/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/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:43:13,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:43:13,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:43:13,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:43:13,606 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 02:43:13,619 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:43:13,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:43:13,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:43:13,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:43:13,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:43:13,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:43:13,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:43:13,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:43:13,620 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:43:13,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:43:13,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:43:13,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:43:13,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:43:13,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:43:13,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:43:13,621 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:43:13,621 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:43:13,621 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:43:13,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:43:13,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:43:13,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:43:13,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:43:13,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:43:13,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:43:13,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:43:13,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:43:13,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:43:13,622 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:43:13,622 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:43:13,622 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:43:13,622 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:43:13,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:43:13,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:43:13,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:43:13,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:43:13,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:43:13,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:43:13,811 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:43:13,813 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:43:13,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-01-10 02:43:13,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3d636679/d865dca2909647e1949e7cb5a0728a59/FLAGfdd8b9913 [2022-01-10 02:43:14,156 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:43:14,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-01-10 02:43:14,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3d636679/d865dca2909647e1949e7cb5a0728a59/FLAGfdd8b9913 [2022-01-10 02:43:14,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3d636679/d865dca2909647e1949e7cb5a0728a59 [2022-01-10 02:43:14,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:43:14,590 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:43:14,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:43:14,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:43:14,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:43:14,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:43:14" (1/1) ... [2022-01-10 02:43:14,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54229e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14, skipping insertion in model container [2022-01-10 02:43:14,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:43:14" (1/1) ... [2022-01-10 02:43:14,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:43:14,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:43:14,776 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/vogal-2.i[808,821] [2022-01-10 02:43:14,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:43:14,807 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:43:14,817 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/vogal-2.i[808,821] [2022-01-10 02:43:14,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:43:14,850 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:43:14,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14 WrapperNode [2022-01-10 02:43:14,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:43:14,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:43:14,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:43:14,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:43:14,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14" (1/1) ... [2022-01-10 02:43:14,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14" (1/1) ... [2022-01-10 02:43:14,888 INFO L137 Inliner]: procedures = 16, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 123 [2022-01-10 02:43:14,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:43:14,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:43:14,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:43:14,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:43:14,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14" (1/1) ... [2022-01-10 02:43:14,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14" (1/1) ... [2022-01-10 02:43:14,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14" (1/1) ... [2022-01-10 02:43:14,901 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14" (1/1) ... [2022-01-10 02:43:14,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14" (1/1) ... [2022-01-10 02:43:14,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14" (1/1) ... [2022-01-10 02:43:14,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14" (1/1) ... [2022-01-10 02:43:14,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:43:14,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:43:14,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:43:14,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:43:14,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14" (1/1) ... [2022-01-10 02:43:14,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:43:14,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:43:14,955 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 02:43:14,969 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 02:43:14,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:43:14,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-01-10 02:43:14,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:43:14,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 02:43:14,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:43:14,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:43:14,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-01-10 02:43:14,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 02:43:15,058 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:43:15,059 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:43:15,213 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:43:15,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:43:15,218 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-10 02:43:15,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:43:15 BoogieIcfgContainer [2022-01-10 02:43:15,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:43:15,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:43:15,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:43:15,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:43:15,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:43:14" (1/3) ... [2022-01-10 02:43:15,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4210492a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:43:15, skipping insertion in model container [2022-01-10 02:43:15,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:43:14" (2/3) ... [2022-01-10 02:43:15,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4210492a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:43:15, skipping insertion in model container [2022-01-10 02:43:15,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:43:15" (3/3) ... [2022-01-10 02:43:15,225 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-01-10 02:43:15,239 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:43:15,240 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:43:15,303 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:43:15,311 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 02:43:15,311 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:43:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 02:43:15,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:15,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:15,330 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash -814739894, now seen corresponding path program 1 times [2022-01-10 02:43:15,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:15,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986198002] [2022-01-10 02:43:15,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:43:15,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:15,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:15,348 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 02:43:15,349 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 02:43:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:43:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 02:43:15,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:15,479 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 02:43:15,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:43:15,480 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:15,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986198002] [2022-01-10 02:43:15,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986198002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:43:15,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:43:15,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 02:43:15,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068851550] [2022-01-10 02:43:15,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:43:15,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 02:43:15,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:15,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 02:43:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:43:15,508 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:15,522 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2022-01-10 02:43:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 02:43:15,523 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 02:43:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:15,528 INFO L225 Difference]: With dead ends: 52 [2022-01-10 02:43:15,528 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 02:43:15,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 02:43:15,533 INFO L933 BasicCegarLoop]: 35 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, 35 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 02:43:15,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:43:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 02:43:15,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 02:43:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 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 02:43:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-01-10 02:43:15,555 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2022-01-10 02:43:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:15,556 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-01-10 02:43:15,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:15,556 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-01-10 02:43:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 02:43:15,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:15,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:15,565 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 02:43:15,759 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 02:43:15,762 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:15,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:15,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1144484620, now seen corresponding path program 1 times [2022-01-10 02:43:15,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:15,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926915317] [2022-01-10 02:43:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:43:15,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:15,764 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 02:43:15,766 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 02:43:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:43:15,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:43:15,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:15,855 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 02:43:15,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:43:15,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:15,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926915317] [2022-01-10 02:43:15,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926915317] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:43:15,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:43:15,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:43:15,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333782442] [2022-01-10 02:43:15,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:43:15,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:43:15,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:15,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:43:15,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:43:15,858 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:15,895 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-01-10 02:43:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:43:15,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-10 02:43:15,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:15,896 INFO L225 Difference]: With dead ends: 62 [2022-01-10 02:43:15,896 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 02:43:15,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:43:15,897 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:15,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:43:15,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 02:43:15,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2022-01-10 02:43:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 02:43:15,901 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2022-01-10 02:43:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:15,901 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 02:43:15,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 02:43:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 02:43:15,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:15,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:15,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 02:43:16,108 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 02:43:16,109 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:16,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1978272138, now seen corresponding path program 1 times [2022-01-10 02:43:16,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:16,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276147943] [2022-01-10 02:43:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:43:16,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:16,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:16,111 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 02:43:16,113 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 02:43:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:43:16,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:43:16,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:16,199 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 02:43:16,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:16,251 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 02:43:16,251 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:16,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276147943] [2022-01-10 02:43:16,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276147943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:43:16,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:43:16,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:43:16,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782654400] [2022-01-10 02:43:16,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:43:16,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:43:16,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:43:16,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:43:16,256 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:16,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:16,401 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2022-01-10 02:43:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:43:16,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 02:43:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:16,403 INFO L225 Difference]: With dead ends: 115 [2022-01-10 02:43:16,403 INFO L226 Difference]: Without dead ends: 95 [2022-01-10 02:43:16,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:43:16,404 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 131 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:16,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 103 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:43:16,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-10 02:43:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 31. [2022-01-10 02:43:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-01-10 02:43:16,410 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 16 [2022-01-10 02:43:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:16,410 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-01-10 02:43:16,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:16,410 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-01-10 02:43:16,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 02:43:16,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:16,411 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:16,419 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 02:43:16,619 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 02:43:16,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:16,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:16,621 INFO L85 PathProgramCache]: Analyzing trace with hash 353148924, now seen corresponding path program 2 times [2022-01-10 02:43:16,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:16,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854123709] [2022-01-10 02:43:16,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:43:16,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:16,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:16,623 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 02:43:16,629 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 02:43:16,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 02:43:16,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:43:16,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:43:16,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:43:16,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:43:16,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:16,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854123709] [2022-01-10 02:43:16,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854123709] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:43:16,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:43:16,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 02:43:16,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764362706] [2022-01-10 02:43:16,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:43:16,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 02:43:16,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 02:43:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:43:16,774 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:16,808 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-01-10 02:43:16,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:43:16,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-10 02:43:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:16,811 INFO L225 Difference]: With dead ends: 57 [2022-01-10 02:43:16,811 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 02:43:16,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:43:16,812 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:16,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 120 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:43:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 02:43:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2022-01-10 02:43:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 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 02:43:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-01-10 02:43:16,816 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-01-10 02:43:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:16,816 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-01-10 02:43:16,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:16,816 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-01-10 02:43:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 02:43:16,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:16,817 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:16,825 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 02:43:17,017 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 02:43:17,018 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1510518685, now seen corresponding path program 1 times [2022-01-10 02:43:17,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:17,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974328415] [2022-01-10 02:43:17,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:43:17,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:17,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:17,020 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 02:43:17,020 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 02:43:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:43:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:43:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:43:17,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:43:17,240 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:17,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974328415] [2022-01-10 02:43:17,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974328415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:43:17,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:43:17,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:43:17,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659147003] [2022-01-10 02:43:17,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:43:17,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:43:17,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:17,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:43:17,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:43:17,241 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:17,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:17,624 INFO L93 Difference]: Finished difference Result 365 states and 493 transitions. [2022-01-10 02:43:17,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 02:43:17,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-10 02:43:17,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:17,626 INFO L225 Difference]: With dead ends: 365 [2022-01-10 02:43:17,626 INFO L226 Difference]: Without dead ends: 333 [2022-01-10 02:43:17,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:43:17,627 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 478 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:17,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 433 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:43:17,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-10 02:43:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 55. [2022-01-10 02:43:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-01-10 02:43:17,636 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 28 [2022-01-10 02:43:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:17,636 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-01-10 02:43:17,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-01-10 02:43:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 02:43:17,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:17,637 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:17,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 02:43:17,843 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 02:43:17,843 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash -486837009, now seen corresponding path program 2 times [2022-01-10 02:43:17,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:17,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078761392] [2022-01-10 02:43:17,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:43:17,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:17,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:17,846 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 02:43:17,846 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 02:43:17,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:43:17,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:43:17,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:43:17,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-01-10 02:43:17,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:43:17,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:17,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078761392] [2022-01-10 02:43:17,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078761392] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:43:17,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:43:17,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:43:17,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107420290] [2022-01-10 02:43:17,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:43:17,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:43:17,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:43:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:43:17,975 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:17,990 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2022-01-10 02:43:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:43:17,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-10 02:43:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:17,991 INFO L225 Difference]: With dead ends: 104 [2022-01-10 02:43:17,992 INFO L226 Difference]: Without dead ends: 76 [2022-01-10 02:43:17,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:43:17,992 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:17,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 53 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:43:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-10 02:43:17,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2022-01-10 02:43:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-01-10 02:43:17,999 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 40 [2022-01-10 02:43:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:17,999 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-01-10 02:43:17,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-01-10 02:43:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 02:43:18,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:18,000 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:18,011 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 02:43:18,207 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 02:43:18,207 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:18,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1327229463, now seen corresponding path program 1 times [2022-01-10 02:43:18,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:18,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040971839] [2022-01-10 02:43:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:43:18,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:18,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:18,209 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 02:43:18,210 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 02:43:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:43:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:43:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:18,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-01-10 02:43:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-01-10 02:43:18,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:43:18,406 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040971839] [2022-01-10 02:43:18,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040971839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:43:18,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:43:18,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:43:18,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722169835] [2022-01-10 02:43:18,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:43:18,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:43:18,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:18,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:43:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:43:18,407 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:18,514 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2022-01-10 02:43:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:43:18,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-01-10 02:43:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:18,515 INFO L225 Difference]: With dead ends: 78 [2022-01-10 02:43:18,515 INFO L226 Difference]: Without dead ends: 57 [2022-01-10 02:43:18,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:43:18,516 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:18,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-01-10 02:43:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-10 02:43:18,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-10 02:43:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:43:18,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-01-10 02:43:18,521 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 41 [2022-01-10 02:43:18,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:18,521 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-01-10 02:43:18,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:18,521 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-01-10 02:43:18,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 02:43:18,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:18,522 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:18,531 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 02:43:18,729 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 02:43:18,729 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:18,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:18,730 INFO L85 PathProgramCache]: Analyzing trace with hash 528687572, now seen corresponding path program 1 times [2022-01-10 02:43:18,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:18,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829006408] [2022-01-10 02:43:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:43:18,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:18,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:18,731 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 02:43:18,732 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 02:43:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:43:18,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:43:18,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-01-10 02:43:18,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-01-10 02:43:18,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:18,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829006408] [2022-01-10 02:43:18,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829006408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:43:18,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:43:18,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:43:18,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138040349] [2022-01-10 02:43:18,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:43:18,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:43:18,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:18,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:43:18,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:43:18,943 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:19,004 INFO L93 Difference]: Finished difference Result 129 states and 181 transitions. [2022-01-10 02:43:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:43:19,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-10 02:43:19,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:19,005 INFO L225 Difference]: With dead ends: 129 [2022-01-10 02:43:19,005 INFO L226 Difference]: Without dead ends: 101 [2022-01-10 02:43:19,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:43:19,006 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:19,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 99 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:43:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-10 02:43:19,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2022-01-10 02:43:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.2604166666666667) internal successors, (121), 96 states have internal predecessors, (121), 0 states have call successors, (0), 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 02:43:19,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2022-01-10 02:43:19,015 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 42 [2022-01-10 02:43:19,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:19,015 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2022-01-10 02:43:19,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2022-01-10 02:43:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 02:43:19,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:19,016 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:19,025 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 02:43:19,223 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 02:43:19,224 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:19,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:19,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1925201000, now seen corresponding path program 2 times [2022-01-10 02:43:19,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:19,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906902201] [2022-01-10 02:43:19,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:43:19,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:19,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:19,226 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 02:43:19,227 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 02:43:19,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:43:19,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:43:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:43:19,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:19,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-10 02:43:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-01-10 02:43:19,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:19,633 INFO L353 Elim1Store]: treesize reduction 7, result has 36.4 percent of original size [2022-01-10 02:43:19,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2022-01-10 02:43:19,657 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-01-10 02:43:19,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:19,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906902201] [2022-01-10 02:43:19,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906902201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:43:19,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:43:19,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-10 02:43:19,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104534471] [2022-01-10 02:43:19,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:43:19,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:43:19,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:19,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:43:19,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:43:19,659 INFO L87 Difference]: Start difference. First operand 97 states and 121 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 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 02:43:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:20,292 INFO L93 Difference]: Finished difference Result 225 states and 288 transitions. [2022-01-10 02:43:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:43:20,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 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 51 [2022-01-10 02:43:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:20,293 INFO L225 Difference]: With dead ends: 225 [2022-01-10 02:43:20,293 INFO L226 Difference]: Without dead ends: 221 [2022-01-10 02:43:20,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-01-10 02:43:20,294 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 103 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:20,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 107 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:43:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-10 02:43:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 99. [2022-01-10 02:43:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 98 states have internal predecessors, (123), 0 states have call successors, (0), 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 02:43:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2022-01-10 02:43:20,303 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 51 [2022-01-10 02:43:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:20,303 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2022-01-10 02:43:20,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 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 02:43:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2022-01-10 02:43:20,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 02:43:20,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:20,304 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:20,313 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 02:43:20,507 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 02:43:20,507 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:20,508 INFO L85 PathProgramCache]: Analyzing trace with hash -390681093, now seen corresponding path program 1 times [2022-01-10 02:43:20,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:20,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9729075] [2022-01-10 02:43:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:43:20,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:20,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:20,509 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 02:43:20,510 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 02:43:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:43:20,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:43:20,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-10 02:43:20,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-10 02:43:20,739 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:20,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9729075] [2022-01-10 02:43:20,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9729075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:43:20,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:43:20,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 02:43:20,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966963511] [2022-01-10 02:43:20,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:43:20,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:43:20,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:20,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:43:20,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:43:20,740 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 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 02:43:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:20,893 INFO L93 Difference]: Finished difference Result 416 states and 541 transitions. [2022-01-10 02:43:20,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 02:43:20,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 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 52 [2022-01-10 02:43:20,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:20,895 INFO L225 Difference]: With dead ends: 416 [2022-01-10 02:43:20,895 INFO L226 Difference]: Without dead ends: 379 [2022-01-10 02:43:20,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:43:20,896 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 182 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:20,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 166 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:43:20,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-10 02:43:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 107. [2022-01-10 02:43:20,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2641509433962264) internal successors, (134), 106 states have internal predecessors, (134), 0 states have call successors, (0), 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 02:43:20,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2022-01-10 02:43:20,907 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 52 [2022-01-10 02:43:20,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:20,907 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2022-01-10 02:43:20,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 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 02:43:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2022-01-10 02:43:20,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 02:43:20,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:20,908 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:20,925 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 02:43:21,115 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 02:43:21,115 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:21,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:21,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1629149590, now seen corresponding path program 2 times [2022-01-10 02:43:21,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:21,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830650600] [2022-01-10 02:43:21,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:43:21,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:21,117 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 02:43:21,119 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 02:43:21,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:43:21,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:43:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:43:21,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-10 02:43:21,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-10 02:43:21,424 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:21,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830650600] [2022-01-10 02:43:21,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830650600] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:43:21,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:43:21,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 02:43:21,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596394036] [2022-01-10 02:43:21,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:43:21,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:43:21,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:21,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:43:21,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:43:21,425 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 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 02:43:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:21,907 INFO L93 Difference]: Finished difference Result 1107 states and 1454 transitions. [2022-01-10 02:43:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 02:43:21,908 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 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 58 [2022-01-10 02:43:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:21,910 INFO L225 Difference]: With dead ends: 1107 [2022-01-10 02:43:21,911 INFO L226 Difference]: Without dead ends: 1067 [2022-01-10 02:43:21,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2022-01-10 02:43:21,912 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 825 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:21,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 541 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:43:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-01-10 02:43:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 148. [2022-01-10 02:43:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.2925170068027212) internal successors, (190), 147 states have internal predecessors, (190), 0 states have call successors, (0), 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 02:43:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 190 transitions. [2022-01-10 02:43:21,937 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 190 transitions. Word has length 58 [2022-01-10 02:43:21,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:21,937 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 190 transitions. [2022-01-10 02:43:21,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 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 02:43:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 190 transitions. [2022-01-10 02:43:21,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 02:43:21,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:21,938 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:21,947 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 02:43:22,147 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 02:43:22,148 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:22,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1420720694, now seen corresponding path program 1 times [2022-01-10 02:43:22,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:22,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103173549] [2022-01-10 02:43:22,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:43:22,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:22,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:22,149 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 02:43:22,150 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 02:43:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:43:22,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:43:22,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-10 02:43:22,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-10 02:43:22,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:22,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103173549] [2022-01-10 02:43:22,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103173549] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:43:22,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:43:22,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 02:43:22,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257215447] [2022-01-10 02:43:22,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:43:22,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 02:43:22,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:22,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 02:43:22,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:43:22,450 INFO L87 Difference]: Start difference. First operand 148 states and 190 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 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 02:43:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:22,628 INFO L93 Difference]: Finished difference Result 298 states and 412 transitions. [2022-01-10 02:43:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:43:22,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 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 67 [2022-01-10 02:43:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:22,629 INFO L225 Difference]: With dead ends: 298 [2022-01-10 02:43:22,629 INFO L226 Difference]: Without dead ends: 224 [2022-01-10 02:43:22,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:43:22,630 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 124 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:22,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 241 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:43:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-10 02:43:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2022-01-10 02:43:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.3059360730593608) internal successors, (286), 219 states have internal predecessors, (286), 0 states have call successors, (0), 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 02:43:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 286 transitions. [2022-01-10 02:43:22,649 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 286 transitions. Word has length 67 [2022-01-10 02:43:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:22,649 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 286 transitions. [2022-01-10 02:43:22,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 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 02:43:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 286 transitions. [2022-01-10 02:43:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 02:43:22,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:22,650 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:22,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 02:43:22,857 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 02:43:22,857 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:22,858 INFO L85 PathProgramCache]: Analyzing trace with hash -965574840, now seen corresponding path program 3 times [2022-01-10 02:43:22,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:22,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836671166] [2022-01-10 02:43:22,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:43:22,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:22,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:22,859 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 02:43:22,860 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 02:43:22,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 02:43:22,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:43:22,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:43:22,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:23,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 02:43:23,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:43:23,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2022-01-10 02:43:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-01-10 02:43:23,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:43:23,179 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:23,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836671166] [2022-01-10 02:43:23,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836671166] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:43:23,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:43:23,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-10 02:43:23,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34513645] [2022-01-10 02:43:23,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:43:23,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 02:43:23,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:23,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 02:43:23,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-10 02:43:23,180 INFO L87 Difference]: Start difference. First operand 220 states and 286 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 02:43:23,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:23,264 INFO L93 Difference]: Finished difference Result 336 states and 438 transitions. [2022-01-10 02:43:23,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 02:43:23,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 82 [2022-01-10 02:43:23,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:23,267 INFO L225 Difference]: With dead ends: 336 [2022-01-10 02:43:23,267 INFO L226 Difference]: Without dead ends: 273 [2022-01-10 02:43:23,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:43:23,270 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:23,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 93 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 33 Unchecked, 0.0s Time] [2022-01-10 02:43:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-10 02:43:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 209. [2022-01-10 02:43:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.2980769230769231) internal successors, (270), 208 states have internal predecessors, (270), 0 states have call successors, (0), 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 02:43:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 270 transitions. [2022-01-10 02:43:23,303 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 270 transitions. Word has length 82 [2022-01-10 02:43:23,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:23,303 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 270 transitions. [2022-01-10 02:43:23,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 02:43:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 270 transitions. [2022-01-10 02:43:23,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 02:43:23,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:23,304 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:23,311 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 02:43:23,511 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 02:43:23,511 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:23,511 INFO L85 PathProgramCache]: Analyzing trace with hash 20519926, now seen corresponding path program 2 times [2022-01-10 02:43:23,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:23,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415275262] [2022-01-10 02:43:23,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:43:23,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:23,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:23,513 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 02:43:23,514 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 02:43:23,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:43:23,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:43:23,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 02:43:23,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-01-10 02:43:24,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-01-10 02:43:24,440 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:24,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415275262] [2022-01-10 02:43:24,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415275262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:43:24,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:43:24,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2022-01-10 02:43:24,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114562544] [2022-01-10 02:43:24,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:43:24,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-10 02:43:24,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-10 02:43:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2022-01-10 02:43:24,441 INFO L87 Difference]: Start difference. First operand 209 states and 270 transitions. Second operand has 31 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:26,157 INFO L93 Difference]: Finished difference Result 2228 states and 2884 transitions. [2022-01-10 02:43:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-10 02:43:26,157 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-01-10 02:43:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:26,163 INFO L225 Difference]: With dead ends: 2228 [2022-01-10 02:43:26,163 INFO L226 Difference]: Without dead ends: 2210 [2022-01-10 02:43:26,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 146 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=5272, Unknown=0, NotChecked=0, Total=5550 [2022-01-10 02:43:26,165 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 685 mSDsluCounter, 13284 mSDsCounter, 0 mSdLazyCounter, 2947 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 13838 SdHoareTripleChecker+Invalid, 3007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:26,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 13838 Invalid, 3007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2947 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 02:43:26,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2022-01-10 02:43:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 770. [2022-01-10 02:43:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.328998699609883) internal successors, (1022), 769 states have internal predecessors, (1022), 0 states have call successors, (0), 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 02:43:26,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1022 transitions. [2022-01-10 02:43:26,255 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1022 transitions. Word has length 91 [2022-01-10 02:43:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:26,255 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1022 transitions. [2022-01-10 02:43:26,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 31 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:43:26,256 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1022 transitions. [2022-01-10 02:43:26,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 02:43:26,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:26,257 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:26,268 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 02:43:26,466 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 02:43:26,466 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:26,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash 700578296, now seen corresponding path program 1 times [2022-01-10 02:43:26,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:26,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738396132] [2022-01-10 02:43:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:43:26,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:26,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:26,468 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 02:43:26,470 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 02:43:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:43:26,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-10 02:43:26,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:28,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:43:28,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-01-10 02:43:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 261 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 02:43:28,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:30,612 INFO L353 Elim1Store]: treesize reduction 10, result has 89.0 percent of original size [2022-01-10 02:43:30,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 96 [2022-01-10 02:43:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 170 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-01-10 02:43:31,047 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:31,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738396132] [2022-01-10 02:43:31,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738396132] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:43:31,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:43:31,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 24] total 52 [2022-01-10 02:43:31,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591920853] [2022-01-10 02:43:31,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:43:31,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-10 02:43:31,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:31,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-10 02:43:31,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2022-01-10 02:43:31,051 INFO L87 Difference]: Start difference. First operand 770 states and 1022 transitions. Second operand has 52 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 0 states have call successors, (0), 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 02:43:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:34,699 INFO L93 Difference]: Finished difference Result 8816 states and 11887 transitions. [2022-01-10 02:43:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-10 02:43:34,700 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 0 states have call successors, (0), 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 91 [2022-01-10 02:43:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:34,718 INFO L225 Difference]: With dead ends: 8816 [2022-01-10 02:43:34,718 INFO L226 Difference]: Without dead ends: 8532 [2022-01-10 02:43:34,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=315, Invalid=3225, Unknown=0, NotChecked=0, Total=3540 [2022-01-10 02:43:34,720 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 700 mSDsluCounter, 2651 mSDsCounter, 0 mSdLazyCounter, 2862 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 4609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1621 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:34,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 2774 Invalid, 4609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2862 Invalid, 0 Unknown, 1621 Unchecked, 2.1s Time] [2022-01-10 02:43:34,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8532 states. [2022-01-10 02:43:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8532 to 1408. [2022-01-10 02:43:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 1.3326226012793176) internal successors, (1875), 1407 states have internal predecessors, (1875), 0 states have call successors, (0), 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 02:43:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 1875 transitions. [2022-01-10 02:43:34,916 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 1875 transitions. Word has length 91 [2022-01-10 02:43:34,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:34,916 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 1875 transitions. [2022-01-10 02:43:34,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8653846153846154) internal successors, (149), 52 states have internal predecessors, (149), 0 states have call successors, (0), 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 02:43:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 1875 transitions. [2022-01-10 02:43:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 02:43:34,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:34,919 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:34,927 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 02:43:35,127 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 02:43:35,127 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:35,128 INFO L85 PathProgramCache]: Analyzing trace with hash 278685364, now seen corresponding path program 2 times [2022-01-10 02:43:35,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:35,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155424811] [2022-01-10 02:43:35,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:43:35,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:35,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:35,129 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 02:43:35,130 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 02:43:35,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:43:35,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:43:35,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 02:43:35,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:36,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:43:36,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-01-10 02:43:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 35 proven. 232 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 02:43:36,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:38,904 INFO L353 Elim1Store]: treesize reduction 10, result has 89.0 percent of original size [2022-01-10 02:43:38,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 96 [2022-01-10 02:43:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 36 proven. 147 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-01-10 02:43:39,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:39,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155424811] [2022-01-10 02:43:39,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155424811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:43:39,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:43:39,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 47 [2022-01-10 02:43:39,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402559918] [2022-01-10 02:43:39,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:43:39,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-10 02:43:39,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:39,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-10 02:43:39,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1940, Unknown=0, NotChecked=0, Total=2162 [2022-01-10 02:43:39,386 INFO L87 Difference]: Start difference. First operand 1408 states and 1875 transitions. Second operand has 47 states, 47 states have (on average 3.0) internal successors, (141), 47 states have internal predecessors, (141), 0 states have call successors, (0), 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 02:43:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:43,182 INFO L93 Difference]: Finished difference Result 11206 states and 15116 transitions. [2022-01-10 02:43:43,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 02:43:43,183 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.0) internal successors, (141), 47 states have internal predecessors, (141), 0 states have call successors, (0), 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 91 [2022-01-10 02:43:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:43,205 INFO L225 Difference]: With dead ends: 11206 [2022-01-10 02:43:43,205 INFO L226 Difference]: Without dead ends: 10895 [2022-01-10 02:43:43,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=282, Invalid=2580, Unknown=0, NotChecked=0, Total=2862 [2022-01-10 02:43:43,207 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 720 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 2125 SdHoareTripleChecker+Invalid, 3654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1171 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:43,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 2125 Invalid, 3654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2355 Invalid, 0 Unknown, 1171 Unchecked, 1.8s Time] [2022-01-10 02:43:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10895 states. [2022-01-10 02:43:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10895 to 2379. [2022-01-10 02:43:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 1.3305298570227082) internal successors, (3164), 2378 states have internal predecessors, (3164), 0 states have call successors, (0), 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 02:43:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 3164 transitions. [2022-01-10 02:43:43,606 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 3164 transitions. Word has length 91 [2022-01-10 02:43:43,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:43,606 INFO L470 AbstractCegarLoop]: Abstraction has 2379 states and 3164 transitions. [2022-01-10 02:43:43,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.0) internal successors, (141), 47 states have internal predecessors, (141), 0 states have call successors, (0), 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 02:43:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 3164 transitions. [2022-01-10 02:43:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 02:43:43,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:43,610 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:43,635 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 02:43:43,819 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 02:43:43,819 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:43,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:43,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1259343752, now seen corresponding path program 3 times [2022-01-10 02:43:43,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:43,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171863998] [2022-01-10 02:43:43,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:43:43,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:43,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:43,821 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 02:43:43,821 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 02:43:43,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-10 02:43:43,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:43:44,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 02:43:44,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:44,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:43:44,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 56 [2022-01-10 02:43:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-01-10 02:43:46,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:53,725 INFO L353 Elim1Store]: treesize reduction 52, result has 40.9 percent of original size [2022-01-10 02:43:53,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 51 [2022-01-10 02:43:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-01-10 02:43:53,852 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:43:53,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171863998] [2022-01-10 02:43:53,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171863998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:43:53,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:43:53,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-01-10 02:43:53,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210394580] [2022-01-10 02:43:53,853 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:43:53,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 02:43:53,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:43:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 02:43:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=583, Unknown=5, NotChecked=0, Total=702 [2022-01-10 02:43:53,854 INFO L87 Difference]: Start difference. First operand 2379 states and 3164 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 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 02:43:56,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:43:56,521 INFO L93 Difference]: Finished difference Result 4927 states and 6455 transitions. [2022-01-10 02:43:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 02:43:56,522 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 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 91 [2022-01-10 02:43:56,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:43:56,532 INFO L225 Difference]: With dead ends: 4927 [2022-01-10 02:43:56,532 INFO L226 Difference]: Without dead ends: 4839 [2022-01-10 02:43:56,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=275, Invalid=1052, Unknown=5, NotChecked=0, Total=1332 [2022-01-10 02:43:56,534 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:43:56,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 195 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 70 Invalid, 0 Unknown, 156 Unchecked, 0.1s Time] [2022-01-10 02:43:56,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2022-01-10 02:43:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 3301. [2022-01-10 02:43:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3301 states, 3300 states have (on average 1.337878787878788) internal successors, (4415), 3300 states have internal predecessors, (4415), 0 states have call successors, (0), 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 02:43:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3301 states to 3301 states and 4415 transitions. [2022-01-10 02:43:57,123 INFO L78 Accepts]: Start accepts. Automaton has 3301 states and 4415 transitions. Word has length 91 [2022-01-10 02:43:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:43:57,123 INFO L470 AbstractCegarLoop]: Abstraction has 3301 states and 4415 transitions. [2022-01-10 02:43:57,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 27 states have internal predecessors, (77), 0 states have call successors, (0), 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 02:43:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3301 states and 4415 transitions. [2022-01-10 02:43:57,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 02:43:57,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:43:57,130 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:43:57,141 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 02:43:57,338 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 02:43:57,338 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:43:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:43:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1973624780, now seen corresponding path program 4 times [2022-01-10 02:43:57,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:43:57,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107651917] [2022-01-10 02:43:57,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:43:57,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:43:57,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:43:57,340 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 02:43:57,340 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 02:43:57,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:43:57,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:43:57,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 02:43:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:43:58,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 02:43:58,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-01-10 02:43:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 53 proven. 168 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-10 02:43:58,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:43:59,989 INFO L353 Elim1Store]: treesize reduction 10, result has 89.0 percent of original size [2022-01-10 02:43:59,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 96 [2022-01-10 02:44:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 56 proven. 101 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-10 02:44:00,437 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:44:00,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107651917] [2022-01-10 02:44:00,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107651917] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:44:00,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:44:00,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2022-01-10 02:44:00,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848643852] [2022-01-10 02:44:00,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:44:00,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-10 02:44:00,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:44:00,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-10 02:44:00,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 02:44:00,439 INFO L87 Difference]: Start difference. First operand 3301 states and 4415 transitions. Second operand has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 37 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:44:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:44:04,184 INFO L93 Difference]: Finished difference Result 14554 states and 19549 transitions. [2022-01-10 02:44:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 02:44:04,185 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 37 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-01-10 02:44:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:44:04,204 INFO L225 Difference]: With dead ends: 14554 [2022-01-10 02:44:04,205 INFO L226 Difference]: Without dead ends: 14087 [2022-01-10 02:44:04,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=216, Invalid=1506, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 02:44:04,208 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 470 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:44:04,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 1170 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1436 Invalid, 0 Unknown, 452 Unchecked, 1.1s Time] [2022-01-10 02:44:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14087 states. [2022-01-10 02:44:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14087 to 5613. [2022-01-10 02:44:05,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5613 states, 5612 states have (on average 1.3369565217391304) internal successors, (7503), 5612 states have internal predecessors, (7503), 0 states have call successors, (0), 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 02:44:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5613 states to 5613 states and 7503 transitions. [2022-01-10 02:44:05,243 INFO L78 Accepts]: Start accepts. Automaton has 5613 states and 7503 transitions. Word has length 91 [2022-01-10 02:44:05,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:44:05,243 INFO L470 AbstractCegarLoop]: Abstraction has 5613 states and 7503 transitions. [2022-01-10 02:44:05,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 37 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:44:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 5613 states and 7503 transitions. [2022-01-10 02:44:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 02:44:05,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:44:05,252 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:44:05,263 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 02:44:05,461 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 02:44:05,461 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:44:05,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:44:05,461 INFO L85 PathProgramCache]: Analyzing trace with hash 443221752, now seen corresponding path program 5 times [2022-01-10 02:44:05,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:44:05,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763295140] [2022-01-10 02:44:05,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:44:05,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:44:05,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:44:05,463 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 02:44:05,464 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 02:44:06,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-10 02:44:06,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:44:06,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-10 02:44:06,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:44:23,439 INFO L353 Elim1Store]: treesize reduction 531, result has 47.1 percent of original size [2022-01-10 02:44:23,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 208 treesize of output 537