/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/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:52:40,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:52:40,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:52:41,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:52:41,059 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 02:52:41,091 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:52:41,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:52:41,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:52:41,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:52:41,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:52:41,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:52:41,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:52:41,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:52:41,093 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:52:41,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:52:41,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:52:41,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:52:41,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:52:41,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:52:41,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:52:41,096 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:52:41,096 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:52:41,096 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:52:41,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:52:41,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:52:41,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:52:41,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:52:41,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:52:41,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:52:41,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:52:41,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:52:41,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:52:41,098 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:52:41,098 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:52:41,098 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:52:41,098 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:52:41,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:52:41,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:52:41,099 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:52:41,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:52:41,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:52:41,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:52:41,333 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:52:41,335 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:52:41,336 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-01-10 02:52:41,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca09cebe0/b8029855125a4d1f9ff4c3c22a8fd48e/FLAG9dcc0c618 [2022-01-10 02:52:41,728 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:52:41,728 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-01-10 02:52:41,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca09cebe0/b8029855125a4d1f9ff4c3c22a8fd48e/FLAG9dcc0c618 [2022-01-10 02:52:42,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca09cebe0/b8029855125a4d1f9ff4c3c22a8fd48e [2022-01-10 02:52:42,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:52:42,167 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:52:42,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:52:42,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:52:42,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:52:42,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:52:42" (1/1) ... [2022-01-10 02:52:42,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f9a98d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42, skipping insertion in model container [2022-01-10 02:52:42,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:52:42" (1/1) ... [2022-01-10 02:52:42,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:52:42,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:52:42,328 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/mono-crafted_6.c[318,331] [2022-01-10 02:52:42,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:52:42,366 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:52:42,379 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/mono-crafted_6.c[318,331] [2022-01-10 02:52:42,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:52:42,395 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:52:42,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42 WrapperNode [2022-01-10 02:52:42,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:52:42,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:52:42,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:52:42,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:52:42,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42" (1/1) ... [2022-01-10 02:52:42,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42" (1/1) ... [2022-01-10 02:52:42,435 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-01-10 02:52:42,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:52:42,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:52:42,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:52:42,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:52:42,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42" (1/1) ... [2022-01-10 02:52:42,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42" (1/1) ... [2022-01-10 02:52:42,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42" (1/1) ... [2022-01-10 02:52:42,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42" (1/1) ... [2022-01-10 02:52:42,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42" (1/1) ... [2022-01-10 02:52:42,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42" (1/1) ... [2022-01-10 02:52:42,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42" (1/1) ... [2022-01-10 02:52:42,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:52:42,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:52:42,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:52:42,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:52:42,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42" (1/1) ... [2022-01-10 02:52:42,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:52:42,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:52:42,500 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 02:52:42,515 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 02:52:42,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:52:42,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:52:42,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:52:42,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:52:42,585 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:52:42,586 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:52:42,665 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:52:42,671 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:52:42,672 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 02:52:42,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:52:42 BoogieIcfgContainer [2022-01-10 02:52:42,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:52:42,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:52:42,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:52:42,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:52:42,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:52:42" (1/3) ... [2022-01-10 02:52:42,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e388df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:52:42, skipping insertion in model container [2022-01-10 02:52:42,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:42" (2/3) ... [2022-01-10 02:52:42,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e388df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:52:42, skipping insertion in model container [2022-01-10 02:52:42,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:52:42" (3/3) ... [2022-01-10 02:52:42,680 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2022-01-10 02:52:42,684 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:52:42,684 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:52:42,725 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:52:42,731 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 02:52:42,731 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:52:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 02:52:42,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 02:52:42,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:42,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 02:52:42,745 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:42,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:42,750 INFO L85 PathProgramCache]: Analyzing trace with hash 889646744, now seen corresponding path program 1 times [2022-01-10 02:52:42,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:42,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678997527] [2022-01-10 02:52:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:42,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:42,767 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 02:52:42,780 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 02:52:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:42,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:52:42,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:42,923 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 02:52:42,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:52:42,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:42,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678997527] [2022-01-10 02:52:42,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678997527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:52:42,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:52:42,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:52:42,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210848445] [2022-01-10 02:52:42,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:52:42,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:52:42,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:42,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:52:42,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:52:42,955 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:52:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:43,010 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2022-01-10 02:52:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:52:43,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-01-10 02:52:43,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:43,021 INFO L225 Difference]: With dead ends: 28 [2022-01-10 02:52:43,022 INFO L226 Difference]: Without dead ends: 12 [2022-01-10 02:52:43,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:52:43,028 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:43,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-10 02:52:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-01-10 02:52:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 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 02:52:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-01-10 02:52:43,056 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2022-01-10 02:52:43,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:43,056 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-01-10 02:52:43,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:52:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-01-10 02:52:43,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 02:52:43,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:43,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:43,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 02:52:43,265 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 02:52:43,266 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:43,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:43,266 INFO L85 PathProgramCache]: Analyzing trace with hash 295698875, now seen corresponding path program 1 times [2022-01-10 02:52:43,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:43,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971706287] [2022-01-10 02:52:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:43,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:43,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:43,270 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 02:52:43,272 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 02:52:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:43,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:52:43,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:43,328 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 02:52:43,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:43,367 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 02:52:43,367 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:43,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971706287] [2022-01-10 02:52:43,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971706287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:43,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:43,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:52:43,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063579732] [2022-01-10 02:52:43,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:43,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:52:43,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:43,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:52:43,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:52:43,370 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 02:52:43,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:43,428 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2022-01-10 02:52:43,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:52:43,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 8 [2022-01-10 02:52:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:43,430 INFO L225 Difference]: With dead ends: 26 [2022-01-10 02:52:43,430 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 02:52:43,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:52:43,432 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:43,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 20 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:43,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 02:52:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-01-10 02:52:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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 02:52:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-01-10 02:52:43,437 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-01-10 02:52:43,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:43,438 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-01-10 02:52:43,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 02:52:43,438 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-01-10 02:52:43,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 02:52:43,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:43,440 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:43,449 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 02:52:43,648 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 02:52:43,649 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:43,650 INFO L85 PathProgramCache]: Analyzing trace with hash 890916581, now seen corresponding path program 1 times [2022-01-10 02:52:43,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:43,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536161053] [2022-01-10 02:52:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:43,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:43,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:43,652 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 02:52:43,657 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 02:52:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:43,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:52:43,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:43,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:43,841 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:43,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536161053] [2022-01-10 02:52:43,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536161053] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:43,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:43,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 02:52:43,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866249696] [2022-01-10 02:52:43,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:43,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:52:43,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:52:43,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:52:43,843 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 02:52:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:43,953 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-01-10 02:52:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 02:52:43,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 02:52:43,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:43,955 INFO L225 Difference]: With dead ends: 34 [2022-01-10 02:52:43,956 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 02:52:43,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:52:43,957 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:43,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 02:52:43,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 02:52:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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 02:52:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-10 02:52:43,966 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2022-01-10 02:52:43,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:43,966 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-10 02:52:43,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 02:52:43,967 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-10 02:52:43,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 02:52:43,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:43,968 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:43,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:44,168 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 02:52:44,169 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:44,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:44,169 INFO L85 PathProgramCache]: Analyzing trace with hash -882433295, now seen corresponding path program 2 times [2022-01-10 02:52:44,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:44,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982731630] [2022-01-10 02:52:44,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:44,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:44,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:44,171 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 02:52:44,172 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 02:52:44,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:44,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:44,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:52:44,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:44,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:44,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:44,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982731630] [2022-01-10 02:52:44,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982731630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:44,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:44,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:52:44,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550530439] [2022-01-10 02:52:44,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:44,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:52:44,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:44,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:52:44,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:52:44,527 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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 02:52:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:44,908 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2022-01-10 02:52:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 02:52:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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 02:52:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:44,910 INFO L225 Difference]: With dead ends: 50 [2022-01-10 02:52:44,910 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 02:52:44,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2022-01-10 02:52:44,912 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:44,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 02:52:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-10 02:52:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 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 02:52:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-01-10 02:52:44,924 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 22 [2022-01-10 02:52:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:44,925 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-01-10 02:52:44,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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 02:52:44,925 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-01-10 02:52:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 02:52:44,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:44,927 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:44,940 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 02:52:45,135 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 02:52:45,136 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:45,136 INFO L85 PathProgramCache]: Analyzing trace with hash -420452599, now seen corresponding path program 3 times [2022-01-10 02:52:45,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:45,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990203999] [2022-01-10 02:52:45,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:52:45,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:45,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:45,139 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 02:52:45,139 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 02:52:45,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 02:52:45,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:45,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:52:45,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-01-10 02:52:45,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:52:45,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990203999] [2022-01-10 02:52:45,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990203999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:52:45,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:52:45,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:52:45,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727176873] [2022-01-10 02:52:45,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:52:45,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:52:45,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:45,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:52:45,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:52:45,276 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 02:52:45,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:45,311 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-01-10 02:52:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:52:45,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 38 [2022-01-10 02:52:45,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:45,313 INFO L225 Difference]: With dead ends: 53 [2022-01-10 02:52:45,313 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 02:52:45,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:52:45,314 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:45,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 02:52:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-10 02:52:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 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 02:52:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-01-10 02:52:45,326 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 38 [2022-01-10 02:52:45,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:45,326 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-01-10 02:52:45,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 02:52:45,327 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-01-10 02:52:45,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 02:52:45,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:45,329 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:45,343 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 02:52:45,537 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 02:52:45,538 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:45,538 INFO L85 PathProgramCache]: Analyzing trace with hash -173044206, now seen corresponding path program 1 times [2022-01-10 02:52:45,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:45,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936868283] [2022-01-10 02:52:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:45,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:45,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:45,540 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 02:52:45,541 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 02:52:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:45,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 02:52:45,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:52:45,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:52:46,476 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:46,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936868283] [2022-01-10 02:52:46,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936868283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:46,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:46,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-01-10 02:52:46,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674160023] [2022-01-10 02:52:46,477 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:46,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 02:52:46,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:46,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 02:52:46,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2022-01-10 02:52:46,479 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 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 02:52:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:48,328 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-01-10 02:52:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 02:52:48,329 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 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 42 [2022-01-10 02:52:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:48,330 INFO L225 Difference]: With dead ends: 88 [2022-01-10 02:52:48,330 INFO L226 Difference]: Without dead ends: 75 [2022-01-10 02:52:48,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2022-01-10 02:52:48,331 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:48,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:52:48,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-10 02:52:48,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-01-10 02:52:48,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 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 02:52:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-01-10 02:52:48,342 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 42 [2022-01-10 02:52:48,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:48,343 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-01-10 02:52:48,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 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 02:52:48,343 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-01-10 02:52:48,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 02:52:48,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:48,344 INFO L514 BasicCegarLoop]: trace histogram [32, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:48,353 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 02:52:48,553 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 02:52:48,553 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:48,554 INFO L85 PathProgramCache]: Analyzing trace with hash -113709502, now seen corresponding path program 2 times [2022-01-10 02:52:48,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:48,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503554653] [2022-01-10 02:52:48,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:48,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:48,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:48,555 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 02:52:48,557 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 02:52:48,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:48,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:48,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 02:52:48,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:52:49,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:52:51,381 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:51,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503554653] [2022-01-10 02:52:51,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503554653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:51,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:51,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2022-01-10 02:52:51,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076658515] [2022-01-10 02:52:51,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:51,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-10 02:52:51,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:51,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-10 02:52:51,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=2946, Unknown=0, NotChecked=0, Total=4032 [2022-01-10 02:52:51,385 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 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 02:53:04,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:04,206 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2022-01-10 02:53:04,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-10 02:53:04,207 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 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 74 [2022-01-10 02:53:04,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:04,208 INFO L225 Difference]: With dead ends: 152 [2022-01-10 02:53:04,209 INFO L226 Difference]: Without dead ends: 139 [2022-01-10 02:53:04,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=3006, Invalid=5736, Unknown=0, NotChecked=0, Total=8742 [2022-01-10 02:53:04,215 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 02:53:04,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 2231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2170 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 02:53:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-10 02:53:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-01-10 02:53:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 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 02:53:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2022-01-10 02:53:04,233 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 74 [2022-01-10 02:53:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:53:04,233 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2022-01-10 02:53:04,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 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 02:53:04,234 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2022-01-10 02:53:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-10 02:53:04,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:04,235 INFO L514 BasicCegarLoop]: trace histogram [64, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:04,251 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 02:53:04,447 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 02:53:04,448 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:04,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:04,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1272615262, now seen corresponding path program 3 times [2022-01-10 02:53:04,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:04,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532408558] [2022-01-10 02:53:04,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:53:04,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:04,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:04,451 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 02:53:04,452 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 02:53:04,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 02:53:04,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:53:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:53:04,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-01-10 02:53:04,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:53:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-01-10 02:53:04,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:04,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532408558] [2022-01-10 02:53:04,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532408558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:53:04,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:53:04,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 02:53:04,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340155397] [2022-01-10 02:53:04,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:53:04,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:53:04,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:04,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:53:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:53:04,958 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 02:53:05,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:05,088 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2022-01-10 02:53:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 02:53:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 138 [2022-01-10 02:53:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:05,090 INFO L225 Difference]: With dead ends: 167 [2022-01-10 02:53:05,090 INFO L226 Difference]: Without dead ends: 154 [2022-01-10 02:53:05,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-01-10 02:53:05,091 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:53:05,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:53:05,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-10 02:53:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-01-10 02:53:05,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0522875816993464) internal successors, (161), 153 states have internal predecessors, (161), 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 02:53:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 161 transitions. [2022-01-10 02:53:05,112 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 161 transitions. Word has length 138 [2022-01-10 02:53:05,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:53:05,113 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 161 transitions. [2022-01-10 02:53:05,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 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 02:53:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 161 transitions. [2022-01-10 02:53:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-10 02:53:05,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:05,122 INFO L514 BasicCegarLoop]: trace histogram [67, 62, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:05,133 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 02:53:05,330 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 02:53:05,331 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:05,331 INFO L85 PathProgramCache]: Analyzing trace with hash 850770551, now seen corresponding path program 4 times [2022-01-10 02:53:05,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:05,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114116279] [2022-01-10 02:53:05,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:53:05,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:05,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:05,333 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 02:53:05,333 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 02:53:05,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:53:05,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:53:05,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-10 02:53:05,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4509 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 02:53:07,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:53:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4509 backedges. 567 proven. 3906 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 02:53:15,441 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:15,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114116279] [2022-01-10 02:53:15,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114116279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:53:15,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:53:15,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 128 [2022-01-10 02:53:15,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390482411] [2022-01-10 02:53:15,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:53:15,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-10 02:53:15,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-10 02:53:15,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4222, Invalid=12034, Unknown=0, NotChecked=0, Total=16256 [2022-01-10 02:53:15,447 INFO L87 Difference]: Start difference. First operand 154 states and 161 transitions. Second operand has 128 states, 128 states have (on average 2.0625) internal successors, (264), 128 states have internal predecessors, (264), 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)