/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_Bitvector.epf -i ../../../trunk/examples/svcomp/float-benchs/rlim_exit.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 05:58:14,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 05:58:14,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 05:58:14,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 05:58:14,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 05:58:14,632 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 05:58:14,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 05:58:14,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 05:58:14,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 05:58:14,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 05:58:14,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 05:58:14,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 05:58:14,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 05:58:14,634 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 05:58:14,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 05:58:14,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 05:58:14,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 05:58:14,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 05:58:14,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 05:58:14,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 05:58:14,634 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 05:58:14,634 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 05:58:14,634 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 05:58:14,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 05:58:14,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 05:58:14,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 05:58:14,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 05:58:14,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 05:58:14,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:58:14,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 05:58:14,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 05:58:14,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 05:58:14,636 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 05:58:14,636 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 05:58:14,636 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 05:58:14,636 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 05:58:14,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 05:58:14,636 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 05:58:14,636 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 05:58:14,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 05:58:14,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 05:58:14,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 05:58:14,881 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 05:58:14,882 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 05:58:14,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/rlim_exit.c [2022-01-10 05:58:14,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4b16b888/3a9eb2ed0b76495f9dede57ae7180f92/FLAGd52b6d99e [2022-01-10 05:58:15,296 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 05:58:15,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/rlim_exit.c [2022-01-10 05:58:15,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4b16b888/3a9eb2ed0b76495f9dede57ae7180f92/FLAGd52b6d99e [2022-01-10 05:58:15,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4b16b888/3a9eb2ed0b76495f9dede57ae7180f92 [2022-01-10 05:58:15,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 05:58:15,311 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 05:58:15,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 05:58:15,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 05:58:15,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 05:58:15,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:58:15" (1/1) ... [2022-01-10 05:58:15,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5178a7d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15, skipping insertion in model container [2022-01-10 05:58:15,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:58:15" (1/1) ... [2022-01-10 05:58:15,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 05:58:15,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 05:58:15,454 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/rlim_exit.c[446,459] [2022-01-10 05:58:15,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:58:15,472 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 05:58:15,480 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/rlim_exit.c[446,459] [2022-01-10 05:58:15,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:58:15,492 INFO L208 MainTranslator]: Completed translation [2022-01-10 05:58:15,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15 WrapperNode [2022-01-10 05:58:15,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 05:58:15,495 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 05:58:15,495 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 05:58:15,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 05:58:15,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15" (1/1) ... [2022-01-10 05:58:15,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15" (1/1) ... [2022-01-10 05:58:15,517 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-01-10 05:58:15,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 05:58:15,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 05:58:15,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 05:58:15,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 05:58:15,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15" (1/1) ... [2022-01-10 05:58:15,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15" (1/1) ... [2022-01-10 05:58:15,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15" (1/1) ... [2022-01-10 05:58:15,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15" (1/1) ... [2022-01-10 05:58:15,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15" (1/1) ... [2022-01-10 05:58:15,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15" (1/1) ... [2022-01-10 05:58:15,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15" (1/1) ... [2022-01-10 05:58:15,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 05:58:15,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 05:58:15,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 05:58:15,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 05:58:15,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15" (1/1) ... [2022-01-10 05:58:15,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:58:15,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 05:58:15,567 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 05:58:15,591 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 05:58:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 05:58:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 05:58:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 05:58:15,603 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 05:58:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 05:58:15,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 05:58:15,652 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 05:58:15,653 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 05:58:15,737 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 05:58:15,741 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 05:58:15,741 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 05:58:15,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:58:15 BoogieIcfgContainer [2022-01-10 05:58:15,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 05:58:15,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 05:58:15,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 05:58:15,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 05:58:15,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 05:58:15" (1/3) ... [2022-01-10 05:58:15,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7239c9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:58:15, skipping insertion in model container [2022-01-10 05:58:15,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:58:15" (2/3) ... [2022-01-10 05:58:15,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7239c9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:58:15, skipping insertion in model container [2022-01-10 05:58:15,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:58:15" (3/3) ... [2022-01-10 05:58:15,748 INFO L111 eAbstractionObserver]: Analyzing ICFG rlim_exit.c [2022-01-10 05:58:15,751 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 05:58:15,751 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 05:58:15,788 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 05:58:15,806 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 05:58:15,806 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 05:58:15,827 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 05:58:15,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 05:58:15,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:58:15,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 05:58:15,831 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:58:15,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:58:15,834 INFO L85 PathProgramCache]: Analyzing trace with hash 889617946, now seen corresponding path program 1 times [2022-01-10 05:58:15,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:58:15,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202390334] [2022-01-10 05:58:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:58:15,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:58:15,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:58:15,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:58:15,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 05:58:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:58:15,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:58:15,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:58:15,968 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 05:58:15,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:58:15,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:58:15,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202390334] [2022-01-10 05:58:15,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202390334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:58:15,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:58:15,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:58:15,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954494356] [2022-01-10 05:58:15,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:58:15,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:58:15,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:58:16,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:58:16,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:58:16,004 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 05:58:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:58:16,043 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2022-01-10 05:58:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:58:16,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-01-10 05:58:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:58:16,051 INFO L225 Difference]: With dead ends: 47 [2022-01-10 05:58:16,051 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 05:58:16,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 05:58:16,057 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:58:16,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 05:58:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 05:58:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-01-10 05:58:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 05:58:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-01-10 05:58:16,088 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 6 [2022-01-10 05:58:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:58:16,089 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-01-10 05:58:16,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 05:58:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-01-10 05:58:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 05:58:16,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:58:16,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:58:16,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 05:58:16,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:58:16,300 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:58:16,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:58:16,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1329688190, now seen corresponding path program 1 times [2022-01-10 05:58:16,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:58:16,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616426562] [2022-01-10 05:58:16,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:58:16,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:58:16,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:58:16,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:58:16,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 05:58:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:58:16,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:58:16,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:58:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 05:58:16,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:58:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 05:58:16,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:58:16,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616426562] [2022-01-10 05:58:16,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616426562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:58:16,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:58:16,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 05:58:16,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117209021] [2022-01-10 05:58:16,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:58:16,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 05:58:16,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:58:16,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 05:58:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 05:58:16,530 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 05:58:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:58:16,604 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2022-01-10 05:58:16,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 05:58:16,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-01-10 05:58:16,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:58:16,606 INFO L225 Difference]: With dead ends: 43 [2022-01-10 05:58:16,606 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 05:58:16,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 05:58:16,607 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:58:16,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 68 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 05:58:16,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 05:58:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-01-10 05:58:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 05:58:16,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2022-01-10 05:58:16,615 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 20 [2022-01-10 05:58:16,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:58:16,615 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2022-01-10 05:58:16,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 05:58:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2022-01-10 05:58:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 05:58:16,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:58:16,617 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-01-10 05:58:16,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 05:58:16,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:58:16,823 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:58:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:58:16,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1445218234, now seen corresponding path program 2 times [2022-01-10 05:58:16,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:58:16,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433551812] [2022-01-10 05:58:16,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 05:58:16,825 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:58:16,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:58:16,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:58:16,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 05:58:16,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 05:58:16,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 05:58:16,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 05:58:16,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:58:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-10 05:58:17,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:58:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-10 05:58:17,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:58:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433551812] [2022-01-10 05:58:17,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433551812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:58:17,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:58:17,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 05:58:17,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565105769] [2022-01-10 05:58:17,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:58:17,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 05:58:17,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:58:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 05:58:17,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 05:58:17,230 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-10 05:58:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:58:17,470 INFO L93 Difference]: Finished difference Result 85 states and 129 transitions. [2022-01-10 05:58:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 05:58:17,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 62 [2022-01-10 05:58:17,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:58:17,473 INFO L225 Difference]: With dead ends: 85 [2022-01-10 05:58:17,473 INFO L226 Difference]: Without dead ends: 81 [2022-01-10 05:58:17,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 05:58:17,474 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 159 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:58:17,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 269 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 05:58:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-10 05:58:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-01-10 05:58:17,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-10 05:58:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 120 transitions. [2022-01-10 05:58:17,498 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 120 transitions. Word has length 62 [2022-01-10 05:58:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:58:17,498 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 120 transitions. [2022-01-10 05:58:17,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-10 05:58:17,501 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 120 transitions. [2022-01-10 05:58:17,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-10 05:58:17,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:58:17,508 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-01-10 05:58:17,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 05:58:17,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:58:17,715 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:58:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:58:17,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1026727382, now seen corresponding path program 3 times [2022-01-10 05:58:17,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:58:17,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890092001] [2022-01-10 05:58:17,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 05:58:17,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:58:17,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:58:17,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:58:17,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 05:58:17,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-01-10 05:58:17,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 05:58:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 05:58:17,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:58:18,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-01-10 05:58:18,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:58:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-01-10 05:58:18,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:58:18,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890092001] [2022-01-10 05:58:18,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890092001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:58:18,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:58:18,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 05:58:18,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362221670] [2022-01-10 05:58:18,646 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:58:18,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 05:58:18,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:58:18,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 05:58:18,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 05:58:18,648 INFO L87 Difference]: Start difference. First operand 81 states and 120 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 20 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 20 states have call predecessors, (40), 20 states have call successors, (40) [2022-01-10 05:58:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:58:19,656 INFO L93 Difference]: Finished difference Result 169 states and 267 transitions. [2022-01-10 05:58:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 05:58:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 20 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 20 states have call predecessors, (40), 20 states have call successors, (40) Word has length 146 [2022-01-10 05:58:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:58:19,659 INFO L225 Difference]: With dead ends: 169 [2022-01-10 05:58:19,659 INFO L226 Difference]: Without dead ends: 165 [2022-01-10 05:58:19,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 05:58:19,661 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 462 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 05:58:19,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 1049 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 05:58:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-10 05:58:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-01-10 05:58:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 119 states have (on average 1.3781512605042017) internal successors, (164), 119 states have internal predecessors, (164), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-01-10 05:58:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 252 transitions. [2022-01-10 05:58:19,679 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 252 transitions. Word has length 146 [2022-01-10 05:58:19,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:58:19,679 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 252 transitions. [2022-01-10 05:58:19,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 24 states have internal predecessors, (91), 20 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 20 states have call predecessors, (40), 20 states have call successors, (40) [2022-01-10 05:58:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 252 transitions. [2022-01-10 05:58:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-01-10 05:58:19,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:58:19,683 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-01-10 05:58:19,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 05:58:19,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:58:19,892 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:58:19,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:58:19,893 INFO L85 PathProgramCache]: Analyzing trace with hash 680021770, now seen corresponding path program 4 times [2022-01-10 05:58:19,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:58:19,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569970904] [2022-01-10 05:58:19,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 05:58:19,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:58:19,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:58:19,895 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:58:19,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 05:58:20,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 05:58:20,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 05:58:20,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 05:58:20,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:58:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2022-01-10 05:58:20,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:58:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2022-01-10 05:58:22,291 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:58:22,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569970904] [2022-01-10 05:58:22,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569970904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:58:22,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:58:22,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-10 05:58:22,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909285324] [2022-01-10 05:58:22,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:58:22,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-10 05:58:22,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:58:22,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-10 05:58:22,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 05:58:22,294 INFO L87 Difference]: Start difference. First operand 165 states and 252 transitions. Second operand has 48 states, 48 states have (on average 3.8958333333333335) internal successors, (187), 48 states have internal predecessors, (187), 44 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 44 states have call predecessors, (88), 44 states have call successors, (88) [2022-01-10 05:58:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:58:28,161 INFO L93 Difference]: Finished difference Result 337 states and 543 transitions. [2022-01-10 05:58:28,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-10 05:58:28,161 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.8958333333333335) internal successors, (187), 48 states have internal predecessors, (187), 44 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 44 states have call predecessors, (88), 44 states have call successors, (88) Word has length 314 [2022-01-10 05:58:28,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:58:28,164 INFO L225 Difference]: With dead ends: 337 [2022-01-10 05:58:28,164 INFO L226 Difference]: Without dead ends: 333 [2022-01-10 05:58:28,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2022-01-10 05:58:28,167 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 1782 mSDsluCounter, 3859 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1786 SdHoareTripleChecker+Valid, 4121 SdHoareTripleChecker+Invalid, 2849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:58:28,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1786 Valid, 4121 Invalid, 2849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 05:58:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-10 05:58:28,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2022-01-10 05:58:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 239 states have (on average 1.389121338912134) internal successors, (332), 239 states have internal predecessors, (332), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-01-10 05:58:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 516 transitions. [2022-01-10 05:58:28,192 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 516 transitions. Word has length 314 [2022-01-10 05:58:28,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:58:28,193 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 516 transitions. [2022-01-10 05:58:28,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.8958333333333335) internal successors, (187), 48 states have internal predecessors, (187), 44 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 44 states have call predecessors, (88), 44 states have call successors, (88) [2022-01-10 05:58:28,193 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 516 transitions. [2022-01-10 05:58:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-01-10 05:58:28,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:58:28,204 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-01-10 05:58:28,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 05:58:28,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:58:28,415 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:58:28,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:58:28,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1781598410, now seen corresponding path program 5 times [2022-01-10 05:58:28,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:58:28,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406714342] [2022-01-10 05:58:28,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 05:58:28,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:58:28,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:58:28,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:58:28,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 05:58:29,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2022-01-10 05:58:29,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 05:58:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-10 05:58:29,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:58:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 23000 backedges. 0 proven. 6256 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2022-01-10 05:58:30,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 05:58:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 23000 backedges. 0 proven. 6256 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2022-01-10 05:58:37,601 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:58:37,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406714342] [2022-01-10 05:58:37,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406714342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 05:58:37,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 05:58:37,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 97 [2022-01-10 05:58:37,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298994114] [2022-01-10 05:58:37,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 05:58:37,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-10 05:58:37,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:58:37,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-10 05:58:37,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2448, Invalid=6864, Unknown=0, NotChecked=0, Total=9312 [2022-01-10 05:58:37,606 INFO L87 Difference]: Start difference. First operand 333 states and 516 transitions. Second operand has 97 states, 97 states have (on average 3.9072164948453607) internal successors, (379), 97 states have internal predecessors, (379), 92 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 92 states have call predecessors, (184), 92 states have call successors, (184) [2022-01-10 05:59:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:59:27,922 INFO L93 Difference]: Finished difference Result 673 states and 1095 transitions. [2022-01-10 05:59:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-10 05:59:27,923 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.9072164948453607) internal successors, (379), 97 states have internal predecessors, (379), 92 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 92 states have call predecessors, (184), 92 states have call successors, (184) Word has length 650 [2022-01-10 05:59:27,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:59:27,927 INFO L225 Difference]: With dead ends: 673 [2022-01-10 05:59:27,927 INFO L226 Difference]: Without dead ends: 669 [2022-01-10 05:59:27,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1345 GetRequests, 1200 SyntacticMatches, 3 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=7004, Invalid=13588, Unknown=0, NotChecked=0, Total=20592 [2022-01-10 05:59:27,932 INFO L933 BasicCegarLoop]: 526 mSDtfsCounter, 7563 mSDsluCounter, 15979 mSDsCounter, 0 mSdLazyCounter, 11481 mSolverCounterSat, 597 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7567 SdHoareTripleChecker+Valid, 16505 SdHoareTripleChecker+Invalid, 12078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 11481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-01-10 05:59:27,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7567 Valid, 16505 Invalid, 12078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [597 Valid, 11481 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-01-10 05:59:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-10 05:59:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 669. [2022-01-10 05:59:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 479 states have (on average 1.394572025052192) internal successors, (668), 479 states have internal predecessors, (668), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2022-01-10 05:59:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1044 transitions. [2022-01-10 05:59:27,964 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1044 transitions. Word has length 650 [2022-01-10 05:59:27,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:59:27,965 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1044 transitions. [2022-01-10 05:59:27,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.9072164948453607) internal successors, (379), 97 states have internal predecessors, (379), 92 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 92 states have call predecessors, (184), 92 states have call successors, (184) [2022-01-10 05:59:27,965 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1044 transitions. [2022-01-10 05:59:27,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1323 [2022-01-10 05:59:27,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:59:27,976 INFO L514 BasicCegarLoop]: trace histogram [188, 188, 188, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2022-01-10 05:59:27,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 05:59:28,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 05:59:28,186 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:59:28,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:59:28,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1160905654, now seen corresponding path program 6 times [2022-01-10 05:59:28,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:59:28,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423237010] [2022-01-10 05:59:28,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 05:59:28,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:59:28,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:59:28,189 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 05:59:28,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process