/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/recursive-simple/fibo_2calls_20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:38:09,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:38:09,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:38:09,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:38:09,166 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 06:38:09,189 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:38:09,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:38:09,189 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:38:09,189 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:38:09,190 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:38:09,190 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:38:09,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:38:09,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:38:09,191 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:38:09,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:38:09,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:38:09,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:38:09,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:38:09,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:38:09,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:38:09,192 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:38:09,192 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:38:09,192 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:38:09,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:38:09,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:38:09,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:38:09,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:38:09,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:38:09,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:38:09,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:38:09,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:38:09,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:38:09,193 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:38:09,193 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:38:09,193 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:38:09,193 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:38:09,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:38:09,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:38:09,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:38:09,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:38:09,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:38:09,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:38:09,445 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:38:09,445 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:38:09,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c [2022-01-10 06:38:09,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84cb9ac02/4009797494fb4d42b222ac3ab03177db/FLAG39105b32b [2022-01-10 06:38:09,969 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:38:09,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c [2022-01-10 06:38:09,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84cb9ac02/4009797494fb4d42b222ac3ab03177db/FLAG39105b32b [2022-01-10 06:38:10,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84cb9ac02/4009797494fb4d42b222ac3ab03177db [2022-01-10 06:38:10,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:38:10,423 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:38:10,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:38:10,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:38:10,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:38:10,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:38:10" (1/1) ... [2022-01-10 06:38:10,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@563881cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10, skipping insertion in model container [2022-01-10 06:38:10,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:38:10" (1/1) ... [2022-01-10 06:38:10,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:38:10,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:38:10,577 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c[951,964] [2022-01-10 06:38:10,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:38:10,588 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:38:10,599 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c[951,964] [2022-01-10 06:38:10,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:38:10,607 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:38:10,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10 WrapperNode [2022-01-10 06:38:10,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:38:10,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:38:10,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:38:10,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:38:10,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10" (1/1) ... [2022-01-10 06:38:10,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10" (1/1) ... [2022-01-10 06:38:10,627 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 06:38:10,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:38:10,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:38:10,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:38:10,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:38:10,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10" (1/1) ... [2022-01-10 06:38:10,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10" (1/1) ... [2022-01-10 06:38:10,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10" (1/1) ... [2022-01-10 06:38:10,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10" (1/1) ... [2022-01-10 06:38:10,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10" (1/1) ... [2022-01-10 06:38:10,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10" (1/1) ... [2022-01-10 06:38:10,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10" (1/1) ... [2022-01-10 06:38:10,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:38:10,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:38:10,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:38:10,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:38:10,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10" (1/1) ... [2022-01-10 06:38:10,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:38:10,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:38:10,671 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 06:38:10,674 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 06:38:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:38:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:38:10,703 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-01-10 06:38:10,704 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-01-10 06:38:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-01-10 06:38:10,704 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-01-10 06:38:10,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:38:10,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:38:10,766 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:38:10,767 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:38:10,894 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:38:10,898 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:38:10,898 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:38:10,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:38:10 BoogieIcfgContainer [2022-01-10 06:38:10,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:38:10,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:38:10,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:38:10,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:38:10,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:38:10" (1/3) ... [2022-01-10 06:38:10,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700e5bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:38:10, skipping insertion in model container [2022-01-10 06:38:10,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:38:10" (2/3) ... [2022-01-10 06:38:10,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700e5bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:38:10, skipping insertion in model container [2022-01-10 06:38:10,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:38:10" (3/3) ... [2022-01-10 06:38:10,928 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.c [2022-01-10 06:38:10,931 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:38:10,931 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:38:10,962 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:38:10,967 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 06:38:10,967 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:38:10,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:38:10,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 06:38:10,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:10,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:10,985 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:10,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:10,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1014607960, now seen corresponding path program 1 times [2022-01-10 06:38:10,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:10,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779294248] [2022-01-10 06:38:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:10,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:10,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:10,999 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 06:38:11,059 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 06:38:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:11,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:38:11,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:11,192 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 06:38:11,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:38:11,193 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:11,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779294248] [2022-01-10 06:38:11,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779294248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:38:11,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:38:11,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:38:11,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960959027] [2022-01-10 06:38:11,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:38:11,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:38:11,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:11,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:38:11,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:38:11,226 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:38:11,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:11,296 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-01-10 06:38:11,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:38:11,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 06:38:11,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:11,305 INFO L225 Difference]: With dead ends: 37 [2022-01-10 06:38:11,305 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 06:38:11,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:38:11,310 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:11,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 82 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:38:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 06:38:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 06:38:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 06:38:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 06:38:11,348 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2022-01-10 06:38:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:11,349 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 06:38:11,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:38:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 06:38:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 06:38:11,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:11,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:11,359 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 06:38:11,556 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 06:38:11,557 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:11,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:11,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2131805067, now seen corresponding path program 1 times [2022-01-10 06:38:11,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:11,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846107246] [2022-01-10 06:38:11,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:11,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:11,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:11,560 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 06:38:11,561 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 06:38:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:11,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:38:11,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:11,611 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 06:38:11,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:38:11,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:11,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846107246] [2022-01-10 06:38:11,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846107246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:38:11,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:38:11,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:38:11,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066099024] [2022-01-10 06:38:11,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:38:11,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:38:11,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:11,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:38:11,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:38:11,613 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:38:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:11,652 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-10 06:38:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:38:11,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 06:38:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:11,653 INFO L225 Difference]: With dead ends: 31 [2022-01-10 06:38:11,653 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 06:38:11,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:38:11,654 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:11,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:38:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 06:38:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-10 06:38:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 06:38:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 06:38:11,659 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2022-01-10 06:38:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:11,659 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 06:38:11,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:38:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 06:38:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 06:38:11,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:11,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:11,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:11,878 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 06:38:11,878 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:11,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1494555912, now seen corresponding path program 1 times [2022-01-10 06:38:11,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:11,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026504858] [2022-01-10 06:38:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:11,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:11,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:11,895 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 06:38:11,896 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 06:38:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:11,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:38:11,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:38:12,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:38:12,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:12,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026504858] [2022-01-10 06:38:12,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026504858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:12,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:12,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-10 06:38:12,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526783824] [2022-01-10 06:38:12,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:12,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:38:12,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:12,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:38:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:38:12,203 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:38:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:12,320 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-01-10 06:38:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:38:12,321 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 22 [2022-01-10 06:38:12,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:12,322 INFO L225 Difference]: With dead ends: 37 [2022-01-10 06:38:12,322 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 06:38:12,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:12,323 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:12,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 96 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:12,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 06:38:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-01-10 06:38:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-10 06:38:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-10 06:38:12,328 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2022-01-10 06:38:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:12,329 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-10 06:38:12,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:38:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-10 06:38:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 06:38:12,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:12,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:12,352 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 06:38:12,536 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 06:38:12,536 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash 814571350, now seen corresponding path program 1 times [2022-01-10 06:38:12,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:12,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813370514] [2022-01-10 06:38:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:12,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:12,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:12,540 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 06:38:12,541 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 06:38:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:12,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:38:12,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:38:12,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:38:12,798 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:12,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813370514] [2022-01-10 06:38:12,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813370514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:12,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:12,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-10 06:38:12,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510542739] [2022-01-10 06:38:12,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:12,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:38:12,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:38:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:38:12,800 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:38:12,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:12,906 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2022-01-10 06:38:12,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:38:12,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 23 [2022-01-10 06:38:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:12,907 INFO L225 Difference]: With dead ends: 61 [2022-01-10 06:38:12,907 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 06:38:12,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:12,909 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:12,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 115 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:12,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 06:38:12,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-01-10 06:38:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-10 06:38:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-01-10 06:38:12,915 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 23 [2022-01-10 06:38:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:12,916 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-01-10 06:38:12,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 06:38:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2022-01-10 06:38:12,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 06:38:12,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:12,917 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:12,934 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 06:38:13,123 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 06:38:13,124 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:13,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:13,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1581983960, now seen corresponding path program 1 times [2022-01-10 06:38:13,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:13,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486906894] [2022-01-10 06:38:13,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:13,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:13,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:13,126 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 06:38:13,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:38:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:13,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:38:13,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:38:13,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:38:13,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:13,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486906894] [2022-01-10 06:38:13,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486906894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:13,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:13,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-01-10 06:38:13,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367813030] [2022-01-10 06:38:13,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:13,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:38:13,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:13,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:38:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:13,628 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:38:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:13,835 INFO L93 Difference]: Finished difference Result 49 states and 78 transitions. [2022-01-10 06:38:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:38:13,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) Word has length 34 [2022-01-10 06:38:13,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:13,839 INFO L225 Difference]: With dead ends: 49 [2022-01-10 06:38:13,839 INFO L226 Difference]: Without dead ends: 45 [2022-01-10 06:38:13,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:38:13,840 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:13,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 153 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-10 06:38:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-01-10 06:38:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (21), 10 states have call predecessors, (21), 8 states have call successors, (21) [2022-01-10 06:38:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 54 transitions. [2022-01-10 06:38:13,857 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 54 transitions. Word has length 34 [2022-01-10 06:38:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:13,857 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 54 transitions. [2022-01-10 06:38:13,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:38:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 54 transitions. [2022-01-10 06:38:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 06:38:13,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:13,859 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:13,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:14,070 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 06:38:14,070 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:14,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:14,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1656487097, now seen corresponding path program 1 times [2022-01-10 06:38:14,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:14,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758222721] [2022-01-10 06:38:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:14,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:14,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:14,074 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 06:38:14,075 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 06:38:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:14,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:38:14,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:38:14,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:38:14,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:14,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758222721] [2022-01-10 06:38:14,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758222721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:14,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:14,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-01-10 06:38:14,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108693351] [2022-01-10 06:38:14,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:14,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:38:14,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:14,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:38:14,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:14,496 INFO L87 Difference]: Start difference. First operand 36 states and 54 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:38:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:14,638 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2022-01-10 06:38:14,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:38:14,638 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) Word has length 35 [2022-01-10 06:38:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:14,639 INFO L225 Difference]: With dead ends: 79 [2022-01-10 06:38:14,639 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 06:38:14,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:38:14,640 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:14,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 152 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 06:38:14,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-10 06:38:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 10 states have call successors, (10), 2 states have call predecessors, (10), 9 states have return successors, (37), 14 states have call predecessors, (37), 10 states have call successors, (37) [2022-01-10 06:38:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2022-01-10 06:38:14,648 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 35 [2022-01-10 06:38:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:14,648 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2022-01-10 06:38:14,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 06:38:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2022-01-10 06:38:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 06:38:14,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:14,649 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:14,657 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 06:38:14,855 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 06:38:14,856 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash 600804856, now seen corresponding path program 2 times [2022-01-10 06:38:14,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:14,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579947135] [2022-01-10 06:38:14,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:14,857 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:14,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:14,858 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 06:38:14,859 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 06:38:14,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:14,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:14,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:38:14,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 06:38:15,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:38:15,518 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:15,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579947135] [2022-01-10 06:38:15,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579947135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:15,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:15,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2022-01-10 06:38:15,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269980910] [2022-01-10 06:38:15,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:15,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:38:15,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:15,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:38:15,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:38:15,519 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-10 06:38:15,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:15,794 INFO L93 Difference]: Finished difference Result 70 states and 142 transitions. [2022-01-10 06:38:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:38:15,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) Word has length 46 [2022-01-10 06:38:15,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:15,796 INFO L225 Difference]: With dead ends: 70 [2022-01-10 06:38:15,796 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 06:38:15,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:38:15,797 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:15,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 156 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 06:38:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2022-01-10 06:38:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 11 states have call successors, (11), 2 states have call predecessors, (11), 10 states have return successors, (47), 16 states have call predecessors, (47), 11 states have call successors, (47) [2022-01-10 06:38:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 90 transitions. [2022-01-10 06:38:15,814 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 90 transitions. Word has length 46 [2022-01-10 06:38:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:15,814 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 90 transitions. [2022-01-10 06:38:15,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 14 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-10 06:38:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 90 transitions. [2022-01-10 06:38:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 06:38:15,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:15,816 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:15,824 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 06:38:16,022 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 06:38:16,022 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:16,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:16,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1482129412, now seen corresponding path program 1 times [2022-01-10 06:38:16,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:16,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813834249] [2022-01-10 06:38:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:16,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:16,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:16,025 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 06:38:16,026 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 06:38:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:16,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:38:16,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 06:38:16,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 06:38:16,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813834249] [2022-01-10 06:38:16,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813834249] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:16,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:16,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2022-01-10 06:38:16,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31080224] [2022-01-10 06:38:16,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:16,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:38:16,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:38:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:38:16,496 INFO L87 Difference]: Start difference. First operand 50 states and 90 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-10 06:38:16,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:16,661 INFO L93 Difference]: Finished difference Result 108 states and 252 transitions. [2022-01-10 06:38:16,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:38:16,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) Word has length 47 [2022-01-10 06:38:16,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:16,662 INFO L225 Difference]: With dead ends: 108 [2022-01-10 06:38:16,663 INFO L226 Difference]: Without dead ends: 61 [2022-01-10 06:38:16,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:16,664 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:16,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 208 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:16,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-10 06:38:16,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-01-10 06:38:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (69), 21 states have call predecessors, (69), 13 states have call successors, (69) [2022-01-10 06:38:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2022-01-10 06:38:16,672 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 47 [2022-01-10 06:38:16,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:16,673 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2022-01-10 06:38:16,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 14 states have internal predecessors, (38), 10 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 4 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-10 06:38:16,673 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2022-01-10 06:38:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 06:38:16,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:16,674 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:16,689 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 06:38:16,885 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 06:38:16,885 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:16,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:16,886 INFO L85 PathProgramCache]: Analyzing trace with hash -425933224, now seen corresponding path program 3 times [2022-01-10 06:38:16,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:16,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674263004] [2022-01-10 06:38:16,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:16,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:16,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:16,899 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 06:38:16,912 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 06:38:16,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 06:38:16,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:16,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:38:16,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 06:38:17,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-10 06:38:17,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674263004] [2022-01-10 06:38:17,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674263004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:17,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:17,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-01-10 06:38:17,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660158961] [2022-01-10 06:38:17,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:17,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 06:38:17,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:17,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 06:38:17,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-10 06:38:17,301 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 06:38:17,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:17,409 INFO L93 Difference]: Finished difference Result 83 states and 163 transitions. [2022-01-10 06:38:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:38:17,409 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 58 [2022-01-10 06:38:17,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:17,410 INFO L225 Difference]: With dead ends: 83 [2022-01-10 06:38:17,410 INFO L226 Difference]: Without dead ends: 79 [2022-01-10 06:38:17,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:17,411 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:17,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 100 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-10 06:38:17,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2022-01-10 06:38:17,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 2 states have call predecessors, (13), 13 states have return successors, (69), 21 states have call predecessors, (69), 13 states have call successors, (69) [2022-01-10 06:38:17,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2022-01-10 06:38:17,421 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 58 [2022-01-10 06:38:17,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:17,422 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2022-01-10 06:38:17,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 06:38:17,422 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2022-01-10 06:38:17,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:38:17,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:17,423 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:17,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-01-10 06:38:17,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:17,632 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash -354787678, now seen corresponding path program 2 times [2022-01-10 06:38:17,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:17,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180382035] [2022-01-10 06:38:17,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:17,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:17,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:17,634 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 06:38:17,637 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 06:38:17,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:17,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:17,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:38:17,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 06:38:17,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 06:38:18,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:18,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180382035] [2022-01-10 06:38:18,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180382035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:18,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:18,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2022-01-10 06:38:18,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602385589] [2022-01-10 06:38:18,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:18,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:38:18,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:18,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:38:18,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:38:18,597 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 5 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-10 06:38:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:19,163 INFO L93 Difference]: Finished difference Result 163 states and 460 transitions. [2022-01-10 06:38:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:38:19,164 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 5 states have call predecessors, (14), 12 states have call successors, (14) Word has length 59 [2022-01-10 06:38:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:19,165 INFO L225 Difference]: With dead ends: 163 [2022-01-10 06:38:19,165 INFO L226 Difference]: Without dead ends: 105 [2022-01-10 06:38:19,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:38:19,167 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:19,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 181 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:38:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-10 06:38:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2022-01-10 06:38:19,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 60 states have internal predecessors, (62), 20 states have call successors, (20), 5 states have call predecessors, (20), 22 states have return successors, (150), 33 states have call predecessors, (150), 20 states have call successors, (150) [2022-01-10 06:38:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 232 transitions. [2022-01-10 06:38:19,180 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 232 transitions. Word has length 59 [2022-01-10 06:38:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:19,180 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 232 transitions. [2022-01-10 06:38:19,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (12), 1 states have call predecessors, (12), 6 states have return successors, (14), 5 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-10 06:38:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 232 transitions. [2022-01-10 06:38:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 06:38:19,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:19,182 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:19,192 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 06:38:19,388 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 06:38:19,388 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:19,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1748552912, now seen corresponding path program 2 times [2022-01-10 06:38:19,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:19,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747239864] [2022-01-10 06:38:19,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:19,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:19,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:19,390 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 06:38:19,391 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 06:38:19,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:19,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:19,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:38:19,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 59 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-10 06:38:19,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 12 proven. 69 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-10 06:38:20,156 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:20,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747239864] [2022-01-10 06:38:20,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747239864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:20,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:20,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2022-01-10 06:38:20,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275656243] [2022-01-10 06:38:20,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:20,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 06:38:20,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:20,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 06:38:20,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:38:20,159 INFO L87 Difference]: Start difference. First operand 99 states and 232 transitions. Second operand has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 16 states have internal predecessors, (48), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 6 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:38:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:20,343 INFO L93 Difference]: Finished difference Result 209 states and 648 transitions. [2022-01-10 06:38:20,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:38:20,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 16 states have internal predecessors, (48), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 6 states have call predecessors, (16), 13 states have call successors, (16) Word has length 72 [2022-01-10 06:38:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:20,345 INFO L225 Difference]: With dead ends: 209 [2022-01-10 06:38:20,345 INFO L226 Difference]: Without dead ends: 113 [2022-01-10 06:38:20,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:38:20,347 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:20,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 194 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-10 06:38:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2022-01-10 06:38:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 62 states have (on average 1.096774193548387) internal successors, (68), 66 states have internal predecessors, (68), 22 states have call successors, (22), 5 states have call predecessors, (22), 25 states have return successors, (186), 38 states have call predecessors, (186), 22 states have call successors, (186) [2022-01-10 06:38:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 276 transitions. [2022-01-10 06:38:20,367 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 276 transitions. Word has length 72 [2022-01-10 06:38:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:20,368 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 276 transitions. [2022-01-10 06:38:20,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 16 states have internal predecessors, (48), 13 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (16), 6 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-10 06:38:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 276 transitions. [2022-01-10 06:38:20,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 06:38:20,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:20,373 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:20,380 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 06:38:20,582 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 06:38:20,583 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:20,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:20,583 INFO L85 PathProgramCache]: Analyzing trace with hash -971041873, now seen corresponding path program 3 times [2022-01-10 06:38:20,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:20,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297990760] [2022-01-10 06:38:20,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:20,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:20,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:20,585 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 06:38:20,593 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 06:38:20,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:38:20,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:20,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:38:20,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 229 proven. 5 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-01-10 06:38:20,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 169 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-01-10 06:38:21,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297990760] [2022-01-10 06:38:21,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297990760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:21,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:21,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-10 06:38:21,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110985599] [2022-01-10 06:38:21,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:21,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 06:38:21,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:21,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 06:38:21,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:38:21,596 INFO L87 Difference]: Start difference. First operand 110 states and 276 transitions. Second operand has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) [2022-01-10 06:38:21,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:21,809 INFO L93 Difference]: Finished difference Result 223 states and 708 transitions. [2022-01-10 06:38:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:38:21,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) Word has length 131 [2022-01-10 06:38:21,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:21,811 INFO L225 Difference]: With dead ends: 223 [2022-01-10 06:38:21,811 INFO L226 Difference]: Without dead ends: 116 [2022-01-10 06:38:21,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:38:21,813 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:21,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 150 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:21,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-10 06:38:21,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-01-10 06:38:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 70 states have internal predecessors, (72), 22 states have call successors, (22), 5 states have call predecessors, (22), 27 states have return successors, (179), 40 states have call predecessors, (179), 22 states have call successors, (179) [2022-01-10 06:38:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 273 transitions. [2022-01-10 06:38:21,845 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 273 transitions. Word has length 131 [2022-01-10 06:38:21,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:21,845 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 273 transitions. [2022-01-10 06:38:21,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (15), 2 states have call predecessors, (15), 6 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) [2022-01-10 06:38:21,846 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 273 transitions. [2022-01-10 06:38:21,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-10 06:38:21,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:21,847 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:21,856 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 06:38:22,054 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 06:38:22,054 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:22,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1871760231, now seen corresponding path program 1 times [2022-01-10 06:38:22,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:22,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560660753] [2022-01-10 06:38:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:38:22,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:22,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:22,064 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 06:38:22,066 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 06:38:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:22,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:38:22,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-10 06:38:22,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 21 proven. 147 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-10 06:38:23,220 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:23,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560660753] [2022-01-10 06:38:23,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560660753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:23,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:23,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2022-01-10 06:38:23,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154611517] [2022-01-10 06:38:23,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:23,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:38:23,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:23,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:38:23,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:23,221 INFO L87 Difference]: Start difference. First operand 116 states and 273 transitions. Second operand has 18 states, 16 states have (on average 3.4375) internal successors, (55), 18 states have internal predecessors, (55), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2022-01-10 06:38:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:24,120 INFO L93 Difference]: Finished difference Result 324 states and 1037 transitions. [2022-01-10 06:38:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 06:38:24,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 18 states have internal predecessors, (55), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) Word has length 109 [2022-01-10 06:38:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:24,126 INFO L225 Difference]: With dead ends: 324 [2022-01-10 06:38:24,126 INFO L226 Difference]: Without dead ends: 209 [2022-01-10 06:38:24,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 06:38:24,129 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:24,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 240 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:38:24,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-10 06:38:24,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 194. [2022-01-10 06:38:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 114 states have (on average 1.105263157894737) internal successors, (126), 118 states have internal predecessors, (126), 35 states have call successors, (35), 13 states have call predecessors, (35), 44 states have return successors, (328), 62 states have call predecessors, (328), 35 states have call successors, (328) [2022-01-10 06:38:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 489 transitions. [2022-01-10 06:38:24,151 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 489 transitions. Word has length 109 [2022-01-10 06:38:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:24,151 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 489 transitions. [2022-01-10 06:38:24,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.4375) internal successors, (55), 18 states have internal predecessors, (55), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2022-01-10 06:38:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 489 transitions. [2022-01-10 06:38:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 06:38:24,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:24,154 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:24,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 06:38:24,362 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 06:38:24,362 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:24,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:24,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1266739771, now seen corresponding path program 2 times [2022-01-10 06:38:24,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:24,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160973169] [2022-01-10 06:38:24,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:24,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:24,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:24,367 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 06:38:24,370 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 06:38:24,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:24,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:24,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:38:24,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 51 proven. 191 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2022-01-10 06:38:24,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 51 proven. 207 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-01-10 06:38:25,490 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:25,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160973169] [2022-01-10 06:38:25,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160973169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:25,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:25,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2022-01-10 06:38:25,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587808327] [2022-01-10 06:38:25,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:25,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 06:38:25,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:25,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 06:38:25,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:25,492 INFO L87 Difference]: Start difference. First operand 194 states and 489 transitions. Second operand has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2022-01-10 06:38:25,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:25,744 INFO L93 Difference]: Finished difference Result 406 states and 1364 transitions. [2022-01-10 06:38:25,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:38:25,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) Word has length 145 [2022-01-10 06:38:25,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:25,748 INFO L225 Difference]: With dead ends: 406 [2022-01-10 06:38:25,748 INFO L226 Difference]: Without dead ends: 215 [2022-01-10 06:38:25,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 270 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:38:25,750 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:25,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 270 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-10 06:38:25,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-01-10 06:38:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 130 states have internal predecessors, (138), 38 states have call successors, (38), 13 states have call predecessors, (38), 50 states have return successors, (417), 71 states have call predecessors, (417), 38 states have call successors, (417) [2022-01-10 06:38:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 593 transitions. [2022-01-10 06:38:25,770 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 593 transitions. Word has length 145 [2022-01-10 06:38:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:25,770 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 593 transitions. [2022-01-10 06:38:25,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 15 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 7 states have call predecessors, (21), 15 states have call successors, (21) [2022-01-10 06:38:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 593 transitions. [2022-01-10 06:38:25,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-10 06:38:25,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:25,777 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 22, 22, 20, 15, 14, 14, 14, 14, 14, 14, 14, 11, 11, 11, 11, 11, 11, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:25,798 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 06:38:25,983 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 06:38:25,983 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:25,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:25,984 INFO L85 PathProgramCache]: Analyzing trace with hash -769042422, now seen corresponding path program 3 times [2022-01-10 06:38:25,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:25,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305009335] [2022-01-10 06:38:25,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:25,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:25,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:25,985 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 06:38:25,987 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 06:38:26,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 06:38:26,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:26,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:38:26,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 411 proven. 2 refuted. 0 times theorem prover too weak. 2868 trivial. 0 not checked. [2022-01-10 06:38:26,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 413 proven. 1 refuted. 0 times theorem prover too weak. 2867 trivial. 0 not checked. [2022-01-10 06:38:27,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:27,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305009335] [2022-01-10 06:38:27,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305009335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:27,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:27,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-10 06:38:27,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758249380] [2022-01-10 06:38:27,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:27,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:38:27,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:27,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:38:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:38:27,132 INFO L87 Difference]: Start difference. First operand 215 states and 593 transitions. Second operand has 11 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:38:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:27,255 INFO L93 Difference]: Finished difference Result 543 states and 2182 transitions. [2022-01-10 06:38:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:38:27,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 320 [2022-01-10 06:38:27,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:27,259 INFO L225 Difference]: With dead ends: 543 [2022-01-10 06:38:27,259 INFO L226 Difference]: Without dead ends: 331 [2022-01-10 06:38:27,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:38:27,263 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:27,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 181 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-10 06:38:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 225. [2022-01-10 06:38:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 127 states have (on average 1.125984251968504) internal successors, (143), 130 states have internal predecessors, (143), 50 states have call successors, (50), 15 states have call predecessors, (50), 47 states have return successors, (443), 79 states have call predecessors, (443), 50 states have call successors, (443) [2022-01-10 06:38:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 636 transitions. [2022-01-10 06:38:27,326 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 636 transitions. Word has length 320 [2022-01-10 06:38:27,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:27,327 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 636 transitions. [2022-01-10 06:38:27,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 3 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 06:38:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 636 transitions. [2022-01-10 06:38:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-01-10 06:38:27,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:27,332 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 20, 19, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:27,354 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 06:38:27,532 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 06:38:27,532 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:27,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:27,533 INFO L85 PathProgramCache]: Analyzing trace with hash 279871242, now seen corresponding path program 4 times [2022-01-10 06:38:27,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:27,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265681823] [2022-01-10 06:38:27,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:38:27,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:27,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:27,546 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 06:38:27,550 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 06:38:27,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:38:27,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:27,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:38:27,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 74 proven. 805 refuted. 0 times theorem prover too weak. 3434 trivial. 0 not checked. [2022-01-10 06:38:28,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 74 proven. 826 refuted. 0 times theorem prover too weak. 3413 trivial. 0 not checked. [2022-01-10 06:38:30,718 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265681823] [2022-01-10 06:38:30,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265681823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:30,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:30,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2022-01-10 06:38:30,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982694652] [2022-01-10 06:38:30,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:30,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:38:30,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:38:30,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:38:30,719 INFO L87 Difference]: Start difference. First operand 225 states and 636 transitions. Second operand has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-10 06:38:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:32,337 INFO L93 Difference]: Finished difference Result 683 states and 3001 transitions. [2022-01-10 06:38:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 06:38:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 368 [2022-01-10 06:38:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:32,344 INFO L225 Difference]: With dead ends: 683 [2022-01-10 06:38:32,344 INFO L226 Difference]: Without dead ends: 461 [2022-01-10 06:38:32,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 716 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 06:38:32,349 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:32,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 253 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 06:38:32,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-10 06:38:32,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 420. [2022-01-10 06:38:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 238 states have (on average 1.1218487394957983) internal successors, (267), 243 states have internal predecessors, (267), 88 states have call successors, (88), 26 states have call predecessors, (88), 93 states have return successors, (1202), 150 states have call predecessors, (1202), 88 states have call successors, (1202) [2022-01-10 06:38:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1557 transitions. [2022-01-10 06:38:32,397 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1557 transitions. Word has length 368 [2022-01-10 06:38:32,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:32,397 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 1557 transitions. [2022-01-10 06:38:32,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-10 06:38:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1557 transitions. [2022-01-10 06:38:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-10 06:38:32,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:32,406 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 18, 17, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 10, 10, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:32,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-01-10 06:38:32,615 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 06:38:32,615 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:32,616 INFO L85 PathProgramCache]: Analyzing trace with hash 412199969, now seen corresponding path program 5 times [2022-01-10 06:38:32,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:32,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636200605] [2022-01-10 06:38:32,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:38:32,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:32,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:32,617 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 06:38:32,618 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 06:38:32,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-10 06:38:32,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:32,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 06:38:32,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3712 backedges. 1047 proven. 6 refuted. 0 times theorem prover too weak. 2659 trivial. 0 not checked. [2022-01-10 06:38:33,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3712 backedges. 200 proven. 497 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-01-10 06:38:34,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:34,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636200605] [2022-01-10 06:38:34,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636200605] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:34,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:34,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-10 06:38:34,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795198068] [2022-01-10 06:38:34,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:34,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:38:34,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:34,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:38:34,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:38:34,479 INFO L87 Difference]: Start difference. First operand 420 states and 1557 transitions. Second operand has 12 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2022-01-10 06:38:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:34,626 INFO L93 Difference]: Finished difference Result 832 states and 4034 transitions. [2022-01-10 06:38:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:38:34,627 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) Word has length 342 [2022-01-10 06:38:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:34,633 INFO L225 Difference]: With dead ends: 832 [2022-01-10 06:38:34,633 INFO L226 Difference]: Without dead ends: 415 [2022-01-10 06:38:34,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 672 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-01-10 06:38:34,639 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:34,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 106 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:38:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-10 06:38:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 407. [2022-01-10 06:38:34,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 230 states have (on average 1.126086956521739) internal successors, (259), 235 states have internal predecessors, (259), 87 states have call successors, (87), 26 states have call predecessors, (87), 89 states have return successors, (1121), 145 states have call predecessors, (1121), 87 states have call successors, (1121) [2022-01-10 06:38:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1467 transitions. [2022-01-10 06:38:34,686 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1467 transitions. Word has length 342 [2022-01-10 06:38:34,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:34,686 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1467 transitions. [2022-01-10 06:38:34,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 7 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (20), 5 states have call predecessors, (20), 7 states have call successors, (20) [2022-01-10 06:38:34,686 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1467 transitions. [2022-01-10 06:38:34,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-10 06:38:34,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:34,695 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 17, 16, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:34,705 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 06:38:34,902 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 06:38:34,903 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:34,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:34,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1157691215, now seen corresponding path program 6 times [2022-01-10 06:38:34,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:34,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321372278] [2022-01-10 06:38:34,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:38:34,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:34,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:34,912 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 06:38:34,914 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 06:38:34,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-10 06:38:34,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:35,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:38:35,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3938 backedges. 1426 proven. 5 refuted. 0 times theorem prover too weak. 2507 trivial. 0 not checked. [2022-01-10 06:38:35,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3938 backedges. 290 proven. 445 refuted. 0 times theorem prover too weak. 3203 trivial. 0 not checked. [2022-01-10 06:38:36,993 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:36,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321372278] [2022-01-10 06:38:36,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321372278] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:36,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:36,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-01-10 06:38:36,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992652225] [2022-01-10 06:38:36,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:36,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:38:36,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:36,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:38:36,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:38:36,994 INFO L87 Difference]: Start difference. First operand 407 states and 1467 transitions. Second operand has 20 states, 14 states have (on average 4.142857142857143) internal successors, (58), 18 states have internal predecessors, (58), 9 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-10 06:38:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:37,361 INFO L93 Difference]: Finished difference Result 546 states and 2010 transitions. [2022-01-10 06:38:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:38:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 4.142857142857143) internal successors, (58), 18 states have internal predecessors, (58), 9 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 351 [2022-01-10 06:38:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:37,364 INFO L225 Difference]: With dead ends: 546 [2022-01-10 06:38:37,364 INFO L226 Difference]: Without dead ends: 104 [2022-01-10 06:38:37,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:38:37,369 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:37,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 195 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:37,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-10 06:38:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2022-01-10 06:38:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 16 states have call successors, (16), 7 states have call predecessors, (16), 17 states have return successors, (60), 26 states have call predecessors, (60), 16 states have call successors, (60) [2022-01-10 06:38:37,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 133 transitions. [2022-01-10 06:38:37,380 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 133 transitions. Word has length 351 [2022-01-10 06:38:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:37,380 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 133 transitions. [2022-01-10 06:38:37,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 4.142857142857143) internal successors, (58), 18 states have internal predecessors, (58), 9 states have call successors, (20), 2 states have call predecessors, (20), 6 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-01-10 06:38:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 133 transitions. [2022-01-10 06:38:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-10 06:38:37,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:37,382 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 19, 19, 17, 16, 11, 11, 11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 8, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:37,394 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 06:38:37,589 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 06:38:37,589 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:37,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1760624837, now seen corresponding path program 7 times [2022-01-10 06:38:37,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:37,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49141078] [2022-01-10 06:38:37,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:38:37,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:37,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:37,599 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 06:38:37,684 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 06:38:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:37,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:38:37,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2137 backedges. 96 proven. 501 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2022-01-10 06:38:38,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2137 backedges. 96 proven. 525 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-01-10 06:38:39,194 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:39,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49141078] [2022-01-10 06:38:39,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49141078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:39,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:39,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2022-01-10 06:38:39,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669335818] [2022-01-10 06:38:39,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:39,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:38:39,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:39,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:38:39,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:38:39,195 INFO L87 Difference]: Start difference. First operand 88 states and 133 transitions. Second operand has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-10 06:38:39,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:39,479 INFO L93 Difference]: Finished difference Result 188 states and 363 transitions. [2022-01-10 06:38:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:38:39,479 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) Word has length 263 [2022-01-10 06:38:39,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:39,480 INFO L225 Difference]: With dead ends: 188 [2022-01-10 06:38:39,480 INFO L226 Difference]: Without dead ends: 103 [2022-01-10 06:38:39,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 505 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-10 06:38:39,481 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:39,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 323 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-10 06:38:39,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2022-01-10 06:38:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 18 states have call successors, (18), 7 states have call predecessors, (18), 19 states have return successors, (76), 30 states have call predecessors, (76), 18 states have call successors, (76) [2022-01-10 06:38:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 155 transitions. [2022-01-10 06:38:39,486 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 155 transitions. Word has length 263 [2022-01-10 06:38:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:39,487 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 155 transitions. [2022-01-10 06:38:39,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 17 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (24), 8 states have call predecessors, (24), 17 states have call successors, (24) [2022-01-10 06:38:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 155 transitions. [2022-01-10 06:38:39,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-01-10 06:38:39,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:39,489 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 31, 30, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 12, 12, 8, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:39,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:39,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:39,697 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:39,698 INFO L85 PathProgramCache]: Analyzing trace with hash 260497528, now seen corresponding path program 8 times [2022-01-10 06:38:39,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:39,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879970085] [2022-01-10 06:38:39,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:39,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:39,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:39,712 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:39,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:38:39,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:39,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:39,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:38:39,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7348 backedges. 158 proven. 1215 refuted. 0 times theorem prover too weak. 5975 trivial. 0 not checked. [2022-01-10 06:38:40,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7348 backedges. 158 proven. 1248 refuted. 0 times theorem prover too weak. 5942 trivial. 0 not checked. [2022-01-10 06:38:42,087 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:42,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879970085] [2022-01-10 06:38:42,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879970085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:42,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:42,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2022-01-10 06:38:42,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119181326] [2022-01-10 06:38:42,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:42,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 06:38:42,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 06:38:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-01-10 06:38:42,090 INFO L87 Difference]: Start difference. First operand 96 states and 155 transitions. Second operand has 22 states, 20 states have (on average 3.3) internal successors, (66), 22 states have internal predecessors, (66), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2022-01-10 06:38:42,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:42,357 INFO L93 Difference]: Finished difference Result 204 states and 430 transitions. [2022-01-10 06:38:42,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 06:38:42,357 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.3) internal successors, (66), 22 states have internal predecessors, (66), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) Word has length 478 [2022-01-10 06:38:42,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:42,359 INFO L225 Difference]: With dead ends: 204 [2022-01-10 06:38:42,359 INFO L226 Difference]: Without dead ends: 111 [2022-01-10 06:38:42,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 931 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-01-10 06:38:42,360 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:42,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 470 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:38:42,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-10 06:38:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2022-01-10 06:38:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 20 states have call successors, (20), 7 states have call predecessors, (20), 21 states have return successors, (96), 34 states have call predecessors, (96), 20 states have call successors, (96) [2022-01-10 06:38:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 181 transitions. [2022-01-10 06:38:42,391 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 181 transitions. Word has length 478 [2022-01-10 06:38:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:42,391 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 181 transitions. [2022-01-10 06:38:42,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.3) internal successors, (66), 22 states have internal predecessors, (66), 19 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 19 states have call successors, (27) [2022-01-10 06:38:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 181 transitions. [2022-01-10 06:38:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2022-01-10 06:38:42,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:42,395 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 47, 44, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 27, 19, 17, 12, 8, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:42,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-01-10 06:38:42,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:42,604 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash -71261681, now seen corresponding path program 9 times [2022-01-10 06:38:42,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:42,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81704707] [2022-01-10 06:38:42,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:42,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:42,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:42,620 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:42,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:38:42,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-10 06:38:42,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:42,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:38:42,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16314 backedges. 1872 proven. 54 refuted. 0 times theorem prover too weak. 14388 trivial. 0 not checked. [2022-01-10 06:38:43,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16314 backedges. 1621 proven. 69 refuted. 0 times theorem prover too weak. 14624 trivial. 0 not checked. [2022-01-10 06:38:45,547 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:45,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81704707] [2022-01-10 06:38:45,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81704707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:45,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:45,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 17 [2022-01-10 06:38:45,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563800951] [2022-01-10 06:38:45,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:45,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:38:45,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:45,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:38:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:38:45,552 INFO L87 Difference]: Start difference. First operand 104 states and 181 transitions. Second operand has 17 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 10 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (23), 11 states have call predecessors, (23), 10 states have call successors, (23) [2022-01-10 06:38:45,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:45,946 INFO L93 Difference]: Finished difference Result 281 states and 800 transitions. [2022-01-10 06:38:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:38:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 10 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (23), 11 states have call predecessors, (23), 10 states have call successors, (23) Word has length 706 [2022-01-10 06:38:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:45,950 INFO L225 Difference]: With dead ends: 281 [2022-01-10 06:38:45,950 INFO L226 Difference]: Without dead ends: 180 [2022-01-10 06:38:45,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1418 GetRequests, 1394 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:38:45,952 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:45,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 235 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-10 06:38:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 159. [2022-01-10 06:38:45,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 33 states have call successors, (33), 8 states have call predecessors, (33), 34 states have return successors, (266), 59 states have call predecessors, (266), 33 states have call successors, (266) [2022-01-10 06:38:45,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 394 transitions. [2022-01-10 06:38:45,971 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 394 transitions. Word has length 706 [2022-01-10 06:38:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:45,971 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 394 transitions. [2022-01-10 06:38:45,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.933333333333333) internal successors, (59), 15 states have internal predecessors, (59), 10 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (23), 11 states have call predecessors, (23), 10 states have call successors, (23) [2022-01-10 06:38:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 394 transitions. [2022-01-10 06:38:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2022-01-10 06:38:45,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:45,976 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 33, 31, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 13, 12, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:45,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:46,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:46,186 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:46,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:46,187 INFO L85 PathProgramCache]: Analyzing trace with hash 641763951, now seen corresponding path program 10 times [2022-01-10 06:38:46,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:46,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821233435] [2022-01-10 06:38:46,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:38:46,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:46,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:46,189 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:46,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:38:46,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:38:46,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:46,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 06:38:46,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8160 backedges. 203 proven. 1415 refuted. 0 times theorem prover too weak. 6542 trivial. 0 not checked. [2022-01-10 06:38:47,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8160 backedges. 203 proven. 1459 refuted. 0 times theorem prover too weak. 6498 trivial. 0 not checked. [2022-01-10 06:38:49,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:49,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821233435] [2022-01-10 06:38:49,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821233435] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:49,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:49,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2022-01-10 06:38:49,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616072400] [2022-01-10 06:38:49,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:49,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 06:38:49,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:49,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 06:38:49,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:38:49,023 INFO L87 Difference]: Start difference. First operand 159 states and 394 transitions. Second operand has 24 states, 22 states have (on average 3.227272727272727) internal successors, (71), 24 states have internal predecessors, (71), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) [2022-01-10 06:38:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:49,400 INFO L93 Difference]: Finished difference Result 335 states and 1199 transitions. [2022-01-10 06:38:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:38:49,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.227272727272727) internal successors, (71), 24 states have internal predecessors, (71), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) Word has length 503 [2022-01-10 06:38:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:49,404 INFO L225 Difference]: With dead ends: 335 [2022-01-10 06:38:49,405 INFO L226 Difference]: Without dead ends: 179 [2022-01-10 06:38:49,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1013 GetRequests, 981 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 06:38:49,407 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 37 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:49,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 484 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:49,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-10 06:38:49,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2022-01-10 06:38:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 37 states have call successors, (37), 8 states have call predecessors, (37), 38 states have return successors, (334), 67 states have call predecessors, (334), 37 states have call successors, (334) [2022-01-10 06:38:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 474 transitions. [2022-01-10 06:38:49,422 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 474 transitions. Word has length 503 [2022-01-10 06:38:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:49,423 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 474 transitions. [2022-01-10 06:38:49,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.227272727272727) internal successors, (71), 24 states have internal predecessors, (71), 21 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 10 states have call predecessors, (30), 21 states have call successors, (30) [2022-01-10 06:38:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 474 transitions. [2022-01-10 06:38:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2022-01-10 06:38:49,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:49,428 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 52, 52, 50, 44, 31, 31, 31, 31, 31, 31, 26, 26, 26, 26, 26, 26, 24, 13, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:49,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:49,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:49,638 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:49,638 INFO L85 PathProgramCache]: Analyzing trace with hash -980314360, now seen corresponding path program 11 times [2022-01-10 06:38:49,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:49,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016076495] [2022-01-10 06:38:49,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:38:49,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:49,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:49,649 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:49,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:38:49,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-01-10 06:38:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:49,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 06:38:49,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17657 backedges. 9666 proven. 288 refuted. 0 times theorem prover too weak. 7703 trivial. 0 not checked. [2022-01-10 06:38:50,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17657 backedges. 1094 proven. 1918 refuted. 0 times theorem prover too weak. 14645 trivial. 0 not checked. [2022-01-10 06:38:53,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:53,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016076495] [2022-01-10 06:38:53,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016076495] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:53,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:53,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 25 [2022-01-10 06:38:53,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413183616] [2022-01-10 06:38:53,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:53,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 06:38:53,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:53,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 06:38:53,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:38:53,519 INFO L87 Difference]: Start difference. First operand 175 states and 474 transitions. Second operand has 25 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 19 states have call successors, (32), 2 states have call predecessors, (32), 12 states have return successors, (42), 16 states have call predecessors, (42), 19 states have call successors, (42) [2022-01-10 06:38:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:54,268 INFO L93 Difference]: Finished difference Result 464 states and 1943 transitions. [2022-01-10 06:38:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 06:38:54,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 19 states have call successors, (32), 2 states have call predecessors, (32), 12 states have return successors, (42), 16 states have call predecessors, (42), 19 states have call successors, (42) Word has length 731 [2022-01-10 06:38:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:54,273 INFO L225 Difference]: With dead ends: 464 [2022-01-10 06:38:54,273 INFO L226 Difference]: Without dead ends: 270 [2022-01-10 06:38:54,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1472 GetRequests, 1435 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2022-01-10 06:38:54,278 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 108 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:54,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 501 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:38:54,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-10 06:38:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 234. [2022-01-10 06:38:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 134 states have (on average 1.037313432835821) internal successors, (139), 134 states have internal predecessors, (139), 51 states have call successors, (51), 13 states have call predecessors, (51), 48 states have return successors, (405), 86 states have call predecessors, (405), 51 states have call successors, (405) [2022-01-10 06:38:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 595 transitions. [2022-01-10 06:38:54,300 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 595 transitions. Word has length 731 [2022-01-10 06:38:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:54,301 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 595 transitions. [2022-01-10 06:38:54,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 19 states have call successors, (32), 2 states have call predecessors, (32), 12 states have return successors, (42), 16 states have call predecessors, (42), 19 states have call successors, (42) [2022-01-10 06:38:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 595 transitions. [2022-01-10 06:38:54,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2952 [2022-01-10 06:38:54,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:54,378 INFO L514 BasicCegarLoop]: trace histogram [235, 235, 232, 232, 190, 188, 117, 117, 117, 117, 117, 117, 116, 116, 116, 116, 116, 116, 73, 72, 47, 42, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:54,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:54,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:38:54,586 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:54,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1702586314, now seen corresponding path program 12 times [2022-01-10 06:38:54,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:54,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10980459] [2022-01-10 06:38:54,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:38:54,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:54,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:54,591 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:38:54,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:38:54,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-01-10 06:38:54,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:54,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:38:54,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 293065 backedges. 1519 proven. 6684 refuted. 0 times theorem prover too weak. 284862 trivial. 0 not checked. [2022-01-10 06:38:58,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 293065 backedges. 1519 proven. 6708 refuted. 0 times theorem prover too weak. 284838 trivial. 0 not checked. [2022-01-10 06:39:06,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:06,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10980459] [2022-01-10 06:39:06,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10980459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:06,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:06,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2022-01-10 06:39:06,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725401158] [2022-01-10 06:39:06,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:06,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:39:06,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:06,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:39:06,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:39:06,815 INFO L87 Difference]: Start difference. First operand 234 states and 595 transitions. Second operand has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 16 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (25), 10 states have call predecessors, (25), 16 states have call successors, (25) [2022-01-10 06:39:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:07,174 INFO L93 Difference]: Finished difference Result 502 states and 1750 transitions. [2022-01-10 06:39:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:39:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 16 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (25), 10 states have call predecessors, (25), 16 states have call successors, (25) Word has length 2951 [2022-01-10 06:39:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:07,180 INFO L225 Difference]: With dead ends: 502 [2022-01-10 06:39:07,180 INFO L226 Difference]: Without dead ends: 271 [2022-01-10 06:39:07,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5907 GetRequests, 5881 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-01-10 06:39:07,185 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:07,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 361 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:39:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-10 06:39:07,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 250. [2022-01-10 06:39:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 142 states have (on average 1.0352112676056338) internal successors, (147), 142 states have internal predecessors, (147), 55 states have call successors, (55), 13 states have call predecessors, (55), 52 states have return successors, (496), 94 states have call predecessors, (496), 55 states have call successors, (496) [2022-01-10 06:39:07,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 698 transitions. [2022-01-10 06:39:07,214 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 698 transitions. Word has length 2951 [2022-01-10 06:39:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:07,214 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 698 transitions. [2022-01-10 06:39:07,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 20 states have internal predecessors, (61), 16 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (25), 10 states have call predecessors, (25), 16 states have call successors, (25) [2022-01-10 06:39:07,215 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 698 transitions. [2022-01-10 06:39:07,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2068 [2022-01-10 06:39:07,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:07,322 INFO L514 BasicCegarLoop]: trace histogram [165, 165, 162, 162, 134, 130, 82, 82, 82, 82, 82, 82, 81, 81, 81, 81, 81, 81, 52, 49, 35, 28, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:07,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:07,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:07,533 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:07,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:07,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1985151473, now seen corresponding path program 13 times [2022-01-10 06:39:07,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:07,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080027624] [2022-01-10 06:39:07,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:39:07,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:07,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:07,536 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:07,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:39:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:39:08,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 2898 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:39:08,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 143263 backedges. 650 proven. 7523 refuted. 0 times theorem prover too weak. 135090 trivial. 0 not checked. [2022-01-10 06:39:09,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 143263 backedges. 650 proven. 7579 refuted. 0 times theorem prover too weak. 135034 trivial. 0 not checked. [2022-01-10 06:39:14,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:14,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080027624] [2022-01-10 06:39:14,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080027624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:14,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:14,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2022-01-10 06:39:14,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44909692] [2022-01-10 06:39:14,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:14,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:39:14,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:14,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:39:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:39:14,583 INFO L87 Difference]: Start difference. First operand 250 states and 698 transitions. Second operand has 26 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 26 states have internal predecessors, (76), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) [2022-01-10 06:39:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:14,967 INFO L93 Difference]: Finished difference Result 559 states and 2409 transitions. [2022-01-10 06:39:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 06:39:14,968 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 26 states have internal predecessors, (76), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) Word has length 2067 [2022-01-10 06:39:14,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:14,988 INFO L225 Difference]: With dead ends: 559 [2022-01-10 06:39:14,988 INFO L226 Difference]: Without dead ends: 312 [2022-01-10 06:39:14,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4142 GetRequests, 4105 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 06:39:14,996 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 47 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:14,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 536 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:39:14,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-10 06:39:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 302. [2022-01-10 06:39:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 168 states have (on average 1.0297619047619047) internal successors, (173), 168 states have internal predecessors, (173), 68 states have call successors, (68), 13 states have call predecessors, (68), 65 states have return successors, (724), 120 states have call predecessors, (724), 68 states have call successors, (724) [2022-01-10 06:39:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 965 transitions. [2022-01-10 06:39:15,038 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 965 transitions. Word has length 2067 [2022-01-10 06:39:15,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:15,039 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 965 transitions. [2022-01-10 06:39:15,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 26 states have internal predecessors, (76), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) [2022-01-10 06:39:15,040 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 965 transitions. [2022-01-10 06:39:15,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3886 [2022-01-10 06:39:15,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:15,130 INFO L514 BasicCegarLoop]: trace histogram [310, 310, 305, 305, 250, 248, 155, 155, 155, 155, 155, 155, 152, 152, 152, 152, 152, 152, 96, 95, 62, 55, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:15,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:15,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:39:15,351 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:15,352 INFO L85 PathProgramCache]: Analyzing trace with hash -112997019, now seen corresponding path program 14 times [2022-01-10 06:39:15,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:15,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10712643] [2022-01-10 06:39:15,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:39:15,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:15,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:15,356 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:39:15,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:39:16,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:39:16,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:39:16,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 5436 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:39:16,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 509006 backedges. 1818 proven. 15363 refuted. 0 times theorem prover too weak. 491825 trivial. 0 not checked. [2022-01-10 06:39:20,046 INFO L328 TraceCheckSpWp]: Computing backward predicates...