/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/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:52:12,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:52:12,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:52:12,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:52:12,412 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 02:52:12,428 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:52:12,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:52:12,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:52:12,429 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:52:12,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:52:12,430 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:52:12,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:52:12,431 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:52:12,431 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:52:12,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:52:12,432 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:52:12,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:52:12,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:52:12,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:52:12,432 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:52:12,433 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:52:12,433 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:52:12,433 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:52:12,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:52:12,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:52:12,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:52:12,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:52:12,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:52:12,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:52:12,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:52:12,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:52:12,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:52:12,435 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:52:12,435 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:52:12,436 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:52:12,436 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:52:12,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:52:12,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:52:12,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:52:12,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:52:12,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:52:12,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:52:12,677 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:52:12,679 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:52:12,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-01-10 02:52:12,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d893b6ed/75ab9dbb3ac14cfcafd4049f2f2d39fe/FLAGe420fab9e [2022-01-10 02:52:13,122 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:52:13,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2022-01-10 02:52:13,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d893b6ed/75ab9dbb3ac14cfcafd4049f2f2d39fe/FLAGe420fab9e [2022-01-10 02:52:13,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d893b6ed/75ab9dbb3ac14cfcafd4049f2f2d39fe [2022-01-10 02:52:13,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:52:13,141 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:52:13,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:52:13,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:52:13,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:52:13,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:52:13" (1/1) ... [2022-01-10 02:52:13,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79cb93eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13, skipping insertion in model container [2022-01-10 02:52:13,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:52:13" (1/1) ... [2022-01-10 02:52:13,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:52:13,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:52:13,303 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/loopv3.c[456,469] [2022-01-10 02:52:13,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:52:13,318 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:52:13,328 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/loopv3.c[456,469] [2022-01-10 02:52:13,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:52:13,341 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:52:13,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13 WrapperNode [2022-01-10 02:52:13,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:52:13,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:52:13,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:52:13,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:52:13,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13" (1/1) ... [2022-01-10 02:52:13,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13" (1/1) ... [2022-01-10 02:52:13,383 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2022-01-10 02:52:13,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:52:13,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:52:13,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:52:13,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:52:13,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13" (1/1) ... [2022-01-10 02:52:13,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13" (1/1) ... [2022-01-10 02:52:13,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13" (1/1) ... [2022-01-10 02:52:13,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13" (1/1) ... [2022-01-10 02:52:13,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13" (1/1) ... [2022-01-10 02:52:13,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13" (1/1) ... [2022-01-10 02:52:13,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13" (1/1) ... [2022-01-10 02:52:13,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:52:13,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:52:13,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:52:13,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:52:13,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13" (1/1) ... [2022-01-10 02:52:13,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:52:13,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:52:13,459 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 02:52:13,470 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 02:52:13,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:52:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:52:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:52:13,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:52:13,553 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:52:13,555 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:52:13,650 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:52:13,655 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:52:13,656 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 02:52:13,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:52:13 BoogieIcfgContainer [2022-01-10 02:52:13,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:52:13,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:52:13,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:52:13,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:52:13,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:52:13" (1/3) ... [2022-01-10 02:52:13,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a59161d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:52:13, skipping insertion in model container [2022-01-10 02:52:13,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:13" (2/3) ... [2022-01-10 02:52:13,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a59161d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:52:13, skipping insertion in model container [2022-01-10 02:52:13,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:52:13" (3/3) ... [2022-01-10 02:52:13,668 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.c [2022-01-10 02:52:13,672 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:52:13,672 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:52:13,720 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:52:13,725 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 02:52:13,725 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:52:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 02:52:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 02:52:13,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:13,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 02:52:13,740 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2022-01-10 02:52:13,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:13,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493778499] [2022-01-10 02:52:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:13,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:13,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:13,754 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 02:52:13,755 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 02:52:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:13,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 02:52:13,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:13,857 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 02:52:13,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:52:13,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:13,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493778499] [2022-01-10 02:52:13,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493778499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:52:13,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:52:13,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 02:52:13,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43088619] [2022-01-10 02:52:13,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:52:13,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 02:52:13,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:13,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 02:52:13,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:52:13,920 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 3.0) internal successors, (6), 2 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 02:52:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:13,934 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-01-10 02:52:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 02:52:13,937 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 02:52:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:13,942 INFO L225 Difference]: With dead ends: 20 [2022-01-10 02:52:13,943 INFO L226 Difference]: Without dead ends: 8 [2022-01-10 02:52:13,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 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 02:52:13,952 INFO L933 BasicCegarLoop]: 13 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, 13 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 02:52:13,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-01-10 02:52:13,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-01-10 02:52:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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 02:52:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-01-10 02:52:13,979 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-01-10 02:52:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:13,980 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-01-10 02:52:13,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 02:52:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-01-10 02:52:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 02:52:13,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:13,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 02:52:13,994 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 02:52:14,189 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 02:52:14,189 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:14,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:14,190 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2022-01-10 02:52:14,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:14,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198429891] [2022-01-10 02:52:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:14,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:14,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:14,192 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 02:52:14,194 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 02:52:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:14,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:52:14,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:14,279 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 02:52:14,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:52:14,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:14,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198429891] [2022-01-10 02:52:14,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198429891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:52:14,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:52:14,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:52:14,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918544561] [2022-01-10 02:52:14,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:52:14,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:52:14,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:14,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:52:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:52:14,282 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.5) 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 02:52:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:14,314 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2022-01-10 02:52:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:52:14,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 02:52:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:14,318 INFO L225 Difference]: With dead ends: 14 [2022-01-10 02:52:14,318 INFO L226 Difference]: Without dead ends: 10 [2022-01-10 02:52:14,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:52:14,319 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:14,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 7 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-01-10 02:52:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-01-10 02:52:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 02:52:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-01-10 02:52:14,323 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-01-10 02:52:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:14,323 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-01-10 02:52:14,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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 02:52:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-01-10 02:52:14,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 02:52:14,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:14,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:14,331 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 02:52:14,527 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 02:52:14,528 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash 297538966, now seen corresponding path program 1 times [2022-01-10 02:52:14,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:14,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278591204] [2022-01-10 02:52:14,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:14,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:14,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:14,531 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 02:52:14,532 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 02:52:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:14,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:52:14,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:14,645 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 02:52:14,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:14,714 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 02:52:14,714 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:14,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278591204] [2022-01-10 02:52:14,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278591204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:14,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:14,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-01-10 02:52:14,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616944338] [2022-01-10 02:52:14,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:14,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:52:14,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:14,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:52:14,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:52:14,717 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 02:52:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:14,845 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2022-01-10 02:52:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:52:14,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 8 [2022-01-10 02:52:14,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:14,850 INFO L225 Difference]: With dead ends: 19 [2022-01-10 02:52:14,850 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 02:52:14,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:52:14,851 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:14,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 9 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:14,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 02:52:14,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 02:52:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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 02:52:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-01-10 02:52:14,856 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2022-01-10 02:52:14,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:14,856 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-01-10 02:52:14,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 02:52:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-01-10 02:52:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 02:52:14,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:14,857 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:14,867 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 02:52:15,058 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 02:52:15,059 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:15,060 INFO L85 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 1 times [2022-01-10 02:52:15,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:15,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173318388] [2022-01-10 02:52:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:15,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:15,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:15,062 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 02:52:15,064 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 02:52:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:15,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:52:15,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:15,166 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 02:52:15,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:15,245 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 02:52:15,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:15,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173318388] [2022-01-10 02:52:15,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173318388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:15,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:15,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 02:52:15,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268624142] [2022-01-10 02:52:15,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:15,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:52:15,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:15,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:52:15,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:52:15,248 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 02:52:15,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:15,401 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2022-01-10 02:52:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 02:52:15,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 02:52:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:15,405 INFO L225 Difference]: With dead ends: 29 [2022-01-10 02:52:15,405 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 02:52:15,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-10 02:52:15,407 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:15,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 13 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 02:52:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-01-10 02:52:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 02:52:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-01-10 02:52:15,413 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 10 [2022-01-10 02:52:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:15,413 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-01-10 02:52:15,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 02:52:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-01-10 02:52:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 02:52:15,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:15,414 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:15,425 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 02:52:15,626 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 02:52:15,626 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:15,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1979276421, now seen corresponding path program 2 times [2022-01-10 02:52:15,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:15,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473602675] [2022-01-10 02:52:15,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:15,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:15,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:15,629 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 02:52:15,631 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 02:52:15,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:15,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:52:15,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:15,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:15,979 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:15,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473602675] [2022-01-10 02:52:15,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473602675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:15,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:15,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-01-10 02:52:15,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891202568] [2022-01-10 02:52:15,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:15,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:52:15,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:52:15,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:52:15,982 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 02:52:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:16,318 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2022-01-10 02:52:16,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 02:52:16,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 14 [2022-01-10 02:52:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:16,322 INFO L225 Difference]: With dead ends: 55 [2022-01-10 02:52:16,322 INFO L226 Difference]: Without dead ends: 51 [2022-01-10 02:52:16,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2022-01-10 02:52:16,323 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:16,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 21 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:52:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-10 02:52:16,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2022-01-10 02:52:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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 02:52:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2022-01-10 02:52:16,331 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 14 [2022-01-10 02:52:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:16,331 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2022-01-10 02:52:16,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 02:52:16,332 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2022-01-10 02:52:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 02:52:16,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:16,332 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:16,345 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 02:52:16,545 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 02:52:16,546 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:16,546 INFO L85 PathProgramCache]: Analyzing trace with hash 688990599, now seen corresponding path program 1 times [2022-01-10 02:52:16,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:16,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211861051] [2022-01-10 02:52:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:16,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:16,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:16,548 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 02:52:16,549 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 02:52:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:16,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:52:16,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:16,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:17,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:17,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211861051] [2022-01-10 02:52:17,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211861051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:17,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:17,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 02:52:17,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514296118] [2022-01-10 02:52:17,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:17,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 02:52:17,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:17,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 02:52:17,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-01-10 02:52:17,011 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 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 02:52:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:17,630 INFO L93 Difference]: Finished difference Result 86 states and 127 transitions. [2022-01-10 02:52:17,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 02:52:17,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 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 02:52:17,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:17,634 INFO L225 Difference]: With dead ends: 86 [2022-01-10 02:52:17,634 INFO L226 Difference]: Without dead ends: 82 [2022-01-10 02:52:17,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2022-01-10 02:52:17,636 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:17,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:52:17,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-10 02:52:17,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 49. [2022-01-10 02:52:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 48 states have internal predecessors, (70), 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 02:52:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 70 transitions. [2022-01-10 02:52:17,649 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 70 transitions. Word has length 18 [2022-01-10 02:52:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:17,649 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 70 transitions. [2022-01-10 02:52:17,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 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 02:52:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 70 transitions. [2022-01-10 02:52:17,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 02:52:17,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:17,651 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:17,661 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 02:52:17,861 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 02:52:17,862 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:17,862 INFO L85 PathProgramCache]: Analyzing trace with hash -530099449, now seen corresponding path program 2 times [2022-01-10 02:52:17,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:17,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115827025] [2022-01-10 02:52:17,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:17,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:17,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:17,864 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 02:52:17,866 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 02:52:17,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:17,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:17,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:52:17,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:18,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:18,251 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:18,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115827025] [2022-01-10 02:52:18,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115827025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:18,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:18,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 02:52:18,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739998596] [2022-01-10 02:52:18,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:18,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 02:52:18,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:18,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 02:52:18,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-01-10 02:52:18,253 INFO L87 Difference]: Start difference. First operand 49 states and 70 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 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 02:52:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:18,916 INFO L93 Difference]: Finished difference Result 150 states and 220 transitions. [2022-01-10 02:52:18,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 02:52:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 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 02:52:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:18,922 INFO L225 Difference]: With dead ends: 150 [2022-01-10 02:52:18,922 INFO L226 Difference]: Without dead ends: 146 [2022-01-10 02:52:18,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2022-01-10 02:52:18,924 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:18,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 23 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:52:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-10 02:52:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 75. [2022-01-10 02:52:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.472972972972973) internal successors, (109), 74 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 02:52:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 109 transitions. [2022-01-10 02:52:18,940 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 109 transitions. Word has length 18 [2022-01-10 02:52:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:18,941 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 109 transitions. [2022-01-10 02:52:18,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 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 02:52:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 109 transitions. [2022-01-10 02:52:18,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 02:52:18,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:18,942 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:18,953 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 02:52:19,150 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 02:52:19,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash -532671826, now seen corresponding path program 3 times [2022-01-10 02:52:19,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:19,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957872731] [2022-01-10 02:52:19,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:52:19,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:19,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:19,153 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 02:52:19,155 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 02:52:19,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-10 02:52:19,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:19,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 02:52:19,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:19,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:19,613 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:19,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957872731] [2022-01-10 02:52:19,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957872731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:19,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:19,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 02:52:19,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477953801] [2022-01-10 02:52:19,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:19,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 02:52:19,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:19,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 02:52:19,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-01-10 02:52:19,615 INFO L87 Difference]: Start difference. First operand 75 states and 109 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 02:52:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:20,427 INFO L93 Difference]: Finished difference Result 239 states and 354 transitions. [2022-01-10 02:52:20,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 02:52:20,434 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 20 [2022-01-10 02:52:20,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:20,435 INFO L225 Difference]: With dead ends: 239 [2022-01-10 02:52:20,435 INFO L226 Difference]: Without dead ends: 235 [2022-01-10 02:52:20,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=478, Unknown=0, NotChecked=0, Total=756 [2022-01-10 02:52:20,437 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:20,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 23 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:52:20,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-10 02:52:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 117. [2022-01-10 02:52:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4827586206896552) internal successors, (172), 116 states have internal predecessors, (172), 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 02:52:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 172 transitions. [2022-01-10 02:52:20,473 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 172 transitions. Word has length 20 [2022-01-10 02:52:20,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:20,473 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 172 transitions. [2022-01-10 02:52:20,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 02:52:20,474 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 172 transitions. [2022-01-10 02:52:20,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 02:52:20,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:20,478 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:20,489 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 02:52:20,687 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 02:52:20,688 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:20,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:20,688 INFO L85 PathProgramCache]: Analyzing trace with hash -234041558, now seen corresponding path program 4 times [2022-01-10 02:52:20,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:20,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419691138] [2022-01-10 02:52:20,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:52:20,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:20,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:20,689 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 02:52:20,690 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 02:52:20,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:52:20,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:20,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 02:52:20,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:20,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:21,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:21,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419691138] [2022-01-10 02:52:21,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419691138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:21,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:21,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-01-10 02:52:21,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140884960] [2022-01-10 02:52:21,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:21,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 02:52:21,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 02:52:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-01-10 02:52:21,113 INFO L87 Difference]: Start difference. First operand 117 states and 172 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 02:52:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:21,854 INFO L93 Difference]: Finished difference Result 318 states and 469 transitions. [2022-01-10 02:52:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 02:52:21,857 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 20 [2022-01-10 02:52:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:21,859 INFO L225 Difference]: With dead ends: 318 [2022-01-10 02:52:21,859 INFO L226 Difference]: Without dead ends: 314 [2022-01-10 02:52:21,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=478, Unknown=0, NotChecked=0, Total=756 [2022-01-10 02:52:21,860 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:21,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 21 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:52:21,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-10 02:52:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 151. [2022-01-10 02:52:21,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4866666666666666) internal successors, (223), 150 states have internal predecessors, (223), 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 02:52:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 223 transitions. [2022-01-10 02:52:21,889 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 223 transitions. Word has length 20 [2022-01-10 02:52:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:21,889 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 223 transitions. [2022-01-10 02:52:21,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 02:52:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 223 transitions. [2022-01-10 02:52:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 02:52:21,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:21,890 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:21,897 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 02:52:22,094 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 02:52:22,095 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:22,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:22,096 INFO L85 PathProgramCache]: Analyzing trace with hash -738166893, now seen corresponding path program 5 times [2022-01-10 02:52:22,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:22,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767720921] [2022-01-10 02:52:22,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:52:22,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:22,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:22,097 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 02:52:22,100 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 02:52:22,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-10 02:52:22,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:22,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 02:52:22,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:22,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:22,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:22,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767720921] [2022-01-10 02:52:22,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767720921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:22,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:22,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-01-10 02:52:22,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764408122] [2022-01-10 02:52:22,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:22,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 02:52:22,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:22,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 02:52:22,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-01-10 02:52:22,598 INFO L87 Difference]: Start difference. First operand 151 states and 223 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 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 02:52:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:23,546 INFO L93 Difference]: Finished difference Result 427 states and 632 transitions. [2022-01-10 02:52:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 02:52:23,550 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 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 02:52:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:23,552 INFO L225 Difference]: With dead ends: 427 [2022-01-10 02:52:23,552 INFO L226 Difference]: Without dead ends: 423 [2022-01-10 02:52:23,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=339, Invalid=591, Unknown=0, NotChecked=0, Total=930 [2022-01-10 02:52:23,554 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:23,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 27 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 02:52:23,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-10 02:52:23,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 187. [2022-01-10 02:52:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.489247311827957) internal successors, (277), 186 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 02:52:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 277 transitions. [2022-01-10 02:52:23,592 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 277 transitions. Word has length 22 [2022-01-10 02:52:23,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:23,593 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 277 transitions. [2022-01-10 02:52:23,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 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 02:52:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 277 transitions. [2022-01-10 02:52:23,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 02:52:23,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:23,594 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:23,603 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 02:52:23,802 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 02:52:23,803 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:23,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:23,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1624043889, now seen corresponding path program 6 times [2022-01-10 02:52:23,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:23,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572969151] [2022-01-10 02:52:23,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:52:23,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:23,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:23,804 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 02:52:23,805 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 02:52:23,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-10 02:52:23,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:23,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 02:52:23,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:24,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:24,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572969151] [2022-01-10 02:52:24,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572969151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:24,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:24,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-01-10 02:52:24,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673643653] [2022-01-10 02:52:24,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:24,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 02:52:24,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:24,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 02:52:24,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-01-10 02:52:24,294 INFO L87 Difference]: Start difference. First operand 187 states and 277 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 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 02:52:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:25,334 INFO L93 Difference]: Finished difference Result 435 states and 642 transitions. [2022-01-10 02:52:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 02:52:25,343 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 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 02:52:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:25,347 INFO L225 Difference]: With dead ends: 435 [2022-01-10 02:52:25,347 INFO L226 Difference]: Without dead ends: 431 [2022-01-10 02:52:25,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=339, Invalid=591, Unknown=0, NotChecked=0, Total=930 [2022-01-10 02:52:25,349 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:25,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 27 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 02:52:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-01-10 02:52:25,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 221. [2022-01-10 02:52:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.490909090909091) internal successors, (328), 220 states have internal predecessors, (328), 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 02:52:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 328 transitions. [2022-01-10 02:52:25,399 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 328 transitions. Word has length 22 [2022-01-10 02:52:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:25,399 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 328 transitions. [2022-01-10 02:52:25,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 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 02:52:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 328 transitions. [2022-01-10 02:52:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 02:52:25,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:25,401 INFO L514 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:25,409 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 02:52:25,608 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 02:52:25,609 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:25,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2031553612, now seen corresponding path program 7 times [2022-01-10 02:52:25,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:25,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719073158] [2022-01-10 02:52:25,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:52:25,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:25,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:25,611 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 02:52:25,611 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 02:52:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:25,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 02:52:25,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:25,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:26,229 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:26,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719073158] [2022-01-10 02:52:26,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719073158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:26,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:26,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-01-10 02:52:26,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505416621] [2022-01-10 02:52:26,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:26,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 02:52:26,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:26,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 02:52:26,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 02:52:26,230 INFO L87 Difference]: Start difference. First operand 221 states and 328 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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 02:52:27,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:27,316 INFO L93 Difference]: Finished difference Result 566 states and 844 transitions. [2022-01-10 02:52:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 02:52:27,319 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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 24 [2022-01-10 02:52:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:27,321 INFO L225 Difference]: With dead ends: 566 [2022-01-10 02:52:27,322 INFO L226 Difference]: Without dead ends: 562 [2022-01-10 02:52:27,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:52:27,323 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:27,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 25 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 02:52:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-10 02:52:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 197. [2022-01-10 02:52:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.489795918367347) internal successors, (292), 196 states have internal predecessors, (292), 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 02:52:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 292 transitions. [2022-01-10 02:52:27,370 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 292 transitions. Word has length 24 [2022-01-10 02:52:27,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:27,370 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 292 transitions. [2022-01-10 02:52:27,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 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 02:52:27,371 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 292 transitions. [2022-01-10 02:52:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 02:52:27,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:27,372 INFO L514 BasicCegarLoop]: trace histogram [11, 6, 5, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:27,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 02:52:27,580 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 02:52:27,580 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:27,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:27,580 INFO L85 PathProgramCache]: Analyzing trace with hash 195124798, now seen corresponding path program 8 times [2022-01-10 02:52:27,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:27,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356234510] [2022-01-10 02:52:27,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:27,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:27,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:27,582 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 02:52:27,584 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 02:52:27,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:27,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:27,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 02:52:27,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:27,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:28,254 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:28,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356234510] [2022-01-10 02:52:28,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356234510] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:28,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:28,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-01-10 02:52:28,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593571341] [2022-01-10 02:52:28,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:28,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 02:52:28,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:28,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 02:52:28,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-01-10 02:52:28,257 INFO L87 Difference]: Start difference. First operand 197 states and 292 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:52:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:29,909 INFO L93 Difference]: Finished difference Result 582 states and 864 transitions. [2022-01-10 02:52:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 02:52:29,912 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-10 02:52:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:29,915 INFO L225 Difference]: With dead ends: 582 [2022-01-10 02:52:29,915 INFO L226 Difference]: Without dead ends: 578 [2022-01-10 02:52:29,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 02:52:29,917 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:29,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 35 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 02:52:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-10 02:52:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 305. [2022-01-10 02:52:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.493421052631579) internal successors, (454), 304 states have internal predecessors, (454), 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 02:52:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 454 transitions. [2022-01-10 02:52:30,014 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 454 transitions. Word has length 28 [2022-01-10 02:52:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:30,015 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 454 transitions. [2022-01-10 02:52:30,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:52:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 454 transitions. [2022-01-10 02:52:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 02:52:30,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:30,016 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 3, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:30,024 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 02:52:30,224 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 02:52:30,224 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:30,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1649192376, now seen corresponding path program 9 times [2022-01-10 02:52:30,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:30,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455182921] [2022-01-10 02:52:30,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:52:30,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:30,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:30,226 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 02:52:30,227 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 02:52:30,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-10 02:52:30,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:30,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 02:52:30,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:30,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:30,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:30,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455182921] [2022-01-10 02:52:30,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455182921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:30,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:30,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-01-10 02:52:30,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123343209] [2022-01-10 02:52:30,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:30,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 02:52:30,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:30,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 02:52:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-01-10 02:52:30,913 INFO L87 Difference]: Start difference. First operand 305 states and 454 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:52:32,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:32,639 INFO L93 Difference]: Finished difference Result 886 states and 1317 transitions. [2022-01-10 02:52:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 02:52:32,642 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-10 02:52:32,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:32,645 INFO L225 Difference]: With dead ends: 886 [2022-01-10 02:52:32,645 INFO L226 Difference]: Without dead ends: 882 [2022-01-10 02:52:32,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 02:52:32,647 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:32,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 29 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 02:52:32,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-01-10 02:52:32,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 373. [2022-01-10 02:52:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.4946236559139785) internal successors, (556), 372 states have internal predecessors, (556), 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 02:52:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 556 transitions. [2022-01-10 02:52:32,807 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 556 transitions. Word has length 28 [2022-01-10 02:52:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:32,807 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 556 transitions. [2022-01-10 02:52:32,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:52:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 556 transitions. [2022-01-10 02:52:32,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 02:52:32,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:32,808 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 3, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:32,819 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 02:52:33,016 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 02:52:33,016 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:33,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1837304008, now seen corresponding path program 10 times [2022-01-10 02:52:33,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:33,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45173454] [2022-01-10 02:52:33,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:52:33,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:33,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:33,018 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 02:52:33,019 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 02:52:33,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:52:33,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:33,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 02:52:33,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:33,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:33,623 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:33,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45173454] [2022-01-10 02:52:33,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45173454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:33,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:33,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-01-10 02:52:33,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082780563] [2022-01-10 02:52:33,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:33,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 02:52:33,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:33,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 02:52:33,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-01-10 02:52:33,625 INFO L87 Difference]: Start difference. First operand 373 states and 556 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:52:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:35,494 INFO L93 Difference]: Finished difference Result 951 states and 1411 transitions. [2022-01-10 02:52:35,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-10 02:52:35,497 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-10 02:52:35,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:35,501 INFO L225 Difference]: With dead ends: 951 [2022-01-10 02:52:35,501 INFO L226 Difference]: Without dead ends: 947 [2022-01-10 02:52:35,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 02:52:35,502 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:35,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 31 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 02:52:35,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-01-10 02:52:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 461. [2022-01-10 02:52:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4956521739130435) internal successors, (688), 460 states have internal predecessors, (688), 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 02:52:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 688 transitions. [2022-01-10 02:52:35,703 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 688 transitions. Word has length 28 [2022-01-10 02:52:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:35,703 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 688 transitions. [2022-01-10 02:52:35,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:52:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 688 transitions. [2022-01-10 02:52:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 02:52:35,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:35,705 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 4, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:35,715 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 02:52:35,914 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 02:52:35,915 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:35,915 INFO L85 PathProgramCache]: Analyzing trace with hash 607387933, now seen corresponding path program 11 times [2022-01-10 02:52:35,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:35,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125571674] [2022-01-10 02:52:35,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:52:35,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:35,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:35,916 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 02:52:35,917 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 02:52:35,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-10 02:52:35,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:35,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 02:52:35,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:36,195 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:36,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:36,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:36,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125571674] [2022-01-10 02:52:36,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125571674] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:36,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:36,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-01-10 02:52:36,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742981067] [2022-01-10 02:52:36,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:36,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-10 02:52:36,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-10 02:52:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2022-01-10 02:52:36,645 INFO L87 Difference]: Start difference. First operand 461 states and 688 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 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 02:52:38,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:38,957 INFO L93 Difference]: Finished difference Result 1196 states and 1783 transitions. [2022-01-10 02:52:38,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 02:52:38,959 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 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 02:52:38,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:38,963 INFO L225 Difference]: With dead ends: 1196 [2022-01-10 02:52:38,963 INFO L226 Difference]: Without dead ends: 1192 [2022-01-10 02:52:38,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=643, Invalid=1163, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 02:52:38,965 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:38,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 02:52:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2022-01-10 02:52:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 327. [2022-01-10 02:52:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.4938650306748467) internal successors, (487), 326 states have internal predecessors, (487), 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 02:52:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 487 transitions. [2022-01-10 02:52:39,168 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 487 transitions. Word has length 30 [2022-01-10 02:52:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:39,168 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 487 transitions. [2022-01-10 02:52:39,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 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 02:52:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 487 transitions. [2022-01-10 02:52:39,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 02:52:39,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:39,169 INFO L514 BasicCegarLoop]: trace histogram [13, 7, 6, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:39,177 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 02:52:39,375 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 02:52:39,375 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1502192836, now seen corresponding path program 12 times [2022-01-10 02:52:39,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:39,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703070700] [2022-01-10 02:52:39,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:52:39,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:39,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:39,377 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 02:52:39,378 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 02:52:39,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-01-10 02:52:39,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:39,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 02:52:39,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:39,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:40,224 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:40,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703070700] [2022-01-10 02:52:40,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703070700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:40,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:40,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2022-01-10 02:52:40,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412336665] [2022-01-10 02:52:40,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:40,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 02:52:40,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:40,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 02:52:40,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2022-01-10 02:52:40,226 INFO L87 Difference]: Start difference. First operand 327 states and 487 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 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 02:52:43,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:43,175 INFO L93 Difference]: Finished difference Result 1173 states and 1743 transitions. [2022-01-10 02:52:43,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-10 02:52:43,178 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 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 02:52:43,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:43,181 INFO L225 Difference]: With dead ends: 1173 [2022-01-10 02:52:43,181 INFO L226 Difference]: Without dead ends: 1169 [2022-01-10 02:52:43,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2022-01-10 02:52:43,183 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:43,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 33 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 02:52:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-01-10 02:52:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 437. [2022-01-10 02:52:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 1.4954128440366972) internal successors, (652), 436 states have internal predecessors, (652), 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 02:52:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 652 transitions. [2022-01-10 02:52:43,502 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 652 transitions. Word has length 32 [2022-01-10 02:52:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:43,502 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 652 transitions. [2022-01-10 02:52:43,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 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 02:52:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 652 transitions. [2022-01-10 02:52:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 02:52:43,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:43,503 INFO L514 BasicCegarLoop]: trace histogram [14, 10, 4, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:43,509 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 02:52:43,703 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 02:52:43,704 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:43,704 INFO L85 PathProgramCache]: Analyzing trace with hash -998964049, now seen corresponding path program 13 times [2022-01-10 02:52:43,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:43,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113298414] [2022-01-10 02:52:43,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:52:43,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:43,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:43,705 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 02:52:43,706 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 02:52:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:43,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 02:52:43,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:43,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:44,681 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:44,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113298414] [2022-01-10 02:52:44,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113298414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:44,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:44,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2022-01-10 02:52:44,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193089867] [2022-01-10 02:52:44,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:44,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 02:52:44,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:44,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 02:52:44,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:52:44,683 INFO L87 Difference]: Start difference. First operand 437 states and 652 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:52:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:48,457 INFO L93 Difference]: Finished difference Result 1574 states and 2345 transitions. [2022-01-10 02:52:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-10 02:52:48,461 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:52:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:48,465 INFO L225 Difference]: With dead ends: 1574 [2022-01-10 02:52:48,466 INFO L226 Difference]: Without dead ends: 1570 [2022-01-10 02:52:48,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=831, Invalid=1521, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 02:52:48,467 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:48,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 37 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 02:52:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2022-01-10 02:52:49,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 637. [2022-01-10 02:52:49,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 1.4968553459119496) internal successors, (952), 636 states have internal predecessors, (952), 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 02:52:49,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 952 transitions. [2022-01-10 02:52:49,156 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 952 transitions. Word has length 34 [2022-01-10 02:52:49,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:49,157 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 952 transitions. [2022-01-10 02:52:49,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:52:49,157 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 952 transitions. [2022-01-10 02:52:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 02:52:49,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:49,158 INFO L514 BasicCegarLoop]: trace histogram [14, 9, 5, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:49,167 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 02:52:49,367 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 02:52:49,367 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:49,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:49,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1379809197, now seen corresponding path program 14 times [2022-01-10 02:52:49,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:49,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562362285] [2022-01-10 02:52:49,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:49,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:49,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:49,369 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 02:52:49,374 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 02:52:49,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:49,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:49,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 02:52:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:49,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:50,254 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:50,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562362285] [2022-01-10 02:52:50,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562362285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:50,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:50,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2022-01-10 02:52:50,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109248224] [2022-01-10 02:52:50,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:50,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 02:52:50,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:50,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 02:52:50,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:52:50,256 INFO L87 Difference]: Start difference. First operand 637 states and 952 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:52:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:54,652 INFO L93 Difference]: Finished difference Result 1823 states and 2709 transitions. [2022-01-10 02:52:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-10 02:52:54,655 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:52:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:54,659 INFO L225 Difference]: With dead ends: 1823 [2022-01-10 02:52:54,659 INFO L226 Difference]: Without dead ends: 1819 [2022-01-10 02:52:54,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=831, Invalid=1521, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 02:52:54,661 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:54,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 37 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 02:52:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2022-01-10 02:52:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 739. [2022-01-10 02:52:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 1.497289972899729) internal successors, (1105), 738 states have internal predecessors, (1105), 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 02:52:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1105 transitions. [2022-01-10 02:52:55,595 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1105 transitions. Word has length 34 [2022-01-10 02:52:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:55,595 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1105 transitions. [2022-01-10 02:52:55,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:52:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1105 transitions. [2022-01-10 02:52:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 02:52:55,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:55,597 INFO L514 BasicCegarLoop]: trace histogram [14, 8, 6, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:55,607 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 02:52:55,805 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 02:52:55,805 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:55,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:55,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1550723879, now seen corresponding path program 15 times [2022-01-10 02:52:55,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:55,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656139967] [2022-01-10 02:52:55,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:52:55,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:55,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:55,807 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 02:52:55,808 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 02:52:55,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-01-10 02:52:55,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:55,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 02:52:55,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:56,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:56,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:56,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656139967] [2022-01-10 02:52:56,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656139967] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:56,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:56,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2022-01-10 02:52:56,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117107314] [2022-01-10 02:52:56,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:56,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 02:52:56,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:56,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 02:52:56,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:52:56,662 INFO L87 Difference]: Start difference. First operand 739 states and 1105 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:53:02,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:02,294 INFO L93 Difference]: Finished difference Result 2371 states and 3519 transitions. [2022-01-10 02:53:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-10 02:53:02,298 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:53:02,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:02,304 INFO L225 Difference]: With dead ends: 2371 [2022-01-10 02:53:02,304 INFO L226 Difference]: Without dead ends: 2367 [2022-01-10 02:53:02,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=831, Invalid=1521, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 02:53:02,306 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 02:53:02,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 02:53:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2022-01-10 02:53:03,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 919. [2022-01-10 02:53:03,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.4978213507625273) internal successors, (1375), 918 states have internal predecessors, (1375), 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 02:53:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1375 transitions. [2022-01-10 02:53:03,658 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1375 transitions. Word has length 34 [2022-01-10 02:53:03,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:53:03,658 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1375 transitions. [2022-01-10 02:53:03,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:53:03,659 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1375 transitions. [2022-01-10 02:53:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 02:53:03,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:03,660 INFO L514 BasicCegarLoop]: trace histogram [14, 8, 6, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:03,670 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 02:53:03,869 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 02:53:03,869 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:03,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:03,869 INFO L85 PathProgramCache]: Analyzing trace with hash 2041559467, now seen corresponding path program 16 times [2022-01-10 02:53:03,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:03,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021273270] [2022-01-10 02:53:03,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:53:03,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:03,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:03,872 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 02:53:03,872 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 02:53:03,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:53:03,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:53:03,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 02:53:03,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:53:04,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:53:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:53:04,670 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:04,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021273270] [2022-01-10 02:53:04,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021273270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:53:04,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:53:04,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2022-01-10 02:53:04,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461090436] [2022-01-10 02:53:04,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:53:04,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 02:53:04,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 02:53:04,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:53:04,672 INFO L87 Difference]: Start difference. First operand 919 states and 1375 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:53:10,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:10,919 INFO L93 Difference]: Finished difference Result 2696 states and 4006 transitions. [2022-01-10 02:53:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-10 02:53:10,922 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:53:10,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:10,930 INFO L225 Difference]: With dead ends: 2696 [2022-01-10 02:53:10,930 INFO L226 Difference]: Without dead ends: 2692 [2022-01-10 02:53:10,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=831, Invalid=1521, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 02:53:10,932 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 02:53:10,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 35 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 02:53:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2022-01-10 02:53:12,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 1053. [2022-01-10 02:53:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 1.4980988593155893) internal successors, (1576), 1052 states have internal predecessors, (1576), 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 02:53:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1576 transitions. [2022-01-10 02:53:12,681 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1576 transitions. Word has length 34 [2022-01-10 02:53:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:53:12,681 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 1576 transitions. [2022-01-10 02:53:12,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:53:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1576 transitions. [2022-01-10 02:53:12,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 02:53:12,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:12,683 INFO L514 BasicCegarLoop]: trace histogram [14, 9, 5, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:12,692 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 02:53:12,891 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 02:53:12,892 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:12,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash -828144091, now seen corresponding path program 17 times [2022-01-10 02:53:12,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:12,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216595707] [2022-01-10 02:53:12,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:53:12,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:12,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:12,894 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 02:53:12,895 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 02:53:12,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-01-10 02:53:12,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:53:12,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 02:53:12,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:53:13,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:53:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:53:13,741 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:13,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216595707] [2022-01-10 02:53:13,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216595707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:53:13,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:53:13,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2022-01-10 02:53:13,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781793870] [2022-01-10 02:53:13,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:53:13,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 02:53:13,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:13,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 02:53:13,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:53:13,743 INFO L87 Difference]: Start difference. First operand 1053 states and 1576 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:53:22,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:22,017 INFO L93 Difference]: Finished difference Result 3202 states and 4748 transitions. [2022-01-10 02:53:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-10 02:53:22,021 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 02:53:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:22,028 INFO L225 Difference]: With dead ends: 3202 [2022-01-10 02:53:22,028 INFO L226 Difference]: Without dead ends: 3198 [2022-01-10 02:53:22,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=831, Invalid=1521, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 02:53:22,030 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 02:53:22,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 35 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 02:53:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states.