/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/loops-crafted-1/in-de42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:51:31,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:51:31,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:51:31,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:51:31,516 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 02:51:31,540 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:51:31,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:51:31,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:51:31,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:51:31,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:51:31,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:51:31,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:51:31,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:51:31,542 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:51:31,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:51:31,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:51:31,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:51:31,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:51:31,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:51:31,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:51:31,548 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:51:31,548 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:51:31,548 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:51:31,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:51:31,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:51:31,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:51:31,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:51:31,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:51:31,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:51:31,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:51:31,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:51:31,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:51:31,550 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:51:31,551 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:51:31,551 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:51:31,551 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:51:31,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:51:31,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:51:31,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:51:31,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:51:31,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:51:31,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:51:31,830 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:51:31,830 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:51:31,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de42.c [2022-01-10 02:51:31,889 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1040da5a7/0258c50242d04bb7b778a680691b8a0b/FLAGc59fa98b7 [2022-01-10 02:51:32,286 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:51:32,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de42.c [2022-01-10 02:51:32,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1040da5a7/0258c50242d04bb7b778a680691b8a0b/FLAGc59fa98b7 [2022-01-10 02:51:32,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1040da5a7/0258c50242d04bb7b778a680691b8a0b [2022-01-10 02:51:32,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:51:32,708 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:51:32,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:51:32,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:51:32,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:51:32,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:51:32" (1/1) ... [2022-01-10 02:51:32,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53452632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32, skipping insertion in model container [2022-01-10 02:51:32,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:51:32" (1/1) ... [2022-01-10 02:51:32,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:51:32,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:51:32,915 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de42.c[368,381] [2022-01-10 02:51:32,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:51:32,959 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:51:32,970 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de42.c[368,381] [2022-01-10 02:51:32,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:51:32,993 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:51:32,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32 WrapperNode [2022-01-10 02:51:32,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:51:32,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:51:32,995 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:51:32,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:51:33,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32" (1/1) ... [2022-01-10 02:51:33,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32" (1/1) ... [2022-01-10 02:51:33,029 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-01-10 02:51:33,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:51:33,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:51:33,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:51:33,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:51:33,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32" (1/1) ... [2022-01-10 02:51:33,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32" (1/1) ... [2022-01-10 02:51:33,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32" (1/1) ... [2022-01-10 02:51:33,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32" (1/1) ... [2022-01-10 02:51:33,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32" (1/1) ... [2022-01-10 02:51:33,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32" (1/1) ... [2022-01-10 02:51:33,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32" (1/1) ... [2022-01-10 02:51:33,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:51:33,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:51:33,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:51:33,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:51:33,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32" (1/1) ... [2022-01-10 02:51:33,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:51:33,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:51:33,101 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 02:51:33,123 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 02:51:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:51:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:51:33,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:51:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:51:33,204 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:51:33,206 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:51:33,373 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:51:33,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:51:33,393 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-10 02:51:33,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:51:33 BoogieIcfgContainer [2022-01-10 02:51:33,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:51:33,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:51:33,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:51:33,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:51:33,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:51:32" (1/3) ... [2022-01-10 02:51:33,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ee02cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:51:33, skipping insertion in model container [2022-01-10 02:51:33,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:51:32" (2/3) ... [2022-01-10 02:51:33,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ee02cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:51:33, skipping insertion in model container [2022-01-10 02:51:33,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:51:33" (3/3) ... [2022-01-10 02:51:33,401 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de42.c [2022-01-10 02:51:33,405 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:51:33,405 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:51:33,440 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:51:33,445 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 02:51:33,446 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:51:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 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 02:51:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 02:51:33,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:33,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:33,461 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:33,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1522018600, now seen corresponding path program 1 times [2022-01-10 02:51:33,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:33,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729643549] [2022-01-10 02:51:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:33,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:33,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:33,503 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 02:51:33,505 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 02:51:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:33,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 02:51:33,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:33,623 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 02:51:33,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:51:33,624 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:33,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729643549] [2022-01-10 02:51:33,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729643549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:51:33,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:51:33,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 02:51:33,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306504038] [2022-01-10 02:51:33,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:51:33,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 02:51:33,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:33,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 02:51:33,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:51:33,661 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 02:51:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:33,672 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2022-01-10 02:51:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 02:51:33,674 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2022-01-10 02:51:33,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:33,681 INFO L225 Difference]: With dead ends: 27 [2022-01-10 02:51:33,681 INFO L226 Difference]: Without dead ends: 11 [2022-01-10 02:51:33,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:51:33,686 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:33,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:51:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-01-10 02:51:33,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-01-10 02:51:33,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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 02:51:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-01-10 02:51:33,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 10 [2022-01-10 02:51:33,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:33,716 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-01-10 02:51:33,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 02:51:33,716 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-01-10 02:51:33,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 02:51:33,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:33,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:33,728 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 02:51:33,925 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 02:51:33,926 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:33,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:33,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1522137764, now seen corresponding path program 1 times [2022-01-10 02:51:33,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:33,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417938629] [2022-01-10 02:51:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:33,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:33,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:33,929 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 02:51:33,931 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 02:51:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:33,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:51:33,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:34,207 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 02:51:34,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:51:34,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:34,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417938629] [2022-01-10 02:51:34,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417938629] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:51:34,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:51:34,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:51:34,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833606104] [2022-01-10 02:51:34,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:51:34,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:51:34,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:34,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:51:34,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:51:34,211 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 02:51:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:34,361 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2022-01-10 02:51:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:51:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 10 [2022-01-10 02:51:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:34,362 INFO L225 Difference]: With dead ends: 33 [2022-01-10 02:51:34,362 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 02:51:34,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:51:34,364 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:34,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 36 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:51:34,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 02:51:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2022-01-10 02:51:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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 02:51:34,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-01-10 02:51:34,369 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 10 [2022-01-10 02:51:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:34,369 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-01-10 02:51:34,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 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 02:51:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-01-10 02:51:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 02:51:34,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:34,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:34,380 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 02:51:34,577 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 02:51:34,578 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:34,578 INFO L85 PathProgramCache]: Analyzing trace with hash 923648321, now seen corresponding path program 1 times [2022-01-10 02:51:34,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:34,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031899197] [2022-01-10 02:51:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:34,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:34,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:34,581 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 02:51:34,582 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 02:51:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:34,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:51:34,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:34,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:34,690 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:34,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031899197] [2022-01-10 02:51:34,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031899197] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:34,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:34,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 02:51:34,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676470267] [2022-01-10 02:51:34,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:34,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:51:34,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:34,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:51:34,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:51:34,693 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 02:51:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:34,800 INFO L93 Difference]: Finished difference Result 40 states and 61 transitions. [2022-01-10 02:51:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:51:34,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 11 [2022-01-10 02:51:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:34,805 INFO L225 Difference]: With dead ends: 40 [2022-01-10 02:51:34,805 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 02:51:34,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:51:34,811 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:34,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 34 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:51:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 02:51:34,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-01-10 02:51:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 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 02:51:34,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-10 02:51:34,830 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 11 [2022-01-10 02:51:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:34,830 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-10 02:51:34,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 02:51:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-10 02:51:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 02:51:34,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:34,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:34,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 02:51:35,040 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 02:51:35,040 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:35,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:35,041 INFO L85 PathProgramCache]: Analyzing trace with hash -491381764, now seen corresponding path program 1 times [2022-01-10 02:51:35,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:35,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848311825] [2022-01-10 02:51:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:35,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:35,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:35,043 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 02:51:35,044 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 02:51:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:35,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:51:35,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:51:35,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:51:35,107 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:35,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848311825] [2022-01-10 02:51:35,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848311825] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:51:35,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:51:35,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:51:35,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030232933] [2022-01-10 02:51:35,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:51:35,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:51:35,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:35,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:51:35,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:51:35,109 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 02:51:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:35,137 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-01-10 02:51:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:51:35,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2022-01-10 02:51:35,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:35,138 INFO L225 Difference]: With dead ends: 40 [2022-01-10 02:51:35,138 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 02:51:35,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:51:35,140 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:35,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 25 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:51:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 02:51:35,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2022-01-10 02:51:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 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 02:51:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-01-10 02:51:35,149 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 12 [2022-01-10 02:51:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:35,149 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-01-10 02:51:35,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 02:51:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-01-10 02:51:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 02:51:35,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:35,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:35,160 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 02:51:35,359 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 02:51:35,359 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:35,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:35,360 INFO L85 PathProgramCache]: Analyzing trace with hash 607187538, now seen corresponding path program 1 times [2022-01-10 02:51:35,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:35,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681336164] [2022-01-10 02:51:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:35,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:35,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:35,362 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 02:51:35,364 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 02:51:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:35,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:51:35,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:51:35,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:51:35,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:35,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681336164] [2022-01-10 02:51:35,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681336164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:35,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:35,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:51:35,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167296273] [2022-01-10 02:51:35,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:35,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:51:35,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:35,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:51:35,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:51:35,466 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 02:51:35,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:35,510 INFO L93 Difference]: Finished difference Result 57 states and 84 transitions. [2022-01-10 02:51:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:51:35,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 13 [2022-01-10 02:51:35,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:35,512 INFO L225 Difference]: With dead ends: 57 [2022-01-10 02:51:35,512 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 02:51:35,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:51:35,513 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:35,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:51:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 02:51:35,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-01-10 02:51:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 states have internal predecessors, (67), 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 02:51:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 67 transitions. [2022-01-10 02:51:35,523 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 67 transitions. Word has length 13 [2022-01-10 02:51:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:35,523 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 67 transitions. [2022-01-10 02:51:35,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 02:51:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 67 transitions. [2022-01-10 02:51:35,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 02:51:35,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:35,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:35,538 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 02:51:35,732 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 02:51:35,732 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:35,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1644609900, now seen corresponding path program 1 times [2022-01-10 02:51:35,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:35,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826763953] [2022-01-10 02:51:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:35,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:35,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:35,735 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 02:51:35,735 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 02:51:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:35,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 02:51:35,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:35,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:36,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826763953] [2022-01-10 02:51:36,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826763953] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:36,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:36,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:51:36,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943896341] [2022-01-10 02:51:36,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:36,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:51:36,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:36,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:51:36,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:51:36,210 INFO L87 Difference]: Start difference. First operand 46 states and 67 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 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 02:51:36,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:36,514 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2022-01-10 02:51:36,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 02:51:36,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 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 14 [2022-01-10 02:51:36,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:36,515 INFO L225 Difference]: With dead ends: 58 [2022-01-10 02:51:36,515 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 02:51:36,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-10 02:51:36,517 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:36,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 56 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:51:36,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 02:51:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-01-10 02:51:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 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 02:51:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 50 transitions. [2022-01-10 02:51:36,523 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 50 transitions. Word has length 14 [2022-01-10 02:51:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:36,524 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 50 transitions. [2022-01-10 02:51:36,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 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 02:51:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 50 transitions. [2022-01-10 02:51:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 02:51:36,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:36,527 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:36,537 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 02:51:36,735 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 02:51:36,736 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:36,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1219996004, now seen corresponding path program 2 times [2022-01-10 02:51:36,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:36,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529592491] [2022-01-10 02:51:36,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:51:36,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:36,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:36,738 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 02:51:36,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 02:51:36,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:51:36,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:51:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:36,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:36,907 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:36,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529592491] [2022-01-10 02:51:36,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529592491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:36,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:36,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 02:51:36,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152234220] [2022-01-10 02:51:36,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:36,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:51:36,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:51:36,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:51:36,909 INFO L87 Difference]: Start difference. First operand 34 states and 50 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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 02:51:37,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:37,295 INFO L93 Difference]: Finished difference Result 141 states and 245 transitions. [2022-01-10 02:51:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 02:51:37,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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 14 [2022-01-10 02:51:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:37,300 INFO L225 Difference]: With dead ends: 141 [2022-01-10 02:51:37,300 INFO L226 Difference]: Without dead ends: 129 [2022-01-10 02:51:37,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2022-01-10 02:51:37,302 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 139 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:37,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 85 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:51:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-10 02:51:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 72. [2022-01-10 02:51:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 71 states have internal predecessors, (105), 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 02:51:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2022-01-10 02:51:37,316 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 14 [2022-01-10 02:51:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:37,316 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2022-01-10 02:51:37,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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 02:51:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2022-01-10 02:51:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 02:51:37,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:37,317 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:37,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:37,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:37,518 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:37,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:37,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1176713020, now seen corresponding path program 2 times [2022-01-10 02:51:37,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:37,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981449894] [2022-01-10 02:51:37,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:51:37,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:37,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:37,521 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:37,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 02:51:37,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:51:37,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:37,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:51:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:51:37,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:51:37,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:37,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981449894] [2022-01-10 02:51:37,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981449894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:37,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:37,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:51:37,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61807683] [2022-01-10 02:51:37,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:37,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:51:37,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:37,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:51:37,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:51:37,678 INFO L87 Difference]: Start difference. First operand 72 states and 105 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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 02:51:37,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:37,975 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2022-01-10 02:51:37,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 02:51:37,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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 16 [2022-01-10 02:51:37,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:37,977 INFO L225 Difference]: With dead ends: 117 [2022-01-10 02:51:37,977 INFO L226 Difference]: Without dead ends: 100 [2022-01-10 02:51:37,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-01-10 02:51:37,978 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:37,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:51:37,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-10 02:51:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 76. [2022-01-10 02:51:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.4533333333333334) internal successors, (109), 75 states have internal predecessors, (109), 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 02:51:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 109 transitions. [2022-01-10 02:51:37,992 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 109 transitions. Word has length 16 [2022-01-10 02:51:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:37,992 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 109 transitions. [2022-01-10 02:51:37,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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 02:51:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 109 transitions. [2022-01-10 02:51:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 02:51:37,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:37,993 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:38,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:38,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:38,200 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:38,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:38,200 INFO L85 PathProgramCache]: Analyzing trace with hash 856936290, now seen corresponding path program 3 times [2022-01-10 02:51:38,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:38,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377140315] [2022-01-10 02:51:38,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:51:38,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:38,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:38,202 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:38,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 02:51:38,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 02:51:38,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:38,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:51:38,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:51:38,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:51:38,312 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:38,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377140315] [2022-01-10 02:51:38,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377140315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:38,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:38,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 02:51:38,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768402876] [2022-01-10 02:51:38,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:38,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:51:38,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:38,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:51:38,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:51:38,314 INFO L87 Difference]: Start difference. First operand 76 states and 109 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 02:51:38,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:38,381 INFO L93 Difference]: Finished difference Result 124 states and 178 transitions. [2022-01-10 02:51:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:51:38,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 17 [2022-01-10 02:51:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:38,383 INFO L225 Difference]: With dead ends: 124 [2022-01-10 02:51:38,383 INFO L226 Difference]: Without dead ends: 119 [2022-01-10 02:51:38,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:51:38,385 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:38,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 47 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:51:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-10 02:51:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 107. [2022-01-10 02:51:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.4622641509433962) internal successors, (155), 106 states have internal predecessors, (155), 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 02:51:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 155 transitions. [2022-01-10 02:51:38,418 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 155 transitions. Word has length 17 [2022-01-10 02:51:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:38,418 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 155 transitions. [2022-01-10 02:51:38,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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 02:51:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 155 transitions. [2022-01-10 02:51:38,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 02:51:38,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:38,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:38,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:38,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:38,631 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:38,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:38,632 INFO L85 PathProgramCache]: Analyzing trace with hash 796886620, now seen corresponding path program 4 times [2022-01-10 02:51:38,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:38,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236484915] [2022-01-10 02:51:38,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:51:38,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:38,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:38,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:38,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 02:51:38,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:51:38,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:38,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 02:51:38,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:38,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:39,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:39,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236484915] [2022-01-10 02:51:39,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236484915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:39,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:39,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-01-10 02:51:39,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319885195] [2022-01-10 02:51:39,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:39,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 02:51:39,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:39,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 02:51:39,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-01-10 02:51:39,277 INFO L87 Difference]: Start difference. First operand 107 states and 155 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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 02:51:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:39,735 INFO L93 Difference]: Finished difference Result 134 states and 184 transitions. [2022-01-10 02:51:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 02:51:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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 18 [2022-01-10 02:51:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:39,737 INFO L225 Difference]: With dead ends: 134 [2022-01-10 02:51:39,737 INFO L226 Difference]: Without dead ends: 101 [2022-01-10 02:51:39,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-01-10 02:51:39,738 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:39,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:51:39,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-10 02:51:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-01-10 02:51:39,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.4489795918367347) internal successors, (142), 98 states have internal predecessors, (142), 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 02:51:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2022-01-10 02:51:39,749 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 18 [2022-01-10 02:51:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:39,749 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2022-01-10 02:51:39,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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 02:51:39,749 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2022-01-10 02:51:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 02:51:39,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:39,750 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:39,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:39,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:39,958 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1793951343, now seen corresponding path program 5 times [2022-01-10 02:51:39,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:39,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278824574] [2022-01-10 02:51:39,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:51:39,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:39,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:39,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:39,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 02:51:39,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-10 02:51:39,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:39,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 02:51:39,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:51:40,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:51:40,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:40,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278824574] [2022-01-10 02:51:40,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278824574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:40,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:40,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-10 02:51:40,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884424205] [2022-01-10 02:51:40,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:40,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 02:51:40,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 02:51:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-01-10 02:51:40,241 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 02:51:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:41,530 INFO L93 Difference]: Finished difference Result 292 states and 479 transitions. [2022-01-10 02:51:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-10 02:51:41,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 19 [2022-01-10 02:51:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:41,532 INFO L225 Difference]: With dead ends: 292 [2022-01-10 02:51:41,532 INFO L226 Difference]: Without dead ends: 271 [2022-01-10 02:51:41,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1562 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1359, Invalid=3611, Unknown=0, NotChecked=0, Total=4970 [2022-01-10 02:51:41,535 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 206 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:41,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 146 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:51:41,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-10 02:51:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 130. [2022-01-10 02:51:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.4651162790697674) internal successors, (189), 129 states have internal predecessors, (189), 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 02:51:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 189 transitions. [2022-01-10 02:51:41,549 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 189 transitions. Word has length 19 [2022-01-10 02:51:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:41,550 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 189 transitions. [2022-01-10 02:51:41,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 02:51:41,550 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 189 transitions. [2022-01-10 02:51:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 02:51:41,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:41,551 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:41,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:41,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:41,752 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:41,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:41,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1979130930, now seen corresponding path program 6 times [2022-01-10 02:51:41,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:41,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938822588] [2022-01-10 02:51:41,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:51:41,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:41,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:41,754 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:41,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 02:51:41,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-10 02:51:41,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:41,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:51:41,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 02:51:41,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 02:51:41,971 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938822588] [2022-01-10 02:51:41,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938822588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:41,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:41,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:51:41,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107230920] [2022-01-10 02:51:41,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:41,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:51:41,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:41,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:51:41,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:51:41,973 INFO L87 Difference]: Start difference. First operand 130 states and 189 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 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 02:51:42,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:42,567 INFO L93 Difference]: Finished difference Result 228 states and 311 transitions. [2022-01-10 02:51:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-10 02:51:42,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 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 20 [2022-01-10 02:51:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:42,569 INFO L225 Difference]: With dead ends: 228 [2022-01-10 02:51:42,569 INFO L226 Difference]: Without dead ends: 201 [2022-01-10 02:51:42,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 02:51:42,570 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:42,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 60 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:51:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-10 02:51:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 136. [2022-01-10 02:51:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.4444444444444444) internal successors, (195), 135 states have internal predecessors, (195), 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 02:51:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 195 transitions. [2022-01-10 02:51:42,586 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 195 transitions. Word has length 20 [2022-01-10 02:51:42,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:42,586 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 195 transitions. [2022-01-10 02:51:42,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 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 02:51:42,587 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 195 transitions. [2022-01-10 02:51:42,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 02:51:42,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:42,587 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:42,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:42,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:42,796 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:42,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1459852754, now seen corresponding path program 7 times [2022-01-10 02:51:42,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:42,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [892370588] [2022-01-10 02:51:42,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:51:42,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:42,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:42,798 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:42,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 02:51:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:42,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:51:42,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 02:51:42,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 02:51:42,951 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:42,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [892370588] [2022-01-10 02:51:42,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [892370588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:42,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:42,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-01-10 02:51:42,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343284476] [2022-01-10 02:51:42,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:42,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:51:42,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:42,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:51:42,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:51:42,953 INFO L87 Difference]: Start difference. First operand 136 states and 195 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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 02:51:43,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:43,075 INFO L93 Difference]: Finished difference Result 202 states and 291 transitions. [2022-01-10 02:51:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 02:51:43,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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 21 [2022-01-10 02:51:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:43,076 INFO L225 Difference]: With dead ends: 202 [2022-01-10 02:51:43,076 INFO L226 Difference]: Without dead ends: 197 [2022-01-10 02:51:43,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:51:43,077 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:43,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 91 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:51:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-10 02:51:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 179. [2022-01-10 02:51:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.4606741573033708) internal successors, (260), 178 states have internal predecessors, (260), 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 02:51:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 260 transitions. [2022-01-10 02:51:43,095 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 260 transitions. Word has length 21 [2022-01-10 02:51:43,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:43,095 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 260 transitions. [2022-01-10 02:51:43,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 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 02:51:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 260 transitions. [2022-01-10 02:51:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 02:51:43,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:43,097 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:43,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:43,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:43,303 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:43,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:43,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1987539476, now seen corresponding path program 8 times [2022-01-10 02:51:43,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:43,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313622065] [2022-01-10 02:51:43,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:51:43,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:43,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:43,305 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:43,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 02:51:43,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:51:43,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:43,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 02:51:43,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:51:43,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:51:44,003 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:44,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313622065] [2022-01-10 02:51:44,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313622065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:44,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:44,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-01-10 02:51:44,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495527077] [2022-01-10 02:51:44,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:44,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 02:51:44,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:44,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 02:51:44,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-01-10 02:51:44,004 INFO L87 Difference]: Start difference. First operand 179 states and 260 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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 02:51:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:44,655 INFO L93 Difference]: Finished difference Result 235 states and 319 transitions. [2022-01-10 02:51:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-10 02:51:44,655 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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 22 [2022-01-10 02:51:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:44,656 INFO L225 Difference]: With dead ends: 235 [2022-01-10 02:51:44,656 INFO L226 Difference]: Without dead ends: 223 [2022-01-10 02:51:44,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2022-01-10 02:51:44,658 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 105 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:44,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 203 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:51:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-10 02:51:44,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 194. [2022-01-10 02:51:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.4352331606217616) internal successors, (277), 193 states have internal predecessors, (277), 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 02:51:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 277 transitions. [2022-01-10 02:51:44,678 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 277 transitions. Word has length 22 [2022-01-10 02:51:44,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:44,678 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 277 transitions. [2022-01-10 02:51:44,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 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 02:51:44,678 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 277 transitions. [2022-01-10 02:51:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 02:51:44,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:44,680 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:44,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:44,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:44,889 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1562904434, now seen corresponding path program 2 times [2022-01-10 02:51:44,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:44,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85817698] [2022-01-10 02:51:44,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:51:44,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:44,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:44,891 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:44,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 02:51:44,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:51:44,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:44,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:51:44,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 02:51:45,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 02:51:45,061 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:45,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85817698] [2022-01-10 02:51:45,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85817698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:45,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:45,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2022-01-10 02:51:45,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262610814] [2022-01-10 02:51:45,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:45,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:51:45,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:45,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:51:45,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:51:45,064 INFO L87 Difference]: Start difference. First operand 194 states and 277 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 02:51:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:45,222 INFO L93 Difference]: Finished difference Result 339 states and 468 transitions. [2022-01-10 02:51:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 02:51:45,223 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 22 [2022-01-10 02:51:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:45,224 INFO L225 Difference]: With dead ends: 339 [2022-01-10 02:51:45,224 INFO L226 Difference]: Without dead ends: 303 [2022-01-10 02:51:45,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-10 02:51:45,225 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:45,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 137 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:51:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-10 02:51:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 169. [2022-01-10 02:51:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.4583333333333333) internal successors, (245), 168 states have internal predecessors, (245), 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 02:51:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 245 transitions. [2022-01-10 02:51:45,253 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 245 transitions. Word has length 22 [2022-01-10 02:51:45,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:45,253 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 245 transitions. [2022-01-10 02:51:45,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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 02:51:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 245 transitions. [2022-01-10 02:51:45,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 02:51:45,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:45,254 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:45,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:45,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:45,463 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1236870529, now seen corresponding path program 3 times [2022-01-10 02:51:45,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:45,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883654035] [2022-01-10 02:51:45,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:51:45,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:45,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:45,465 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:45,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 02:51:45,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-10 02:51:45,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:45,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 02:51:45,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:45,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:45,987 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:45,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883654035] [2022-01-10 02:51:45,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883654035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:45,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:45,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-01-10 02:51:45,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862181809] [2022-01-10 02:51:45,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:45,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 02:51:45,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:45,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 02:51:45,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2022-01-10 02:51:45,988 INFO L87 Difference]: Start difference. First operand 169 states and 245 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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 02:51:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:48,031 INFO L93 Difference]: Finished difference Result 723 states and 1251 transitions. [2022-01-10 02:51:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-10 02:51:48,032 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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 23 [2022-01-10 02:51:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:48,034 INFO L225 Difference]: With dead ends: 723 [2022-01-10 02:51:48,034 INFO L226 Difference]: Without dead ends: 699 [2022-01-10 02:51:48,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2096, Invalid=4546, Unknown=0, NotChecked=0, Total=6642 [2022-01-10 02:51:48,037 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 641 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:48,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 388 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 02:51:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-10 02:51:48,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 265. [2022-01-10 02:51:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.4507575757575757) internal successors, (383), 264 states have internal predecessors, (383), 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 02:51:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 383 transitions. [2022-01-10 02:51:48,075 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 383 transitions. Word has length 23 [2022-01-10 02:51:48,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:48,075 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 383 transitions. [2022-01-10 02:51:48,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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 02:51:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 383 transitions. [2022-01-10 02:51:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 02:51:48,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:48,076 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:48,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:48,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:48,283 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:48,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:48,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1627500540, now seen corresponding path program 9 times [2022-01-10 02:51:48,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:48,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060446632] [2022-01-10 02:51:48,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:51:48,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:48,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:48,285 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:48,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 02:51:48,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 02:51:48,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 02:51:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:51:48,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:51:48,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:48,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060446632] [2022-01-10 02:51:48,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060446632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:48,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:48,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-10 02:51:48,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248157164] [2022-01-10 02:51:48,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:48,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 02:51:48,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:48,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 02:51:48,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-10 02:51:48,535 INFO L87 Difference]: Start difference. First operand 265 states and 383 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 02:51:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:49,597 INFO L93 Difference]: Finished difference Result 527 states and 680 transitions. [2022-01-10 02:51:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-10 02:51:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 24 [2022-01-10 02:51:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:49,599 INFO L225 Difference]: With dead ends: 527 [2022-01-10 02:51:49,599 INFO L226 Difference]: Without dead ends: 478 [2022-01-10 02:51:49,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=929, Invalid=3901, Unknown=0, NotChecked=0, Total=4830 [2022-01-10 02:51:49,601 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:49,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 165 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:51:49,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-01-10 02:51:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 265. [2022-01-10 02:51:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.4166666666666667) internal successors, (374), 264 states have internal predecessors, (374), 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 02:51:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 374 transitions. [2022-01-10 02:51:49,632 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 374 transitions. Word has length 24 [2022-01-10 02:51:49,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:49,632 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 374 transitions. [2022-01-10 02:51:49,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 02:51:49,632 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 374 transitions. [2022-01-10 02:51:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 02:51:49,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:49,633 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:49,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:49,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:49,842 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:49,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1216056930, now seen corresponding path program 10 times [2022-01-10 02:51:49,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:49,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244495982] [2022-01-10 02:51:49,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:51:49,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:49,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:49,843 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:49,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 02:51:49,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:51:49,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:49,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:51:49,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 02:51:49,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 02:51:50,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:50,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244495982] [2022-01-10 02:51:50,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244495982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:50,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:50,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:51:50,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052281753] [2022-01-10 02:51:50,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:50,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:51:50,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:50,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:51:50,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:51:50,048 INFO L87 Difference]: Start difference. First operand 265 states and 374 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 02:51:50,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:50,216 INFO L93 Difference]: Finished difference Result 355 states and 501 transitions. [2022-01-10 02:51:50,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 02:51:50,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 25 [2022-01-10 02:51:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:50,221 INFO L225 Difference]: With dead ends: 355 [2022-01-10 02:51:50,221 INFO L226 Difference]: Without dead ends: 350 [2022-01-10 02:51:50,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-01-10 02:51:50,222 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 90 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:50,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 96 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:51:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-10 02:51:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 326. [2022-01-10 02:51:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.4276923076923076) internal successors, (464), 325 states have internal predecessors, (464), 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 02:51:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 464 transitions. [2022-01-10 02:51:50,263 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 464 transitions. Word has length 25 [2022-01-10 02:51:50,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:50,264 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 464 transitions. [2022-01-10 02:51:50,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 02:51:50,264 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 464 transitions. [2022-01-10 02:51:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 02:51:50,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:50,265 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:50,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:50,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:50,473 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:50,474 INFO L85 PathProgramCache]: Analyzing trace with hash -955275428, now seen corresponding path program 11 times [2022-01-10 02:51:50,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:50,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149800292] [2022-01-10 02:51:50,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:51:50,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:50,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:50,476 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:50,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 02:51:50,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-10 02:51:50,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:50,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 02:51:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:50,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:51,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:51,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149800292] [2022-01-10 02:51:51,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149800292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:51,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:51,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-01-10 02:51:51,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659443013] [2022-01-10 02:51:51,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:51,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 02:51:51,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:51,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 02:51:51,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:51:51,488 INFO L87 Difference]: Start difference. First operand 326 states and 464 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 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 02:51:52,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:52,296 INFO L93 Difference]: Finished difference Result 367 states and 511 transitions. [2022-01-10 02:51:52,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 02:51:52,297 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 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 26 [2022-01-10 02:51:52,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:52,298 INFO L225 Difference]: With dead ends: 367 [2022-01-10 02:51:52,298 INFO L226 Difference]: Without dead ends: 316 [2022-01-10 02:51:52,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=180, Invalid=1800, Unknown=0, NotChecked=0, Total=1980 [2022-01-10 02:51:52,299 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:52,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 109 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:51:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-10 02:51:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2022-01-10 02:51:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.428115015974441) internal successors, (447), 313 states have internal predecessors, (447), 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 02:51:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 447 transitions. [2022-01-10 02:51:52,339 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 447 transitions. Word has length 26 [2022-01-10 02:51:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:52,339 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 447 transitions. [2022-01-10 02:51:52,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 34 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 02:51:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 447 transitions. [2022-01-10 02:51:52,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 02:51:52,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:52,340 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:52,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:52,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:52,549 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:52,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:52,549 INFO L85 PathProgramCache]: Analyzing trace with hash 541784658, now seen corresponding path program 3 times [2022-01-10 02:51:52,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:52,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868696568] [2022-01-10 02:51:52,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:51:52,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:52,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:52,551 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:52,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 02:51:52,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 02:51:52,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:52,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 02:51:52,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:51:52,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:51:53,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:53,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868696568] [2022-01-10 02:51:53,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868696568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:53,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:53,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-01-10 02:51:53,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814851663] [2022-01-10 02:51:53,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:53,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-10 02:51:53,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:53,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-10 02:51:53,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2022-01-10 02:51:53,103 INFO L87 Difference]: Start difference. First operand 314 states and 447 transitions. Second operand has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 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 02:51:54,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:54,261 INFO L93 Difference]: Finished difference Result 865 states and 1083 transitions. [2022-01-10 02:51:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-10 02:51:54,261 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 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 27 [2022-01-10 02:51:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:54,263 INFO L225 Difference]: With dead ends: 865 [2022-01-10 02:51:54,263 INFO L226 Difference]: Without dead ends: 681 [2022-01-10 02:51:54,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1026, Invalid=3944, Unknown=0, NotChecked=0, Total=4970 [2022-01-10 02:51:54,266 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:54,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 123 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 02:51:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-10 02:51:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 367. [2022-01-10 02:51:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.2950819672131149) internal successors, (474), 366 states have internal predecessors, (474), 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 02:51:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 474 transitions. [2022-01-10 02:51:54,318 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 474 transitions. Word has length 27 [2022-01-10 02:51:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:54,318 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 474 transitions. [2022-01-10 02:51:54,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 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 02:51:54,319 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 474 transitions. [2022-01-10 02:51:54,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 02:51:54,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:54,320 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:54,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:54,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:51:54,528 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1509115665, now seen corresponding path program 12 times [2022-01-10 02:51:54,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:54,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296799866] [2022-01-10 02:51:54,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:51:54,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:54,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:54,530 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:51:54,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 02:51:54,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-10 02:51:54,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:54,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 02:51:54,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:51:54,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:51:55,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:55,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296799866] [2022-01-10 02:51:55,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296799866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:55,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:55,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-01-10 02:51:55,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288449091] [2022-01-10 02:51:55,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:55,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-10 02:51:55,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:55,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-10 02:51:55,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 02:51:55,123 INFO L87 Difference]: Start difference. First operand 367 states and 474 transitions. Second operand has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 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 02:51:59,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:59,846 INFO L93 Difference]: Finished difference Result 1485 states and 1919 transitions. [2022-01-10 02:51:59,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-10 02:51:59,863 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 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 27 [2022-01-10 02:51:59,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:59,869 INFO L225 Difference]: With dead ends: 1485 [2022-01-10 02:51:59,869 INFO L226 Difference]: Without dead ends: 1414 [2022-01-10 02:51:59,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8751 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=6441, Invalid=16815, Unknown=0, NotChecked=0, Total=23256 [2022-01-10 02:51:59,876 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 738 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 939 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 939 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:59,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 500 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [939 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 02:51:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2022-01-10 02:51:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 389. [2022-01-10 02:51:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.3015463917525774) internal successors, (505), 388 states have internal predecessors, (505), 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 02:51:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 505 transitions. [2022-01-10 02:51:59,942 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 505 transitions. Word has length 27 [2022-01-10 02:51:59,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:59,943 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 505 transitions. [2022-01-10 02:51:59,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 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 02:51:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 505 transitions. [2022-01-10 02:51:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 02:51:59,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:59,944 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:51:59,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:00,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:00,153 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:00,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:00,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1475352914, now seen corresponding path program 13 times [2022-01-10 02:52:00,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:00,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11442226] [2022-01-10 02:52:00,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:52:00,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:00,155 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:00,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 02:52:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:00,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 02:52:00,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 02:52:00,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 02:52:00,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:00,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11442226] [2022-01-10 02:52:00,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11442226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:00,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:00,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 02:52:00,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186500560] [2022-01-10 02:52:00,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:00,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:52:00,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:00,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:52:00,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:52:00,352 INFO L87 Difference]: Start difference. First operand 389 states and 505 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 02:52:00,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:00,612 INFO L93 Difference]: Finished difference Result 500 states and 652 transitions. [2022-01-10 02:52:00,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 02:52:00,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 29 [2022-01-10 02:52:00,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:00,613 INFO L225 Difference]: With dead ends: 500 [2022-01-10 02:52:00,613 INFO L226 Difference]: Without dead ends: 495 [2022-01-10 02:52:00,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2022-01-10 02:52:00,614 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 117 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:00,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 102 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:00,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-01-10 02:52:00,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 458. [2022-01-10 02:52:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.312910284463895) internal successors, (600), 457 states have internal predecessors, (600), 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 02:52:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 600 transitions. [2022-01-10 02:52:00,675 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 600 transitions. Word has length 29 [2022-01-10 02:52:00,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:00,675 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 600 transitions. [2022-01-10 02:52:00,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 02:52:00,676 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 600 transitions. [2022-01-10 02:52:00,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 02:52:00,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:00,677 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:00,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-01-10 02:52:00,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:00,885 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:00,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:00,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1507034516, now seen corresponding path program 14 times [2022-01-10 02:52:00,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:00,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134081504] [2022-01-10 02:52:00,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:00,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:00,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:00,887 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:00,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 02:52:00,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:00,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:00,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 02:52:00,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:52:01,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:52:01,975 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:01,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134081504] [2022-01-10 02:52:01,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134081504] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:01,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:01,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-01-10 02:52:01,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236384422] [2022-01-10 02:52:01,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:01,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-10 02:52:01,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:01,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-10 02:52:01,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 02:52:01,977 INFO L87 Difference]: Start difference. First operand 458 states and 600 transitions. Second operand has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 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 02:52:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:03,026 INFO L93 Difference]: Finished difference Result 489 states and 630 transitions. [2022-01-10 02:52:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-10 02:52:03,026 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 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 30 [2022-01-10 02:52:03,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:03,028 INFO L225 Difference]: With dead ends: 489 [2022-01-10 02:52:03,028 INFO L226 Difference]: Without dead ends: 466 [2022-01-10 02:52:03,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=818, Invalid=3738, Unknown=0, NotChecked=0, Total=4556 [2022-01-10 02:52:03,029 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:03,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 165 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:52:03,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-10 02:52:03,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 451. [2022-01-10 02:52:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.3155555555555556) internal successors, (592), 450 states have internal predecessors, (592), 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 02:52:03,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 592 transitions. [2022-01-10 02:52:03,084 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 592 transitions. Word has length 30 [2022-01-10 02:52:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:03,084 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 592 transitions. [2022-01-10 02:52:03,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 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 02:52:03,084 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 592 transitions. [2022-01-10 02:52:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 02:52:03,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:03,085 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:03,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-01-10 02:52:03,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:03,286 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:03,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:03,286 INFO L85 PathProgramCache]: Analyzing trace with hash -366435620, now seen corresponding path program 4 times [2022-01-10 02:52:03,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:03,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712345163] [2022-01-10 02:52:03,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:52:03,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:03,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:03,288 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:03,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 02:52:03,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:52:03,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:03,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 02:52:03,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 02:52:03,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 02:52:03,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:03,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712345163] [2022-01-10 02:52:03,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712345163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:03,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:03,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2022-01-10 02:52:03,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086469531] [2022-01-10 02:52:03,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:03,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:52:03,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:03,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:52:03,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:52:03,554 INFO L87 Difference]: Start difference. First operand 451 states and 592 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 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 02:52:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:03,985 INFO L93 Difference]: Finished difference Result 942 states and 1102 transitions. [2022-01-10 02:52:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-10 02:52:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 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 30 [2022-01-10 02:52:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:03,988 INFO L225 Difference]: With dead ends: 942 [2022-01-10 02:52:03,988 INFO L226 Difference]: Without dead ends: 882 [2022-01-10 02:52:03,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 02:52:03,989 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:03,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 241 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:52:03,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-01-10 02:52:04,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 445. [2022-01-10 02:52:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.3063063063063063) internal successors, (580), 444 states have internal predecessors, (580), 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 02:52:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 580 transitions. [2022-01-10 02:52:04,056 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 580 transitions. Word has length 30 [2022-01-10 02:52:04,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:04,056 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 580 transitions. [2022-01-10 02:52:04,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 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 02:52:04,057 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 580 transitions. [2022-01-10 02:52:04,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 02:52:04,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:04,058 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:04,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-01-10 02:52:04,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:04,267 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:04,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:04,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1397313151, now seen corresponding path program 15 times [2022-01-10 02:52:04,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:04,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678401569] [2022-01-10 02:52:04,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:52:04,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:04,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:04,268 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:04,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 02:52:04,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-10 02:52:04,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:04,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 02:52:04,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:52:04,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:52:04,961 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:04,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678401569] [2022-01-10 02:52:04,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678401569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:04,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:04,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-01-10 02:52:04,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810701929] [2022-01-10 02:52:04,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:04,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-10 02:52:04,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:04,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-10 02:52:04,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 02:52:04,963 INFO L87 Difference]: Start difference. First operand 445 states and 580 transitions. Second operand has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 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 02:52:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:12,605 INFO L93 Difference]: Finished difference Result 1836 states and 2354 transitions. [2022-01-10 02:52:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-01-10 02:52:12,605 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 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 31 [2022-01-10 02:52:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:12,608 INFO L225 Difference]: With dead ends: 1836 [2022-01-10 02:52:12,608 INFO L226 Difference]: Without dead ends: 1710 [2022-01-10 02:52:12,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18539 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=11171, Invalid=35269, Unknown=0, NotChecked=0, Total=46440 [2022-01-10 02:52:12,612 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 945 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 1581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1581 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:12,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 517 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1581 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 02:52:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-01-10 02:52:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 456. [2022-01-10 02:52:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.30989010989011) internal successors, (596), 455 states have internal predecessors, (596), 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 02:52:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 596 transitions. [2022-01-10 02:52:12,704 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 596 transitions. Word has length 31 [2022-01-10 02:52:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:12,704 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 596 transitions. [2022-01-10 02:52:12,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 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 02:52:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 596 transitions. [2022-01-10 02:52:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 02:52:12,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:12,705 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:12,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-01-10 02:52:12,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:12,916 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:12,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2092779762, now seen corresponding path program 5 times [2022-01-10 02:52:12,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:12,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481516768] [2022-01-10 02:52:12,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:52:12,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:12,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:12,918 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:12,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 02:52:12,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-10 02:52:12,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:12,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 02:52:12,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 02:52:13,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 02:52:13,539 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:13,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481516768] [2022-01-10 02:52:13,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481516768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:13,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:13,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-01-10 02:52:13,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776498044] [2022-01-10 02:52:13,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:13,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-10 02:52:13,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-10 02:52:13,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 02:52:13,541 INFO L87 Difference]: Start difference. First operand 456 states and 596 transitions. Second operand has 36 states, 36 states have (on average 1.25) internal successors, (45), 36 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 02:52:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:18,426 INFO L93 Difference]: Finished difference Result 1387 states and 1752 transitions. [2022-01-10 02:52:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-01-10 02:52:18,426 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.25) internal successors, (45), 36 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 32 [2022-01-10 02:52:18,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:18,429 INFO L225 Difference]: With dead ends: 1387 [2022-01-10 02:52:18,429 INFO L226 Difference]: Without dead ends: 1257 [2022-01-10 02:52:18,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14671 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5356, Invalid=36874, Unknown=0, NotChecked=0, Total=42230 [2022-01-10 02:52:18,433 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 604 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 1118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1118 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:18,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 537 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1118 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 02:52:18,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-01-10 02:52:18,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 444. [2022-01-10 02:52:18,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.2595936794582392) internal successors, (558), 443 states have internal predecessors, (558), 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 02:52:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 558 transitions. [2022-01-10 02:52:18,546 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 558 transitions. Word has length 32 [2022-01-10 02:52:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:18,546 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 558 transitions. [2022-01-10 02:52:18,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.25) internal successors, (45), 36 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 02:52:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 558 transitions. [2022-01-10 02:52:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 02:52:18,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:18,547 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:18,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:18,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:18,757 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:18,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:18,757 INFO L85 PathProgramCache]: Analyzing trace with hash 240430434, now seen corresponding path program 16 times [2022-01-10 02:52:18,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:18,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201285226] [2022-01-10 02:52:18,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:52:18,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:18,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:18,758 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:18,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 02:52:18,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:52:18,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:18,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 02:52:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 02:52:18,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 02:52:19,012 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:19,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201285226] [2022-01-10 02:52:19,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201285226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:19,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:19,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:52:19,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101830974] [2022-01-10 02:52:19,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:19,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:52:19,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:19,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:52:19,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:52:19,015 INFO L87 Difference]: Start difference. First operand 444 states and 558 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 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 02:52:19,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:19,424 INFO L93 Difference]: Finished difference Result 560 states and 710 transitions. [2022-01-10 02:52:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 02:52:19,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 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 33 [2022-01-10 02:52:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:19,426 INFO L225 Difference]: With dead ends: 560 [2022-01-10 02:52:19,426 INFO L226 Difference]: Without dead ends: 555 [2022-01-10 02:52:19,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=970, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 02:52:19,427 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:19,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 157 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-10 02:52:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 529. [2022-01-10 02:52:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.2670454545454546) internal successors, (669), 528 states have internal predecessors, (669), 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 02:52:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 669 transitions. [2022-01-10 02:52:19,498 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 669 transitions. Word has length 33 [2022-01-10 02:52:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:19,498 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 669 transitions. [2022-01-10 02:52:19,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 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 02:52:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 669 transitions. [2022-01-10 02:52:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 02:52:19,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:19,499 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:19,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-01-10 02:52:19,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:19,699 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1134925732, now seen corresponding path program 17 times [2022-01-10 02:52:19,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:19,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418893291] [2022-01-10 02:52:19,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:52:19,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:19,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:19,701 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:19,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 02:52:19,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-10 02:52:19,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:19,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 02:52:19,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 02:52:20,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 02:52:21,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:21,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418893291] [2022-01-10 02:52:21,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418893291] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:21,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:21,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-01-10 02:52:21,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404661792] [2022-01-10 02:52:21,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:21,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-10 02:52:21,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:21,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-10 02:52:21,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1828, Unknown=0, NotChecked=0, Total=2070 [2022-01-10 02:52:21,019 INFO L87 Difference]: Start difference. First operand 529 states and 669 transitions. Second operand has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 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 02:52:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:22,544 INFO L93 Difference]: Finished difference Result 568 states and 707 transitions. [2022-01-10 02:52:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-10 02:52:22,544 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 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) Word has length 34 [2022-01-10 02:52:22,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:22,545 INFO L225 Difference]: With dead ends: 568 [2022-01-10 02:52:22,545 INFO L226 Difference]: Without dead ends: 542 [2022-01-10 02:52:22,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1214, Invalid=5428, Unknown=0, NotChecked=0, Total=6642 [2022-01-10 02:52:22,546 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 94 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:22,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 190 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 02:52:22,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-10 02:52:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 521. [2022-01-10 02:52:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.2692307692307692) internal successors, (660), 520 states have internal predecessors, (660), 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 02:52:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 660 transitions. [2022-01-10 02:52:22,634 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 660 transitions. Word has length 34 [2022-01-10 02:52:22,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:22,634 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 660 transitions. [2022-01-10 02:52:22,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 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 02:52:22,635 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 660 transitions. [2022-01-10 02:52:22,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 02:52:22,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:22,636 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:22,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:22,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:22,845 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:22,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1184728514, now seen corresponding path program 6 times [2022-01-10 02:52:22,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:22,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689441494] [2022-01-10 02:52:22,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:52:22,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:22,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:22,847 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:22,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 02:52:22,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-10 02:52:22,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:22,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 02:52:22,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 02:52:23,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 02:52:23,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:23,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689441494] [2022-01-10 02:52:23,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689441494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:23,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:23,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-01-10 02:52:23,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107292544] [2022-01-10 02:52:23,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:23,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-10 02:52:23,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-10 02:52:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 02:52:23,527 INFO L87 Difference]: Start difference. First operand 521 states and 660 transitions. Second operand has 40 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 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 02:52:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:30,218 INFO L93 Difference]: Finished difference Result 1860 states and 2418 transitions. [2022-01-10 02:52:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-01-10 02:52:30,219 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 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 35 [2022-01-10 02:52:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:30,222 INFO L225 Difference]: With dead ends: 1860 [2022-01-10 02:52:30,222 INFO L226 Difference]: Without dead ends: 1676 [2022-01-10 02:52:30,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21615 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=7390, Invalid=52880, Unknown=0, NotChecked=0, Total=60270 [2022-01-10 02:52:30,226 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1070 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 1756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1756 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:30,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1070 Valid, 491 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1756 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 02:52:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2022-01-10 02:52:30,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 523. [2022-01-10 02:52:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.2547892720306513) internal successors, (655), 522 states have internal predecessors, (655), 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 02:52:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 655 transitions. [2022-01-10 02:52:30,360 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 655 transitions. Word has length 35 [2022-01-10 02:52:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:30,360 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 655 transitions. [2022-01-10 02:52:30,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 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 02:52:30,360 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 655 transitions. [2022-01-10 02:52:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 02:52:30,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:30,361 INFO L514 BasicCegarLoop]: trace histogram [16, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:30,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:30,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:52:30,571 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:30,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:30,571 INFO L85 PathProgramCache]: Analyzing trace with hash -214196591, now seen corresponding path program 18 times [2022-01-10 02:52:30,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:30,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919017725] [2022-01-10 02:52:30,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:52:30,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:30,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:30,572 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:52:30,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 02:52:30,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-10 02:52:30,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:30,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 02:52:30,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 02:52:30,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 02:52:31,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:31,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919017725] [2022-01-10 02:52:31,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919017725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:31,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:31,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-01-10 02:52:31,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753498215] [2022-01-10 02:52:31,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:31,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-10 02:52:31,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-10 02:52:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1506, Unknown=0, NotChecked=0, Total=1892 [2022-01-10 02:52:31,392 INFO L87 Difference]: Start difference. First operand 523 states and 655 transitions. Second operand has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 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)