/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 00:46:43,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 00:46:43,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 00:46:43,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 00:46:43,609 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-10 00:46:43,638 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 00:46:43,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 00:46:43,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 00:46:43,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 00:46:43,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 00:46:43,640 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 00:46:43,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 00:46:43,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 00:46:43,641 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 00:46:43,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 00:46:43,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 00:46:43,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 00:46:43,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 00:46:43,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 00:46:43,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 00:46:43,642 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 00:46:43,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 00:46:43,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 00:46:43,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 00:46:43,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 00:46:43,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 00:46:43,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:46:43,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 00:46:43,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 00:46:43,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 00:46:43,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 00:46:43,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 00:46:43,645 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 00:46:43,645 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 00:46:43,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 00:46:43,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 00:46:43,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 00:46:43,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 00:46:43,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 00:46:43,867 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 00:46:43,868 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 00:46:43,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c [2022-01-10 00:46:43,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82c01b033/c35147d3b2a2404e83c9e377685ae79e/FLAG947bd6e18 [2022-01-10 00:46:44,336 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 00:46:44,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c [2022-01-10 00:46:44,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82c01b033/c35147d3b2a2404e83c9e377685ae79e/FLAG947bd6e18 [2022-01-10 00:46:44,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82c01b033/c35147d3b2a2404e83c9e377685ae79e [2022-01-10 00:46:44,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 00:46:44,369 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 00:46:44,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 00:46:44,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 00:46:44,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 00:46:44,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:46:44" (1/1) ... [2022-01-10 00:46:44,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ae2bd26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44, skipping insertion in model container [2022-01-10 00:46:44,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:46:44" (1/1) ... [2022-01-10 00:46:44,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 00:46:44,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 00:46:44,611 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2022-01-10 00:46:44,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:46:44,627 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 00:46:44,670 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2022-01-10 00:46:44,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:46:44,688 INFO L208 MainTranslator]: Completed translation [2022-01-10 00:46:44,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44 WrapperNode [2022-01-10 00:46:44,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 00:46:44,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 00:46:44,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 00:46:44,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 00:46:44,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44" (1/1) ... [2022-01-10 00:46:44,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44" (1/1) ... [2022-01-10 00:46:44,759 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 548 [2022-01-10 00:46:44,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 00:46:44,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 00:46:44,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 00:46:44,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 00:46:44,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44" (1/1) ... [2022-01-10 00:46:44,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44" (1/1) ... [2022-01-10 00:46:44,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44" (1/1) ... [2022-01-10 00:46:44,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44" (1/1) ... [2022-01-10 00:46:44,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44" (1/1) ... [2022-01-10 00:46:44,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44" (1/1) ... [2022-01-10 00:46:44,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44" (1/1) ... [2022-01-10 00:46:44,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 00:46:44,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 00:46:44,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 00:46:44,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 00:46:44,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44" (1/1) ... [2022-01-10 00:46:44,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:46:44,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:46:44,828 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) [2022-01-10 00:46:44,837 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 [2022-01-10 00:46:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 00:46:44,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 00:46:44,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 00:46:44,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 00:46:45,023 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 00:46:45,024 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 00:46:45,323 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 00:46:45,329 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 00:46:45,329 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 00:46:45,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:46:45 BoogieIcfgContainer [2022-01-10 00:46:45,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 00:46:45,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 00:46:45,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 00:46:45,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 00:46:45,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:46:44" (1/3) ... [2022-01-10 00:46:45,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa1ab7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:46:45, skipping insertion in model container [2022-01-10 00:46:45,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:46:44" (2/3) ... [2022-01-10 00:46:45,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa1ab7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:46:45, skipping insertion in model container [2022-01-10 00:46:45,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:46:45" (3/3) ... [2022-01-10 00:46:45,337 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.v+lhb-reducer.c [2022-01-10 00:46:45,341 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 00:46:45,342 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 00:46:45,377 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 00:46:45,384 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 00:46:45,384 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 00:46:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 52 states have (on average 1.8461538461538463) internal successors, (96), 53 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 00:46:45,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:46:45,402 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:46:45,402 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:46:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:46:45,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1627818147, now seen corresponding path program 1 times [2022-01-10 00:46:45,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:46:45,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975227049] [2022-01-10 00:46:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:46:45,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:46:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:46:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:45,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:46:45,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975227049] [2022-01-10 00:46:45,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975227049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:46:45,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:46:45,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 00:46:45,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208119220] [2022-01-10 00:46:45,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:46:45,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 00:46:45,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:46:45,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 00:46:45,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 00:46:45,744 INFO L87 Difference]: Start difference. First operand has 54 states, 52 states have (on average 1.8461538461538463) internal successors, (96), 53 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:45,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:46:45,828 INFO L93 Difference]: Finished difference Result 70 states and 109 transitions. [2022-01-10 00:46:45,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 00:46:45,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-10 00:46:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:46:45,837 INFO L225 Difference]: With dead ends: 70 [2022-01-10 00:46:45,837 INFO L226 Difference]: Without dead ends: 51 [2022-01-10 00:46:45,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 00:46:45,844 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 97 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:46:45,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 285 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 00:46:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-10 00:46:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-10 00:46:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-01-10 00:46:45,881 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 45 [2022-01-10 00:46:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:46:45,882 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-01-10 00:46:45,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-01-10 00:46:45,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 00:46:45,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:46:45,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:46:45,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 00:46:45,885 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:46:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:46:45,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1610807486, now seen corresponding path program 1 times [2022-01-10 00:46:45,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:46:45,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224244101] [2022-01-10 00:46:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:46:45,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:46:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:46:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:46,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:46:46,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224244101] [2022-01-10 00:46:46,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224244101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:46:46,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:46:46,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-10 00:46:46,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196048666] [2022-01-10 00:46:46,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:46:46,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 00:46:46,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:46:46,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 00:46:46,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-01-10 00:46:46,127 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:46,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:46:46,199 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-01-10 00:46:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 00:46:46,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-10 00:46:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:46:46,203 INFO L225 Difference]: With dead ends: 64 [2022-01-10 00:46:46,203 INFO L226 Difference]: Without dead ends: 57 [2022-01-10 00:46:46,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-01-10 00:46:46,209 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 00:46:46,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 116 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 00:46:46,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-10 00:46:46,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2022-01-10 00:46:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-01-10 00:46:46,223 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 45 [2022-01-10 00:46:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:46:46,225 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-01-10 00:46:46,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:46,227 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-01-10 00:46:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 00:46:46,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:46:46,230 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:46:46,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 00:46:46,230 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:46:46,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:46:46,231 INFO L85 PathProgramCache]: Analyzing trace with hash -234002152, now seen corresponding path program 1 times [2022-01-10 00:46:46,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:46:46,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232359661] [2022-01-10 00:46:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:46:46,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:46:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:46:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:46,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:46:46,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232359661] [2022-01-10 00:46:46,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232359661] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:46:46,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:46:46,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:46:46,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281648215] [2022-01-10 00:46:46,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:46:46,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:46:46,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:46:46,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:46:46,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:46:46,322 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:46:46,333 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-01-10 00:46:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:46:46,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-10 00:46:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:46:46,335 INFO L225 Difference]: With dead ends: 67 [2022-01-10 00:46:46,335 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 00:46:46,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:46:46,336 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:46:46,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 00:46:46,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 00:46:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-10 00:46:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-01-10 00:46:46,341 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 50 [2022-01-10 00:46:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:46:46,342 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-01-10 00:46:46,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-01-10 00:46:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 00:46:46,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:46:46,343 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:46:46,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 00:46:46,343 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:46:46,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:46:46,344 INFO L85 PathProgramCache]: Analyzing trace with hash -686591427, now seen corresponding path program 1 times [2022-01-10 00:46:46,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:46:46,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948005710] [2022-01-10 00:46:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:46:46,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:46:46,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:46:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:46,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:46:46,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948005710] [2022-01-10 00:46:46,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948005710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:46:46,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760386444] [2022-01-10 00:46:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:46:46,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:46:46,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:46:46,559 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) [2022-01-10 00:46:46,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 00:46:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:46:46,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 00:46:46,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:46:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:46,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:46:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:47,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760386444] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 00:46:47,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 00:46:47,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-01-10 00:46:47,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875496157] [2022-01-10 00:46:47,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 00:46:47,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 00:46:47,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:46:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 00:46:47,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-01-10 00:46:47,282 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:46:47,394 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2022-01-10 00:46:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 00:46:47,395 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-10 00:46:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:46:47,400 INFO L225 Difference]: With dead ends: 119 [2022-01-10 00:46:47,400 INFO L226 Difference]: Without dead ends: 112 [2022-01-10 00:46:47,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-01-10 00:46:47,408 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 183 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 00:46:47,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 150 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 00:46:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-10 00:46:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-01-10 00:46:47,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-01-10 00:46:47,418 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 50 [2022-01-10 00:46:47,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:46:47,418 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-01-10 00:46:47,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:47,418 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-01-10 00:46:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 00:46:47,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:46:47,424 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:46:47,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 00:46:47,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:46:47,645 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:46:47,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:46:47,645 INFO L85 PathProgramCache]: Analyzing trace with hash 723240189, now seen corresponding path program 2 times [2022-01-10 00:46:47,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:46:47,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191080163] [2022-01-10 00:46:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:46:47,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:46:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:46:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:48,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:46:48,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191080163] [2022-01-10 00:46:48,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191080163] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:46:48,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671552971] [2022-01-10 00:46:48,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 00:46:48,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:46:48,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:46:48,054 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) [2022-01-10 00:46:48,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 00:46:48,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 00:46:48,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 00:46:48,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 00:46:48,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:46:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:48,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:46:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:49,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671552971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 00:46:49,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 00:46:49,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-01-10 00:46:49,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500167754] [2022-01-10 00:46:49,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 00:46:49,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-10 00:46:49,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:46:49,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-10 00:46:49,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 00:46:49,368 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 49 states, 49 states have (on average 4.469387755102041) internal successors, (219), 49 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:46:49,570 INFO L93 Difference]: Finished difference Result 239 states and 264 transitions. [2022-01-10 00:46:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-10 00:46:49,580 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.469387755102041) internal successors, (219), 49 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2022-01-10 00:46:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:46:49,581 INFO L225 Difference]: With dead ends: 239 [2022-01-10 00:46:49,581 INFO L226 Difference]: Without dead ends: 232 [2022-01-10 00:46:49,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 00:46:49,583 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 379 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 00:46:49,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 219 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 00:46:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-10 00:46:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-01-10 00:46:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0086580086580086) internal successors, (233), 231 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2022-01-10 00:46:49,605 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 110 [2022-01-10 00:46:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:46:49,606 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2022-01-10 00:46:49,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.469387755102041) internal successors, (219), 49 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2022-01-10 00:46:49,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-10 00:46:49,609 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:46:49,609 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:46:49,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 00:46:49,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:46:49,824 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:46:49,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:46:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash -54490499, now seen corresponding path program 3 times [2022-01-10 00:46:49,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:46:49,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731989635] [2022-01-10 00:46:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:46:49,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:46:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:46:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:50,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:46:50,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731989635] [2022-01-10 00:46:50,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731989635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:46:50,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003727577] [2022-01-10 00:46:50,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 00:46:50,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:46:50,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:46:50,912 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) [2022-01-10 00:46:50,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 00:46:51,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2022-01-10 00:46:51,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 00:46:51,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 2026 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-10 00:46:51,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:46:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:51,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:46:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:54,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003727577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 00:46:54,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 00:46:54,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-01-10 00:46:54,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090924335] [2022-01-10 00:46:54,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 00:46:54,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-10 00:46:54,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:46:54,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-10 00:46:54,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-01-10 00:46:54,490 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand has 97 states, 97 states have (on average 4.731958762886598) internal successors, (459), 97 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:46:54,988 INFO L93 Difference]: Finished difference Result 479 states and 528 transitions. [2022-01-10 00:46:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-10 00:46:54,988 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.731958762886598) internal successors, (459), 97 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-01-10 00:46:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:46:54,991 INFO L225 Difference]: With dead ends: 479 [2022-01-10 00:46:54,991 INFO L226 Difference]: Without dead ends: 472 [2022-01-10 00:46:54,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-01-10 00:46:54,995 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 804 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 00:46:54,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 377 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 00:46:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-10 00:46:55,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 472. [2022-01-10 00:46:55,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 1.0042462845010616) internal successors, (473), 471 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 473 transitions. [2022-01-10 00:46:55,035 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 473 transitions. Word has length 230 [2022-01-10 00:46:55,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:46:55,036 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 473 transitions. [2022-01-10 00:46:55,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.731958762886598) internal successors, (459), 97 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:46:55,036 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 473 transitions. [2022-01-10 00:46:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-01-10 00:46:55,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:46:55,047 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:46:55,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 00:46:55,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:46:55,264 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:46:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:46:55,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1315269251, now seen corresponding path program 4 times [2022-01-10 00:46:55,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:46:55,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054378666] [2022-01-10 00:46:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:46:55,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:46:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:46:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:46:58,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:46:58,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054378666] [2022-01-10 00:46:58,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054378666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:46:58,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561636153] [2022-01-10 00:46:58,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 00:46:58,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:46:58,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:46:58,784 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) [2022-01-10 00:46:58,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 00:46:59,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 00:46:59,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 00:46:59,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 4042 conjuncts, 96 conjunts are in the unsatisfiable core [2022-01-10 00:46:59,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:47:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:47:00,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:47:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:47:09,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561636153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 00:47:09,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 00:47:09,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-01-10 00:47:09,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269972597] [2022-01-10 00:47:09,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 00:47:09,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-01-10 00:47:09,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:47:09,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-01-10 00:47:09,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-01-10 00:47:09,099 INFO L87 Difference]: Start difference. First operand 472 states and 473 transitions. Second operand has 193 states, 193 states have (on average 4.865284974093265) internal successors, (939), 193 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:47:10,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:47:10,537 INFO L93 Difference]: Finished difference Result 959 states and 1056 transitions. [2022-01-10 00:47:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-01-10 00:47:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.865284974093265) internal successors, (939), 193 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 470 [2022-01-10 00:47:10,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:47:10,541 INFO L225 Difference]: With dead ends: 959 [2022-01-10 00:47:10,541 INFO L226 Difference]: Without dead ends: 952 [2022-01-10 00:47:10,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1035 GetRequests, 844 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-01-10 00:47:10,544 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2510 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2510 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 00:47:10,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2510 Valid, 651 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 00:47:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-01-10 00:47:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 952. [2022-01-10 00:47:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 1.0021030494216614) internal successors, (953), 951 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:47:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 953 transitions. [2022-01-10 00:47:10,568 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 953 transitions. Word has length 470 [2022-01-10 00:47:10,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:47:10,568 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 953 transitions. [2022-01-10 00:47:10,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.865284974093265) internal successors, (939), 193 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 00:47:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 953 transitions. [2022-01-10 00:47:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2022-01-10 00:47:10,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:47:10,595 INFO L514 BasicCegarLoop]: trace histogram [182, 181, 181, 181, 181, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:47:10,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 00:47:10,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:47:10,811 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:47:10,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:47:10,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2073078653, now seen corresponding path program 5 times [2022-01-10 00:47:10,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:47:10,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13815117] [2022-01-10 00:47:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:47:10,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:47:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:47:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:47:23,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:47:23,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13815117] [2022-01-10 00:47:23,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13815117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:47:23,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637238011] [2022-01-10 00:47:23,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 00:47:23,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:47:23,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:47:23,056 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) [2022-01-10 00:47:23,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 00:47:25,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 182 check-sat command(s) [2022-01-10 00:47:25,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 00:47:25,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 8074 conjuncts, 192 conjunts are in the unsatisfiable core [2022-01-10 00:47:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:47:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:47:27,352 INFO L328 TraceCheckSpWp]: Computing backward predicates...