39:24,784 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 00:39:24,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:39:24,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:24,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 00:39:24,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:25,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:25,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275227936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:25,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:25,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-18 00:39:25,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:25,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1650291955] [2022-03-18 00:39:25,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1650291955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:25,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:25,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:39:25,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936846486] [2022-03-18 00:39:25,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:25,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:39:25,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:25,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:39:25,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:39:25,173 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 00:39:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:25,332 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-03-18 00:39:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:39:25,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 25 [2022-03-18 00:39:25,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:25,334 INFO L225 Difference]: With dead ends: 46 [2022-03-18 00:39:25,334 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 00:39:25,334 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:39:25,335 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:25,335 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 59 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:39:25,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 00:39:25,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-03-18 00:39:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 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 00:39:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-03-18 00:39:25,350 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2022-03-18 00:39:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:25,350 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-03-18 00:39:25,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 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 00:39:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-03-18 00:39:25,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 00:39:25,351 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:25,351 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:25,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 00:39:25,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 00:39:25,560 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:25,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:25,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1841134202, now seen corresponding path program 5 times [2022-03-18 00:39:25,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:25,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1155416599] [2022-03-18 00:39:25,561 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:39:25,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1841134202, now seen corresponding path program 6 times [2022-03-18 00:39:25,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:25,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673050698] [2022-03-18 00:39:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:25,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:25,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:25,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:25,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673050698] [2022-03-18 00:39:25,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673050698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:25,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779599325] [2022-03-18 00:39:25,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:39:25,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:25,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:25,679 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 00:39:25,705 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 00:39:26,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 00:39:26,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:26,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 00:39:26,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:26,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:26,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779599325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:26,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:26,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-18 00:39:26,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:26,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1155416599] [2022-03-18 00:39:26,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1155416599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:26,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:26,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:39:26,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888780728] [2022-03-18 00:39:26,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:26,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:39:26,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:26,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:39:26,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:39:26,356 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 00:39:26,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:26,557 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-03-18 00:39:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:39:26,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 31 [2022-03-18 00:39:26,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:26,559 INFO L225 Difference]: With dead ends: 52 [2022-03-18 00:39:26,559 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 00:39:26,559 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:39:26,560 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:26,560 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 81 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:39:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 00:39:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2022-03-18 00:39:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 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 00:39:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-03-18 00:39:26,570 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2022-03-18 00:39:26,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:26,570 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-03-18 00:39:26,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 00:39:26,570 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-03-18 00:39:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 00:39:26,571 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:26,571 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:26,602 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 00:39:26,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:26,802 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1281324674, now seen corresponding path program 7 times [2022-03-18 00:39:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:26,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1879870698] [2022-03-18 00:39:26,803 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:39:26,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1281324674, now seen corresponding path program 8 times [2022-03-18 00:39:26,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:26,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770982372] [2022-03-18 00:39:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:26,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:27,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:27,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770982372] [2022-03-18 00:39:27,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770982372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242656387] [2022-03-18 00:39:27,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:39:27,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:27,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:27,016 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 00:39:27,044 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 00:39:27,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:39:27,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:27,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 00:39:27,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:27,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:27,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242656387] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:27,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:27,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-18 00:39:27,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:27,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1879870698] [2022-03-18 00:39:27,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1879870698] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:27,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:27,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:39:27,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500439664] [2022-03-18 00:39:27,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:27,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:39:27,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:27,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:39:27,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:39:27,546 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 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 00:39:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:27,791 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-03-18 00:39:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:39:27,791 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 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 37 [2022-03-18 00:39:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:27,792 INFO L225 Difference]: With dead ends: 58 [2022-03-18 00:39:27,792 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 00:39:27,793 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:39:27,793 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:27,794 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 107 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:39:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 00:39:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-03-18 00:39:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 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 00:39:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-03-18 00:39:27,803 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2022-03-18 00:39:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:27,803 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-03-18 00:39:27,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 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 00:39:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-03-18 00:39:27,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 00:39:27,804 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:27,804 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:27,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 00:39:28,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:28,005 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:28,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash 935742602, now seen corresponding path program 9 times [2022-03-18 00:39:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:28,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [679676136] [2022-03-18 00:39:28,006 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:39:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash 935742602, now seen corresponding path program 10 times [2022-03-18 00:39:28,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:28,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101157947] [2022-03-18 00:39:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:28,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:28,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:28,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:28,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101157947] [2022-03-18 00:39:28,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101157947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:28,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194654410] [2022-03-18 00:39:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:39:28,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:28,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:28,160 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 00:39:28,162 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 00:39:28,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:39:28,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:28,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 00:39:28,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:28,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:28,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194654410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:28,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:28,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 00:39:28,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:28,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [679676136] [2022-03-18 00:39:28,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [679676136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:28,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:28,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:39:28,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586326227] [2022-03-18 00:39:28,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:28,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:39:28,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:28,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:39:28,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:39:28,727 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 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 00:39:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:29,017 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2022-03-18 00:39:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 00:39:29,018 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 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 43 [2022-03-18 00:39:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:29,019 INFO L225 Difference]: With dead ends: 64 [2022-03-18 00:39:29,019 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 00:39:29,020 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:39:29,021 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:29,021 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 137 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:39:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 00:39:29,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-03-18 00:39:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 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 00:39:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-03-18 00:39:29,047 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 43 [2022-03-18 00:39:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:29,047 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-03-18 00:39:29,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 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 00:39:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-03-18 00:39:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 00:39:29,050 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:29,050 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:29,078 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 00:39:29,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:29,264 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:29,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:29,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1687782254, now seen corresponding path program 11 times [2022-03-18 00:39:29,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:29,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [934772126] [2022-03-18 00:39:29,265 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:39:29,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1687782254, now seen corresponding path program 12 times [2022-03-18 00:39:29,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:29,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303254881] [2022-03-18 00:39:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:29,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:29,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 12 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:29,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303254881] [2022-03-18 00:39:29,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303254881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746017522] [2022-03-18 00:39:29,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:39:29,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:29,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:29,444 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 00:39:29,444 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 00:39:30,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:39:30,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:30,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-18 00:39:30,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:30,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 00:39:30,990 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:39:30,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 47 treesize of output 67 [2022-03-18 00:39:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 24 proven. 72 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 00:39:31,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 44 proven. 46 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-18 00:39:32,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746017522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:32,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:32,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 32 [2022-03-18 00:39:32,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:32,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [934772126] [2022-03-18 00:39:32,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [934772126] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:32,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:32,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:39:32,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351439476] [2022-03-18 00:39:32,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:32,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:39:32,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:32,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:39:32,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:39:32,917 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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 00:39:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:33,314 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-03-18 00:39:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:39:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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 49 [2022-03-18 00:39:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:33,315 INFO L225 Difference]: With dead ends: 70 [2022-03-18 00:39:33,315 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 00:39:33,316 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 00:39:33,317 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:33,317 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 171 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:39:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 00:39:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-03-18 00:39:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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 00:39:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-03-18 00:39:33,327 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 49 [2022-03-18 00:39:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:33,327 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-03-18 00:39:33,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 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 00:39:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-03-18 00:39:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 00:39:33,328 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:33,328 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:33,357 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 00:39:33,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:33,548 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1722513766, now seen corresponding path program 13 times [2022-03-18 00:39:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:33,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [667013922] [2022-03-18 00:39:33,549 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:39:33,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1722513766, now seen corresponding path program 14 times [2022-03-18 00:39:33,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:33,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079895295] [2022-03-18 00:39:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:33,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:33,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:33,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:33,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079895295] [2022-03-18 00:39:33,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079895295] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:33,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267170234] [2022-03-18 00:39:33,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:39:33,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:33,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:33,743 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 00:39:33,744 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 00:39:33,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:39:33,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:33,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 00:39:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:34,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:34,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267170234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:34,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:34,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-18 00:39:34,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:34,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [667013922] [2022-03-18 00:39:34,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [667013922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:34,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:34,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:39:34,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264039896] [2022-03-18 00:39:34,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:34,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:39:34,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:34,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:39:34,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:39:34,499 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 00:39:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:34,861 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2022-03-18 00:39:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 00:39:34,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 55 [2022-03-18 00:39:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:34,862 INFO L225 Difference]: With dead ends: 76 [2022-03-18 00:39:34,862 INFO L226 Difference]: Without dead ends: 66 [2022-03-18 00:39:34,863 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:39:34,864 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:34,864 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 209 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:39:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-18 00:39:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2022-03-18 00:39:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 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 00:39:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-03-18 00:39:34,874 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2022-03-18 00:39:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:34,875 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-03-18 00:39:34,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 00:39:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-03-18 00:39:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 00:39:34,876 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:34,876 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:34,905 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 00:39:35,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:35,097 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:35,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1840977246, now seen corresponding path program 15 times [2022-03-18 00:39:35,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:35,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [132255576] [2022-03-18 00:39:35,098 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:39:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1840977246, now seen corresponding path program 16 times [2022-03-18 00:39:35,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:35,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349388142] [2022-03-18 00:39:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:35,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:35,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 16 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:35,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:35,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349388142] [2022-03-18 00:39:35,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349388142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:35,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124017623] [2022-03-18 00:39:35,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:39:35,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:35,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:35,291 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 00:39:35,292 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 00:39:35,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:39:35,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:35,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 00:39:35,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 16 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:35,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 16 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:36,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124017623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:36,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:36,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-18 00:39:36,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:36,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [132255576] [2022-03-18 00:39:36,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [132255576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:36,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:36,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 00:39:36,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131318549] [2022-03-18 00:39:36,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:36,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 00:39:36,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:36,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 00:39:36,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-03-18 00:39:36,040 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 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 00:39:36,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:36,451 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2022-03-18 00:39:36,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:39:36,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 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 61 [2022-03-18 00:39:36,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:36,452 INFO L225 Difference]: With dead ends: 82 [2022-03-18 00:39:36,452 INFO L226 Difference]: Without dead ends: 72 [2022-03-18 00:39:36,453 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 00:39:36,453 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:36,454 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 251 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:39:36,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-18 00:39:36,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-03-18 00:39:36,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.03125) internal successors, (66), 64 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 00:39:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-03-18 00:39:36,465 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 61 [2022-03-18 00:39:36,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:36,466 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-03-18 00:39:36,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 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 00:39:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-03-18 00:39:36,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 00:39:36,467 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:36,467 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:36,493 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 00:39:36,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 00:39:36,686 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:36,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:36,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1383323478, now seen corresponding path program 17 times [2022-03-18 00:39:36,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:36,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [25815149] [2022-03-18 00:39:36,687 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:39:36,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1383323478, now seen corresponding path program 18 times [2022-03-18 00:39:36,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:36,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732693433] [2022-03-18 00:39:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:36,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:36,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 18 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:36,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:36,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732693433] [2022-03-18 00:39:36,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732693433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:36,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58065676] [2022-03-18 00:39:36,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:39:36,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:36,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:36,944 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 00:39:36,945 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 00:39:42,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:39:42,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:42,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 00:39:42,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:51,466 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:39:51,466 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 215 treesize of output 439 [2022-03-18 00:40:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-03-18 00:40:37,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:40:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 18 proven. 67 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-03-18 00:40:39,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58065676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:40:39,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:40:39,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 28 [2022-03-18 00:40:39,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:40:39,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [25815149] [2022-03-18 00:40:39,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [25815149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:40:39,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:40:39,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:40:39,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671896141] [2022-03-18 00:40:39,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:40:39,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:40:39,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:39,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:40:39,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:40:39,050 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 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 00:40:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:40:39,610 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-03-18 00:40:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 00:40:39,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 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 67 [2022-03-18 00:40:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:40:39,611 INFO L225 Difference]: With dead ends: 88 [2022-03-18 00:40:39,611 INFO L226 Difference]: Without dead ends: 78 [2022-03-18 00:40:39,612 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=240, Invalid=1320, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:40:39,612 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:40:39,612 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 297 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:40:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-18 00:40:39,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2022-03-18 00:40:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 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 00:40:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-03-18 00:40:39,621 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 67 [2022-03-18 00:40:39,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:40:39,621 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-03-18 00:40:39,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 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 00:40:39,621 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-03-18 00:40:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 00:40:39,622 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:40:39,622 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:40:39,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 00:40:39,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:39,824 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:40:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:40:39,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1629405362, now seen corresponding path program 19 times [2022-03-18 00:40:39,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:39,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [221327814] [2022-03-18 00:40:39,825 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:40:39,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1629405362, now seen corresponding path program 20 times [2022-03-18 00:40:39,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:40:39,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650094199] [2022-03-18 00:40:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:40:39,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:40:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:40,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:40:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:40,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:40:40,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650094199] [2022-03-18 00:40:40,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650094199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:40:40,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934887419] [2022-03-18 00:40:40,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:40:40,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:40,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:40:40,064 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 00:40:40,095 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 00:40:40,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:40:40,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:40:40,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 00:40:40,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:40:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:40,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:40:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 20 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:40,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934887419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:40:40,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:40:40,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-18 00:40:40,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:40:40,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [221327814] [2022-03-18 00:40:40,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [221327814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:40:40,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:40:40,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:40:40,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320291620] [2022-03-18 00:40:40,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:40:40,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 00:40:40,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 00:40:40,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:40:40,877 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 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 00:40:41,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:40:41,410 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2022-03-18 00:40:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:40:41,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 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 00:40:41,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:40:41,411 INFO L225 Difference]: With dead ends: 94 [2022-03-18 00:40:41,411 INFO L226 Difference]: Without dead ends: 84 [2022-03-18 00:40:41,412 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=1263, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 00:40:41,412 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:40:41,413 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 347 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:40:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-18 00:40:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-03-18 00:40:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 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 00:40:41,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-03-18 00:40:41,429 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 73 [2022-03-18 00:40:41,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:40:41,429 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-03-18 00:40:41,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 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 00:40:41,429 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-03-18 00:40:41,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 00:40:41,435 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:40:41,435 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:40:41,462 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 00:40:41,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 00:40:41,655 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:40:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:40:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash -107924806, now seen corresponding path program 21 times [2022-03-18 00:40:41,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:41,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1589001821] [2022-03-18 00:40:41,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:40:41,656 INFO L85 PathProgramCache]: Analyzing trace with hash -107924806, now seen corresponding path program 22 times [2022-03-18 00:40:41,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:40:41,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15630221] [2022-03-18 00:40:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:40:41,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:40:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:41,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:40:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 22 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:41,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:40:41,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15630221] [2022-03-18 00:40:41,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15630221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:40:41,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32945988] [2022-03-18 00:40:41,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:40:41,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:41,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:40:41,892 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 00:40:41,907 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 00:40:42,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:40:42,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:40:42,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 00:40:42,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:40:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 22 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:42,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:40:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 22 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:42,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32945988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:40:42,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:40:42,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-18 00:40:42,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:40:42,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1589001821] [2022-03-18 00:40:42,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1589001821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:40:42,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:40:42,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:40:42,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268277348] [2022-03-18 00:40:42,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:40:42,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:40:42,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:42,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:40:42,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2022-03-18 00:40:42,791 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 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 00:40:43,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:40:43,411 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2022-03-18 00:40:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 00:40:43,412 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 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 79 [2022-03-18 00:40:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:40:43,413 INFO L225 Difference]: With dead ends: 100 [2022-03-18 00:40:43,413 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 00:40:43,413 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=433, Invalid=1459, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:40:43,414 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 47 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:40:43,414 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 401 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:40:43,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 00:40:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-03-18 00:40:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 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 00:40:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-03-18 00:40:43,428 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 79 [2022-03-18 00:40:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:40:43,429 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-03-18 00:40:43,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 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 00:40:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-03-18 00:40:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 00:40:43,430 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:40:43,430 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:40:43,459 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 00:40:43,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 00:40:43,643 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:40:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:40:43,644 INFO L85 PathProgramCache]: Analyzing trace with hash 571997890, now seen corresponding path program 23 times [2022-03-18 00:40:43,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:43,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1917366957] [2022-03-18 00:40:43,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:40:43,644 INFO L85 PathProgramCache]: Analyzing trace with hash 571997890, now seen corresponding path program 24 times [2022-03-18 00:40:43,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:40:43,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120477865] [2022-03-18 00:40:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:40:43,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:40:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:43,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:40:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 24 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:43,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:40:43,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120477865] [2022-03-18 00:40:43,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120477865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:40:43,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58526495] [2022-03-18 00:40:43,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:40:43,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:43,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:40:43,924 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 00:40:43,953 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 00:40:46,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:40:46,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:40:46,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 00:40:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:40:46,715 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:40:46,715 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 19 treesize of output 19 [2022-03-18 00:40:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 68 proven. 47 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2022-03-18 00:40:46,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:40:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 24 proven. 91 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2022-03-18 00:40:48,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58526495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:40:48,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:40:48,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 8] total 31 [2022-03-18 00:40:48,559 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:40:48,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1917366957] [2022-03-18 00:40:48,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1917366957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:40:48,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:40:48,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 00:40:48,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421517592] [2022-03-18 00:40:48,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:40:48,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 00:40:48,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:48,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 00:40:48,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-03-18 00:40:48,561 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 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 00:40:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:40:49,212 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2022-03-18 00:40:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 00:40:49,213 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 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 85 [2022-03-18 00:40:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:40:49,213 INFO L225 Difference]: With dead ends: 106 [2022-03-18 00:40:49,213 INFO L226 Difference]: Without dead ends: 96 [2022-03-18 00:40:49,214 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:40:49,214 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:40:49,214 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 459 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:40:49,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-18 00:40:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-03-18 00:40:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 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 00:40:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-03-18 00:40:49,230 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 85 [2022-03-18 00:40:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:40:49,230 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-03-18 00:40:49,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 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 00:40:49,240 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-03-18 00:40:49,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 00:40:49,240 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:40:49,241 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:40:49,255 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 00:40:49,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 00:40:49,452 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:40:49,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:40:49,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1820828874, now seen corresponding path program 25 times [2022-03-18 00:40:49,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:49,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [804670084] [2022-03-18 00:40:49,454 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:40:49,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1820828874, now seen corresponding path program 26 times [2022-03-18 00:40:49,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:40:49,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526982803] [2022-03-18 00:40:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:40:49,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:40:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:49,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:40:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 26 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:49,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:40:49,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526982803] [2022-03-18 00:40:49,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526982803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:40:49,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070516981] [2022-03-18 00:40:49,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:40:49,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:49,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:40:49,733 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 00:40:49,734 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 00:40:50,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:40:50,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:40:50,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 00:40:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:40:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 26 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:50,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:40:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 26 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:50,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070516981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:40:50,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:40:50,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-18 00:40:50,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:40:50,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [804670084] [2022-03-18 00:40:50,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [804670084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:40:50,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:40:50,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:40:50,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882509922] [2022-03-18 00:40:50,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:40:50,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 00:40:50,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:50,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 00:40:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:40:50,853 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 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 00:40:51,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:40:51,536 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2022-03-18 00:40:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 00:40:51,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 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 91 [2022-03-18 00:40:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:40:51,538 INFO L225 Difference]: With dead ends: 112 [2022-03-18 00:40:51,538 INFO L226 Difference]: Without dead ends: 102 [2022-03-18 00:40:51,539 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=557, Invalid=1893, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 00:40:51,539 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 53 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:40:51,539 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 521 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:40:51,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-18 00:40:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-03-18 00:40:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 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 00:40:51,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-03-18 00:40:51,555 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 91 [2022-03-18 00:40:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:40:51,555 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-03-18 00:40:51,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 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 00:40:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-03-18 00:40:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 00:40:51,556 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:40:51,556 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:40:51,586 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 00:40:51,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 00:40:51,783 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:40:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:40:51,784 INFO L85 PathProgramCache]: Analyzing trace with hash -648764206, now seen corresponding path program 27 times [2022-03-18 00:40:51,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:51,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [534264407] [2022-03-18 00:40:51,784 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:40:51,784 INFO L85 PathProgramCache]: Analyzing trace with hash -648764206, now seen corresponding path program 28 times [2022-03-18 00:40:51,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:40:51,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174529640] [2022-03-18 00:40:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:40:51,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:40:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:52,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:40:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 28 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:52,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:40:52,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174529640] [2022-03-18 00:40:52,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174529640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:40:52,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115457649] [2022-03-18 00:40:52,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:40:52,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:52,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:40:52,068 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 00:40:52,068 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 00:40:52,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:40:52,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:40:52,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 00:40:52,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:40:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 28 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:52,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:40:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 28 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:53,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115457649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:40:53,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:40:53,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-18 00:40:53,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:40:53,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [534264407] [2022-03-18 00:40:53,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [534264407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:40:53,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:40:53,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 00:40:53,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100416184] [2022-03-18 00:40:53,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:40:53,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 00:40:53,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 00:40:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 00:40:53,240 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 18 states have internal predecessors, (94), 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 00:40:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:40:53,937 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2022-03-18 00:40:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 00:40:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 18 states have internal predecessors, (94), 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 97 [2022-03-18 00:40:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:40:53,938 INFO L225 Difference]: With dead ends: 118 [2022-03-18 00:40:53,938 INFO L226 Difference]: Without dead ends: 108 [2022-03-18 00:40:53,939 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=625, Invalid=2131, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 00:40:53,940 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 56 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:40:53,940 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 587 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:40:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-18 00:40:53,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2022-03-18 00:40:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 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 00:40:53,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-03-18 00:40:53,954 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 97 [2022-03-18 00:40:53,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:40:53,954 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-03-18 00:40:53,955 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 18 states have internal predecessors, (94), 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 00:40:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-03-18 00:40:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 00:40:53,955 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:40:53,956 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:40:53,984 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 00:40:54,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:54,171 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:40:54,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:40:54,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1603501786, now seen corresponding path program 29 times [2022-03-18 00:40:54,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:54,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [118115310] [2022-03-18 00:40:54,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:40:54,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1603501786, now seen corresponding path program 30 times [2022-03-18 00:40:54,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:40:54,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362088495] [2022-03-18 00:40:54,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:40:54,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:40:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:54,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:40:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 30 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:54,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:40:54,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362088495] [2022-03-18 00:40:54,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362088495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:40:54,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263932598] [2022-03-18 00:40:54,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:40:54,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:54,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:40:54,480 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 00:40:54,507 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 00:40:57,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:40:57,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:40:57,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 00:40:57,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:40:58,175 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:40:58,175 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 19 treesize of output 19 [2022-03-18 00:40:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 86 proven. 59 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-03-18 00:40:58,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:41:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 30 proven. 115 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-03-18 00:41:00,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263932598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:41:00,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:41:00,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 32 [2022-03-18 00:41:00,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:00,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [118115310] [2022-03-18 00:41:00,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [118115310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:00,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:00,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 00:41:00,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296924470] [2022-03-18 00:41:00,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:00,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 00:41:00,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:00,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 00:41:00,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:41:00,387 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 19 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 00:41:01,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:01,175 INFO L93 Difference]: Finished difference Result 124 states and 127 transitions. [2022-03-18 00:41:01,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 00:41:01,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 19 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 00:41:01,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:01,176 INFO L225 Difference]: With dead ends: 124 [2022-03-18 00:41:01,176 INFO L226 Difference]: Without dead ends: 114 [2022-03-18 00:41:01,177 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=2084, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 00:41:01,178 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 59 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:41:01,178 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 657 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:41:01,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-18 00:41:01,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2022-03-18 00:41:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 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 00:41:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-03-18 00:41:01,205 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 103 [2022-03-18 00:41:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:01,205 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-03-18 00:41:01,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 19 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 00:41:01,205 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-03-18 00:41:01,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 00:41:01,206 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:01,206 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:41:01,229 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 00:41:01,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 00:41:01,406 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:01,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1962455778, now seen corresponding path program 31 times [2022-03-18 00:41:01,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:01,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [779808243] [2022-03-18 00:41:01,407 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:41:01,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1962455778, now seen corresponding path program 32 times [2022-03-18 00:41:01,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:01,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319626108] [2022-03-18 00:41:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:01,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:01,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 32 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:01,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:01,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319626108] [2022-03-18 00:41:01,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319626108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:41:01,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937045572] [2022-03-18 00:41:01,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:41:01,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:01,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:01,739 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 00:41:01,750 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 00:41:02,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:41:02,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:41:02,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 00:41:02,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:41:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 32 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:02,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:41:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 32 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:03,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937045572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:41:03,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:41:03,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-18 00:41:03,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:03,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [779808243] [2022-03-18 00:41:03,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [779808243] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:03,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:03,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 00:41:03,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095763721] [2022-03-18 00:41:03,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:03,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 00:41:03,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:03,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 00:41:03,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:41:03,250 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 20 states have internal predecessors, (106), 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 00:41:04,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:04,138 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2022-03-18 00:41:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 00:41:04,138 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 20 states have internal predecessors, (106), 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 109 [2022-03-18 00:41:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:04,139 INFO L225 Difference]: With dead ends: 130 [2022-03-18 00:41:04,139 INFO L226 Difference]: Without dead ends: 120 [2022-03-18 00:41:04,140 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=773, Invalid=2649, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 00:41:04,141 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 62 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:41:04,141 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 731 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:41:04,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-18 00:41:04,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2022-03-18 00:41:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 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 00:41:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2022-03-18 00:41:04,171 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 109 [2022-03-18 00:41:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:04,172 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2022-03-18 00:41:04,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 20 states have internal predecessors, (106), 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 00:41:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2022-03-18 00:41:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 00:41:04,172 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:04,173 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:41:04,193 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 00:41:04,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 00:41:04,383 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:04,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1780956950, now seen corresponding path program 33 times [2022-03-18 00:41:04,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:04,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1816620668] [2022-03-18 00:41:04,384 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:41:04,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1780956950, now seen corresponding path program 34 times [2022-03-18 00:41:04,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:04,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398706309] [2022-03-18 00:41:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:04,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:04,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 34 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:04,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:04,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398706309] [2022-03-18 00:41:04,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398706309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:41:04,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869067786] [2022-03-18 00:41:04,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:41:04,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:04,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:04,732 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 00:41:04,762 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 00:41:05,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:41:05,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:41:05,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 00:41:05,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:41:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 34 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:05,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:41:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 34 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:06,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869067786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:41:06,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:41:06,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-18 00:41:06,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:06,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1816620668] [2022-03-18 00:41:06,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1816620668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:06,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:06,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 00:41:06,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435032319] [2022-03-18 00:41:06,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:06,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 00:41:06,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:06,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 00:41:06,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 00:41:06,226 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 21 states have internal predecessors, (112), 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 00:41:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:07,163 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2022-03-18 00:41:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 00:41:07,163 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 21 states have internal predecessors, (112), 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 115 [2022-03-18 00:41:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:07,164 INFO L225 Difference]: With dead ends: 136 [2022-03-18 00:41:07,164 INFO L226 Difference]: Without dead ends: 126 [2022-03-18 00:41:07,165 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=853, Invalid=2929, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 00:41:07,165 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 65 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:41:07,165 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 809 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:41:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-18 00:41:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2022-03-18 00:41:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 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 00:41:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2022-03-18 00:41:07,185 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 115 [2022-03-18 00:41:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:07,185 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2022-03-18 00:41:07,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 21 states have internal predecessors, (112), 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 00:41:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2022-03-18 00:41:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 00:41:07,186 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:07,186 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:41:07,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-18 00:41:07,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:07,387 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:07,387 INFO L85 PathProgramCache]: Analyzing trace with hash -853006094, now seen corresponding path program 35 times [2022-03-18 00:41:07,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:07,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1572792408] [2022-03-18 00:41:07,387 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:41:07,388 INFO L85 PathProgramCache]: Analyzing trace with hash -853006094, now seen corresponding path program 36 times [2022-03-18 00:41:07,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:07,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922792824] [2022-03-18 00:41:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:07,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:07,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 36 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:07,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:07,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922792824] [2022-03-18 00:41:07,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922792824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:41:07,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263582081] [2022-03-18 00:41:07,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:41:07,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:07,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:07,770 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 00:41:07,771 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 00:41:08,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:41:08,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:41:08,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 00:41:08,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:41:08,587 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-18 00:41:08,587 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