/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_25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:37:39,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:37:39,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:37:39,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:37:39,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:37:39,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:37:39,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:37:39,436 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 06:37:39,460 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:37:39,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:37:39,461 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:37:39,461 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:37:39,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:37:39,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:37:39,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:37:39,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:37:39,462 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:37:39,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:37:39,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:37:39,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:37:39,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:37:39,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:37:39,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:37:39,463 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:37:39,463 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:37:39,463 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:37:39,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:37:39,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:37:39,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:37:39,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:37:39,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:37:39,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:37:39,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:37:39,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:37:39,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:37:39,465 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:37:39,465 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:37:39,465 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:37:39,465 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:37:39,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:37:39,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:37:39,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:37:39,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:37:39,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:37:39,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:37:39,673 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:37:39,673 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:37:39,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_25-1.c [2022-01-10 06:37:39,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ce3d5d2/d2cc56b7c11246ba80a0883bafa05767/FLAGeb2f4a231 [2022-01-10 06:37:40,072 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:37:40,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-1.c [2022-01-10 06:37:40,080 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ce3d5d2/d2cc56b7c11246ba80a0883bafa05767/FLAGeb2f4a231 [2022-01-10 06:37:40,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92ce3d5d2/d2cc56b7c11246ba80a0883bafa05767 [2022-01-10 06:37:40,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:37:40,095 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:37:40,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:37:40,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:37:40,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:37:40,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:37:40" (1/1) ... [2022-01-10 06:37:40,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b400230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40, skipping insertion in model container [2022-01-10 06:37:40,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:37:40" (1/1) ... [2022-01-10 06:37:40,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:37:40,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:37:40,288 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_25-1.c[746,759] [2022-01-10 06:37:40,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:37:40,301 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:37:40,314 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_25-1.c[746,759] [2022-01-10 06:37:40,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:37:40,328 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:37:40,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40 WrapperNode [2022-01-10 06:37:40,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:37:40,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:37:40,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:37:40,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:37:40,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40" (1/1) ... [2022-01-10 06:37:40,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40" (1/1) ... [2022-01-10 06:37:40,352 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 06:37:40,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:37:40,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:37:40,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:37:40,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:37:40,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40" (1/1) ... [2022-01-10 06:37:40,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40" (1/1) ... [2022-01-10 06:37:40,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40" (1/1) ... [2022-01-10 06:37:40,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40" (1/1) ... [2022-01-10 06:37:40,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40" (1/1) ... [2022-01-10 06:37:40,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40" (1/1) ... [2022-01-10 06:37:40,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40" (1/1) ... [2022-01-10 06:37:40,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:37:40,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:37:40,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:37:40,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:37:40,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40" (1/1) ... [2022-01-10 06:37:40,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:37:40,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:37:40,393 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 06:37:40,394 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 06:37:40,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:37:40,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:37:40,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:37:40,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:37:40,415 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-10 06:37:40,415 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-10 06:37:40,466 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:37:40,467 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:37:40,571 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:37:40,576 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:37:40,576 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:37:40,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:37:40 BoogieIcfgContainer [2022-01-10 06:37:40,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:37:40,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:37:40,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:37:40,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:37:40,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:37:40" (1/3) ... [2022-01-10 06:37:40,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce2a7e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:37:40, skipping insertion in model container [2022-01-10 06:37:40,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:37:40" (2/3) ... [2022-01-10 06:37:40,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce2a7e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:37:40, skipping insertion in model container [2022-01-10 06:37:40,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:37:40" (3/3) ... [2022-01-10 06:37:40,584 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_25-1.c [2022-01-10 06:37:40,588 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:37:40,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:37:40,626 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:37:40,632 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 06:37:40,632 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:37:40,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:37:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 06:37:40,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:40,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:40,648 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:40,652 INFO L85 PathProgramCache]: Analyzing trace with hash 795692101, now seen corresponding path program 1 times [2022-01-10 06:37:40,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:40,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383040391] [2022-01-10 06:37:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:40,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:40,663 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 06:37:40,664 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 06:37:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:40,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:37:40,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:40,812 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 06:37:40,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:37:40,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:40,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383040391] [2022-01-10 06:37:40,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383040391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:37:40,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:37:40,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:37:40,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004019456] [2022-01-10 06:37:40,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:37:40,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:37:40,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:40,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:37:40,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:37:40,836 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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 06:37:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:40,902 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-10 06:37:40,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:37:40,905 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 06:37:40,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:40,909 INFO L225 Difference]: With dead ends: 29 [2022-01-10 06:37:40,909 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 06:37:40,911 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 06:37:40,914 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:40,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:37:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 06:37:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 06:37:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:37:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 06:37:40,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-10 06:37:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:40,938 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 06:37:40,938 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 06:37:40,938 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 06:37:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 06:37:40,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:40,939 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:40,947 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 06:37:41,143 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 06:37:41,144 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:41,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash -360006549, now seen corresponding path program 1 times [2022-01-10 06:37:41,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:41,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373649737] [2022-01-10 06:37:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:41,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:41,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:41,146 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 06:37:41,147 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 06:37:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:41,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:37:41,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:41,199 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 06:37:41,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:37:41,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373649737] [2022-01-10 06:37:41,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373649737] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:37:41,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:37:41,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:37:41,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743256233] [2022-01-10 06:37:41,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:37:41,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:37:41,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:41,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:37:41,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:37:41,202 INFO L87 Difference]: Start difference. First operand 17 states and 21 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 06:37:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:41,238 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-10 06:37:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:37:41,239 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 06:37:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:41,239 INFO L225 Difference]: With dead ends: 23 [2022-01-10 06:37:41,240 INFO L226 Difference]: Without dead ends: 19 [2022-01-10 06:37:41,240 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 06:37:41,241 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:41,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:37:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-10 06:37:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-10 06:37:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:37:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-10 06:37:41,245 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-10 06:37:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:41,246 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-10 06:37:41,246 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 06:37:41,246 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-10 06:37:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 06:37:41,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:41,247 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:41,259 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 06:37:41,453 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 06:37:41,454 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:41,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:41,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1663150085, now seen corresponding path program 1 times [2022-01-10 06:37:41,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:41,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209588849] [2022-01-10 06:37:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:41,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:41,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:41,463 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 06:37:41,464 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 06:37:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:41,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:37:41,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:37:41,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:37:41,851 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:41,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209588849] [2022-01-10 06:37:41,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209588849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:41,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:41,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-01-10 06:37:41,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853180893] [2022-01-10 06:37:41,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:41,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:37:41,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:41,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:37:41,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:37:41,853 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 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 06:37:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:41,962 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-01-10 06:37:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:37:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 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 06:37:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:41,964 INFO L225 Difference]: With dead ends: 27 [2022-01-10 06:37:41,964 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 06:37:41,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:37:41,965 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:41,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 06:37:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-01-10 06:37:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-01-10 06:37:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2022-01-10 06:37:41,971 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 22 [2022-01-10 06:37:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:41,971 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2022-01-10 06:37:41,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 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 06:37:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2022-01-10 06:37:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 06:37:41,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:41,973 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:41,980 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 06:37:42,181 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 06:37:42,181 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:42,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:42,182 INFO L85 PathProgramCache]: Analyzing trace with hash 17297569, now seen corresponding path program 1 times [2022-01-10 06:37:42,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:42,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135230757] [2022-01-10 06:37:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:37:42,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:42,184 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 06:37:42,185 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 06:37:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:42,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:37:42,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:37:42,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:37:42,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:42,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135230757] [2022-01-10 06:37:42,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135230757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:42,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:42,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2022-01-10 06:37:42,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107927385] [2022-01-10 06:37:42,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:42,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:37:42,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:42,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:37:42,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:37:42,446 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 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 06:37:42,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:42,520 INFO L93 Difference]: Finished difference Result 45 states and 79 transitions. [2022-01-10 06:37:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:37:42,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 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 23 [2022-01-10 06:37:42,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:42,522 INFO L225 Difference]: With dead ends: 45 [2022-01-10 06:37:42,522 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 06:37:42,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:37:42,524 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:42,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 58 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 06:37:42,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 06:37:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.125) internal successors, (18), 18 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2022-01-10 06:37:42,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 42 transitions. [2022-01-10 06:37:42,531 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 42 transitions. Word has length 23 [2022-01-10 06:37:42,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:42,531 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 42 transitions. [2022-01-10 06:37:42,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 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 06:37:42,532 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 42 transitions. [2022-01-10 06:37:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 06:37:42,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:42,533 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:42,542 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 06:37:42,739 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 06:37:42,739 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash -310195131, now seen corresponding path program 2 times [2022-01-10 06:37:42,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:42,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942471164] [2022-01-10 06:37:42,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:42,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:42,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:42,742 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 06:37:42,784 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 06:37:42,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:42,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:42,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:37:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 06:37:42,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:37:43,272 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:43,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942471164] [2022-01-10 06:37:43,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942471164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:43,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:43,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2022-01-10 06:37:43,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374361830] [2022-01-10 06:37:43,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:43,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:37:43,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:37:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:37:43,273 INFO L87 Difference]: Start difference. First operand 27 states and 42 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:37:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:43,430 INFO L93 Difference]: Finished difference Result 60 states and 110 transitions. [2022-01-10 06:37:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:37:43,431 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) Word has length 34 [2022-01-10 06:37:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:43,432 INFO L225 Difference]: With dead ends: 60 [2022-01-10 06:37:43,432 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 06:37:43,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:43,434 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:43,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 68 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 06:37:43,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-01-10 06:37:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 06:37:43,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-10 06:37:43,440 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 34 [2022-01-10 06:37:43,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:43,440 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-10 06:37:43,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:37:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-10 06:37:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 06:37:43,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:43,441 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:43,447 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 06:37:43,647 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 06:37:43,648 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:43,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:43,648 INFO L85 PathProgramCache]: Analyzing trace with hash -441896069, now seen corresponding path program 2 times [2022-01-10 06:37:43,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:43,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461335390] [2022-01-10 06:37:43,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:43,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:43,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:43,650 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 06:37:43,651 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 06:37:43,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:43,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:43,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:37:43,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 06:37:43,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:37:43,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:43,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461335390] [2022-01-10 06:37:43,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461335390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:43,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:43,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2022-01-10 06:37:43,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008594695] [2022-01-10 06:37:43,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:43,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:37:43,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:43,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:37:43,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:37:43,999 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:37:44,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:44,095 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2022-01-10 06:37:44,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:37:44,095 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) Word has length 36 [2022-01-10 06:37:44,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:44,096 INFO L225 Difference]: With dead ends: 67 [2022-01-10 06:37:44,096 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 06:37:44,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:37:44,098 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:44,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 69 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:44,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 06:37:44,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-01-10 06:37:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2022-01-10 06:37:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 54 transitions. [2022-01-10 06:37:44,104 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 54 transitions. Word has length 36 [2022-01-10 06:37:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:44,104 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 54 transitions. [2022-01-10 06:37:44,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 06:37:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 54 transitions. [2022-01-10 06:37:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:37:44,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:44,106 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:44,112 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 06:37:44,311 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 06:37:44,311 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash -104523349, now seen corresponding path program 3 times [2022-01-10 06:37:44,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:44,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205058310] [2022-01-10 06:37:44,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:37:44,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:44,313 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 06:37:44,315 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 06:37:44,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 06:37:44,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:44,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:37:44,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 180 proven. 5 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-01-10 06:37:44,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 136 proven. 15 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-01-10 06:37:44,967 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205058310] [2022-01-10 06:37:44,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205058310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:44,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:44,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2022-01-10 06:37:44,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276889478] [2022-01-10 06:37:44,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:44,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:37:44,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:44,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:37:44,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:37:44,969 INFO L87 Difference]: Start difference. First operand 37 states and 54 transitions. Second operand has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-01-10 06:37:45,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:45,068 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2022-01-10 06:37:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:37:45,069 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 83 [2022-01-10 06:37:45,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:45,069 INFO L225 Difference]: With dead ends: 66 [2022-01-10 06:37:45,069 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 06:37:45,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:45,070 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:45,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 56 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 06:37:45,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-10 06:37:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-01-10 06:37:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-01-10 06:37:45,074 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 83 [2022-01-10 06:37:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:45,074 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-01-10 06:37:45,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 5 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-01-10 06:37:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-01-10 06:37:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:37:45,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:45,075 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:45,085 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 06:37:45,285 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 06:37:45,286 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:45,287 INFO L85 PathProgramCache]: Analyzing trace with hash 694906923, now seen corresponding path program 4 times [2022-01-10 06:37:45,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:45,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970611217] [2022-01-10 06:37:45,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:37:45,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:45,290 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 06:37:45,291 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 06:37:45,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:37:45,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:45,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:37:45,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 27 proven. 154 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-01-10 06:37:45,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 27 proven. 169 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-01-10 06:37:45,887 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:45,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970611217] [2022-01-10 06:37:45,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970611217] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:45,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:45,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2022-01-10 06:37:45,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515261053] [2022-01-10 06:37:45,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:45,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 06:37:45,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:45,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 06:37:45,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:37:45,888 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2022-01-10 06:37:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:46,011 INFO L93 Difference]: Finished difference Result 72 states and 104 transitions. [2022-01-10 06:37:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:37:46,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) Word has length 87 [2022-01-10 06:37:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:46,013 INFO L225 Difference]: With dead ends: 72 [2022-01-10 06:37:46,013 INFO L226 Difference]: Without dead ends: 43 [2022-01-10 06:37:46,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:37:46,014 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:46,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 91 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-10 06:37:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-01-10 06:37:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (15), 9 states have call predecessors, (15), 7 states have call successors, (15) [2022-01-10 06:37:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-01-10 06:37:46,018 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 87 [2022-01-10 06:37:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:46,018 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-01-10 06:37:46,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (11), 1 states have call predecessors, (11), 5 states have return successors, (13), 5 states have call predecessors, (13), 10 states have call successors, (13) [2022-01-10 06:37:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-01-10 06:37:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-10 06:37:46,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:46,020 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:46,041 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 06:37:46,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:37:46,224 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:46,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:46,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1826158945, now seen corresponding path program 5 times [2022-01-10 06:37:46,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:46,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001217653] [2022-01-10 06:37:46,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:37:46,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:46,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:46,225 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 06:37:46,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:37:46,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-01-10 06:37:46,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:46,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 06:37:46,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 318 proven. 265 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-01-10 06:37:46,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 321 proven. 309 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2022-01-10 06:37:48,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001217653] [2022-01-10 06:37:48,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001217653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:48,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:48,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 23 [2022-01-10 06:37:48,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432859174] [2022-01-10 06:37:48,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:48,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 06:37:48,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:48,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 06:37:48,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:37:48,480 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) [2022-01-10 06:37:48,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:48,907 INFO L93 Difference]: Finished difference Result 99 states and 164 transitions. [2022-01-10 06:37:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 06:37:48,908 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) Word has length 137 [2022-01-10 06:37:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:48,914 INFO L225 Difference]: With dead ends: 99 [2022-01-10 06:37:48,914 INFO L226 Difference]: Without dead ends: 62 [2022-01-10 06:37:48,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 242 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2022-01-10 06:37:48,916 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 92 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:48,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 141 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:37:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-10 06:37:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2022-01-10 06:37:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (29), 13 states have call predecessors, (29), 10 states have call successors, (29) [2022-01-10 06:37:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2022-01-10 06:37:48,930 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 137 [2022-01-10 06:37:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:48,930 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2022-01-10 06:37:48,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 16 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) [2022-01-10 06:37:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2022-01-10 06:37:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 06:37:48,931 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:48,932 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:48,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:49,132 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 06:37:49,132 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:49,133 INFO L85 PathProgramCache]: Analyzing trace with hash -999938399, now seen corresponding path program 6 times [2022-01-10 06:37:49,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:49,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014092054] [2022-01-10 06:37:49,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:37:49,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:49,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:49,134 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 06:37:49,135 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 06:37:49,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-10 06:37:49,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:49,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:37:49,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 41 proven. 212 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-01-10 06:37:49,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 41 proven. 238 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-01-10 06:37:49,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014092054] [2022-01-10 06:37:49,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014092054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:49,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:49,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2022-01-10 06:37:49,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215624917] [2022-01-10 06:37:49,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:49,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:37:49,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:49,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:37:49,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:49,914 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) [2022-01-10 06:37:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:50,102 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-01-10 06:37:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 06:37:50,103 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) Word has length 99 [2022-01-10 06:37:50,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:50,103 INFO L225 Difference]: With dead ends: 56 [2022-01-10 06:37:50,104 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 06:37:50,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:37:50,104 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:50,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 126 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:50,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 06:37:50,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-10 06:37:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (28), 13 states have call predecessors, (28), 10 states have call successors, (28) [2022-01-10 06:37:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2022-01-10 06:37:50,119 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 99 [2022-01-10 06:37:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:50,119 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2022-01-10 06:37:50,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 12 states have call successors, (13), 1 states have call predecessors, (13), 6 states have return successors, (16), 6 states have call predecessors, (16), 12 states have call successors, (16) [2022-01-10 06:37:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2022-01-10 06:37:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-10 06:37:50,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:50,120 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:50,129 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 06:37:50,329 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 06:37:50,329 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:50,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:50,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1213908091, now seen corresponding path program 7 times [2022-01-10 06:37:50,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:50,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973030214] [2022-01-10 06:37:50,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:37:50,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:50,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:50,332 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 06:37:50,332 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 06:37:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:37:50,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 06:37:50,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 89 proven. 492 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked. [2022-01-10 06:37:50,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 89 proven. 532 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2022-01-10 06:37:51,417 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:51,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973030214] [2022-01-10 06:37:51,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973030214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:51,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:51,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2022-01-10 06:37:51,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955363654] [2022-01-10 06:37:51,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:51,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 06:37:51,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:51,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 06:37:51,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-10 06:37:51,419 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2022-01-10 06:37:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:51,676 INFO L93 Difference]: Finished difference Result 120 states and 216 transitions. [2022-01-10 06:37:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 06:37:51,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) Word has length 162 [2022-01-10 06:37:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:51,678 INFO L225 Difference]: With dead ends: 120 [2022-01-10 06:37:51,679 INFO L226 Difference]: Without dead ends: 71 [2022-01-10 06:37:51,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 305 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-01-10 06:37:51,680 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 42 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:51,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 169 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:37:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-10 06:37:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 60. [2022-01-10 06:37:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 12 states have call successors, (12), 6 states have call predecessors, (12), 9 states have return successors, (33), 15 states have call predecessors, (33), 12 states have call successors, (33) [2022-01-10 06:37:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2022-01-10 06:37:51,685 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 162 [2022-01-10 06:37:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:51,686 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2022-01-10 06:37:51,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.066666666666667) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (19), 7 states have call predecessors, (19), 14 states have call successors, (19) [2022-01-10 06:37:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2022-01-10 06:37:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-10 06:37:51,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:51,688 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:51,699 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 06:37:51,895 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 06:37:51,895 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:51,896 INFO L85 PathProgramCache]: Analyzing trace with hash -812944297, now seen corresponding path program 8 times [2022-01-10 06:37:51,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:51,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6885703] [2022-01-10 06:37:51,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:37:51,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:51,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:51,897 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 06:37:51,898 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 06:37:51,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:37:51,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:51,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 06:37:51,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 178 proven. 1042 refuted. 0 times theorem prover too weak. 3158 trivial. 0 not checked. [2022-01-10 06:37:52,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4378 backedges. 178 proven. 1099 refuted. 0 times theorem prover too weak. 3101 trivial. 0 not checked. [2022-01-10 06:37:53,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:53,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6885703] [2022-01-10 06:37:53,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6885703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:53,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:53,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2022-01-10 06:37:53,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536301611] [2022-01-10 06:37:53,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:53,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 06:37:53,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:53,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 06:37:53,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-10 06:37:53,466 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand has 19 states, 17 states have (on average 3.0) internal successors, (51), 19 states have internal predecessors, (51), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2022-01-10 06:37:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:53,778 INFO L93 Difference]: Finished difference Result 137 states and 257 transitions. [2022-01-10 06:37:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:37:53,779 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0) internal successors, (51), 19 states have internal predecessors, (51), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) Word has length 263 [2022-01-10 06:37:53,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:53,782 INFO L225 Difference]: With dead ends: 137 [2022-01-10 06:37:53,782 INFO L226 Difference]: Without dead ends: 80 [2022-01-10 06:37:53,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 505 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-01-10 06:37:53,784 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 68 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:53,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 201 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:37:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-10 06:37:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2022-01-10 06:37:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (34), 16 states have call predecessors, (34), 14 states have call successors, (34) [2022-01-10 06:37:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2022-01-10 06:37:53,795 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 263 [2022-01-10 06:37:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:53,796 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2022-01-10 06:37:53,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0) internal successors, (51), 19 states have internal predecessors, (51), 16 states have call successors, (17), 1 states have call predecessors, (17), 8 states have return successors, (22), 8 states have call predecessors, (22), 16 states have call successors, (22) [2022-01-10 06:37:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2022-01-10 06:37:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-01-10 06:37:53,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:53,799 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:53,826 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 06:37:54,015 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 06:37:54,015 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:54,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:54,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1895432243, now seen corresponding path program 9 times [2022-01-10 06:37:54,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:54,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762508876] [2022-01-10 06:37:54,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:37:54,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:54,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:54,017 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 06:37:54,019 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 06:37:54,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-01-10 06:37:54,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:54,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 06:37:54,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11859 backedges. 1310 proven. 242 refuted. 0 times theorem prover too weak. 10307 trivial. 0 not checked. [2022-01-10 06:37:54,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11859 backedges. 1310 proven. 271 refuted. 0 times theorem prover too weak. 10278 trivial. 0 not checked. [2022-01-10 06:37:55,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:55,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762508876] [2022-01-10 06:37:55,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762508876] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:55,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:55,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2022-01-10 06:37:55,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424715075] [2022-01-10 06:37:55,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:55,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 06:37:55,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:55,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 06:37:55,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-10 06:37:55,934 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 06:37:56,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:56,052 INFO L93 Difference]: Finished difference Result 72 states and 100 transitions. [2022-01-10 06:37:56,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:37:56,052 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) Word has length 427 [2022-01-10 06:37:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:56,053 INFO L225 Difference]: With dead ends: 72 [2022-01-10 06:37:56,053 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 06:37:56,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 857 GetRequests, 838 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:37:56,054 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:56,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 117 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:37:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 06:37:56,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-10 06:37:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (37), 17 states have call predecessors, (37), 14 states have call successors, (37) [2022-01-10 06:37:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2022-01-10 06:37:56,059 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 427 [2022-01-10 06:37:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:56,060 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2022-01-10 06:37:56,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2022-01-10 06:37:56,060 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2022-01-10 06:37:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-01-10 06:37:56,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:56,065 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 67, 41, 41, 41, 41, 41, 41, 26, 16, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:56,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:37:56,265 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 06:37:56,266 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:56,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:56,266 INFO L85 PathProgramCache]: Analyzing trace with hash 279703193, now seen corresponding path program 10 times [2022-01-10 06:37:56,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:56,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963144781] [2022-01-10 06:37:56,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:37:56,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:56,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:56,268 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 06:37:56,268 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 06:37:56,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:37:56,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:37:56,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:37:56,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:37:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18283 backedges. 376 proven. 2708 refuted. 0 times theorem prover too weak. 15199 trivial. 0 not checked. [2022-01-10 06:37:57,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:37:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18283 backedges. 376 proven. 2785 refuted. 0 times theorem prover too weak. 15122 trivial. 0 not checked. [2022-01-10 06:37:58,911 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:37:58,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963144781] [2022-01-10 06:37:58,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963144781] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:37:58,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:37:58,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2022-01-10 06:37:58,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869931704] [2022-01-10 06:37:58,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:37:58,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:37:58,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:37:58,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:37:58,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:37:58,913 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2022-01-10 06:37:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:37:59,303 INFO L93 Difference]: Finished difference Result 156 states and 287 transitions. [2022-01-10 06:37:59,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:37:59,304 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) Word has length 528 [2022-01-10 06:37:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:37:59,307 INFO L225 Difference]: With dead ends: 156 [2022-01-10 06:37:59,307 INFO L226 Difference]: Without dead ends: 91 [2022-01-10 06:37:59,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1033 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:37:59,308 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 101 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:37:59,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 228 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:37:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-10 06:37:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2022-01-10 06:37:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 15 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (31), 17 states have call predecessors, (31), 15 states have call successors, (31) [2022-01-10 06:37:59,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-01-10 06:37:59,317 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 528 [2022-01-10 06:37:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:37:59,318 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-01-10 06:37:59,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 18 states have call successors, (19), 1 states have call predecessors, (19), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2022-01-10 06:37:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-01-10 06:37:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2022-01-10 06:37:59,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:37:59,324 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:37:59,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-01-10 06:37:59,534 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 06:37:59,534 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:37:59,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:37:59,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1303971427, now seen corresponding path program 11 times [2022-01-10 06:37:59,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:37:59,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629183459] [2022-01-10 06:37:59,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:37:59,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:37:59,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:37:59,537 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 06:37:59,538 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 06:38:00,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) [2022-01-10 06:38:00,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:00,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 06:38:00,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 31665 backedges. 3042 proven. 1417 refuted. 0 times theorem prover too weak. 27206 trivial. 0 not checked. [2022-01-10 06:38:01,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 31665 backedges. 3040 proven. 1486 refuted. 0 times theorem prover too weak. 27139 trivial. 0 not checked. [2022-01-10 06:38:04,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629183459] [2022-01-10 06:38:04,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629183459] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:04,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:04,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 28 [2022-01-10 06:38:04,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866157377] [2022-01-10 06:38:04,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:04,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 06:38:04,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 06:38:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-01-10 06:38:04,157 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 28 states, 23 states have (on average 2.782608695652174) internal successors, (64), 26 states have internal predecessors, (64), 20 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (27), 13 states have call predecessors, (27), 20 states have call successors, (27) [2022-01-10 06:38:04,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:04,669 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2022-01-10 06:38:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 06:38:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 2.782608695652174) internal successors, (64), 26 states have internal predecessors, (64), 20 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (27), 13 states have call predecessors, (27), 20 states have call successors, (27) Word has length 692 [2022-01-10 06:38:04,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:04,671 INFO L225 Difference]: With dead ends: 102 [2022-01-10 06:38:04,671 INFO L226 Difference]: Without dead ends: 96 [2022-01-10 06:38:04,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1393 GetRequests, 1353 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 06:38:04,672 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 214 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:04,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 270 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-10 06:38:04,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2022-01-10 06:38:04,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 10 states have return successors, (31), 17 states have call predecessors, (31), 15 states have call successors, (31) [2022-01-10 06:38:04,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2022-01-10 06:38:04,677 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 692 [2022-01-10 06:38:04,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:04,677 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2022-01-10 06:38:04,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 2.782608695652174) internal successors, (64), 26 states have internal predecessors, (64), 20 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (27), 13 states have call predecessors, (27), 20 states have call successors, (27) [2022-01-10 06:38:04,677 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2022-01-10 06:38:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2022-01-10 06:38:04,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:04,704 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 109, 67, 67, 67, 67, 67, 67, 42, 26, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:04,716 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 06:38:04,904 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 06:38:04,905 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:04,905 INFO L85 PathProgramCache]: Analyzing trace with hash 997121709, now seen corresponding path program 12 times [2022-01-10 06:38:04,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:04,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224822477] [2022-01-10 06:38:04,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:38:04,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:04,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:04,907 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 06:38:04,909 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 06:38:05,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-01-10 06:38:05,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:05,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 06:38:05,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 48699 backedges. 959 proven. 4255 refuted. 0 times theorem prover too weak. 43485 trivial. 0 not checked. [2022-01-10 06:38:05,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 48699 backedges. 959 proven. 4332 refuted. 0 times theorem prover too weak. 43408 trivial. 0 not checked. [2022-01-10 06:38:08,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:08,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224822477] [2022-01-10 06:38:08,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224822477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:08,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:08,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2022-01-10 06:38:08,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278348218] [2022-01-10 06:38:08,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:08,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 06:38:08,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:08,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 06:38:08,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-10 06:38:08,705 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2022-01-10 06:38:09,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:09,101 INFO L93 Difference]: Finished difference Result 216 states and 372 transitions. [2022-01-10 06:38:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 06:38:09,102 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) Word has length 856 [2022-01-10 06:38:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:09,104 INFO L225 Difference]: With dead ends: 216 [2022-01-10 06:38:09,104 INFO L226 Difference]: Without dead ends: 129 [2022-01-10 06:38:09,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1718 GetRequests, 1690 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:38:09,105 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 64 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:09,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 234 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:38:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-10 06:38:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 92. [2022-01-10 06:38:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 59 states have internal predecessors, (62), 18 states have call successors, (18), 11 states have call predecessors, (18), 13 states have return successors, (42), 21 states have call predecessors, (42), 18 states have call successors, (42) [2022-01-10 06:38:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 122 transitions. [2022-01-10 06:38:09,114 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 122 transitions. Word has length 856 [2022-01-10 06:38:09,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:09,116 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 122 transitions. [2022-01-10 06:38:09,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 21 states have internal predecessors, (56), 17 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2022-01-10 06:38:09,116 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 122 transitions. [2022-01-10 06:38:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1122 [2022-01-10 06:38:09,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:09,124 INFO L514 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:09,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:38:09,332 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 06:38:09,333 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:09,334 INFO L85 PathProgramCache]: Analyzing trace with hash -776657203, now seen corresponding path program 13 times [2022-01-10 06:38:09,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:09,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371963864] [2022-01-10 06:38:09,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 06:38:09,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:09,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:09,337 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 06:38:09,338 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 06:38:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:38:09,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1577 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 06:38:09,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 83941 backedges. 1067 proven. 7568 refuted. 0 times theorem prover too weak. 75306 trivial. 0 not checked. [2022-01-10 06:38:10,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 83941 backedges. 1067 proven. 7694 refuted. 0 times theorem prover too weak. 75180 trivial. 0 not checked. [2022-01-10 06:38:14,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:14,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371963864] [2022-01-10 06:38:14,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371963864] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:14,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:14,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2022-01-10 06:38:14,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389516137] [2022-01-10 06:38:14,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:14,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 06:38:14,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:14,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 06:38:14,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:38:14,671 INFO L87 Difference]: Start difference. First operand 92 states and 122 transitions. Second operand has 25 states, 23 states have (on average 2.869565217391304) internal successors, (66), 25 states have internal predecessors, (66), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2022-01-10 06:38:15,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:15,170 INFO L93 Difference]: Finished difference Result 216 states and 412 transitions. [2022-01-10 06:38:15,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 06:38:15,170 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.869565217391304) internal successors, (66), 25 states have internal predecessors, (66), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) Word has length 1121 [2022-01-10 06:38:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:15,172 INFO L225 Difference]: With dead ends: 216 [2022-01-10 06:38:15,172 INFO L226 Difference]: Without dead ends: 127 [2022-01-10 06:38:15,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2250 GetRequests, 2214 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 06:38:15,174 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 44 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:15,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 312 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 06:38:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-10 06:38:15,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 93. [2022-01-10 06:38:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 59 states have internal predecessors, (62), 19 states have call successors, (19), 11 states have call predecessors, (19), 13 states have return successors, (41), 22 states have call predecessors, (41), 19 states have call successors, (41) [2022-01-10 06:38:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-01-10 06:38:15,179 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 1121 [2022-01-10 06:38:15,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:15,180 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-01-10 06:38:15,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.869565217391304) internal successors, (66), 25 states have internal predecessors, (66), 22 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 11 states have call predecessors, (31), 22 states have call successors, (31) [2022-01-10 06:38:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-01-10 06:38:15,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2245 [2022-01-10 06:38:15,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:15,211 INFO L514 BasicCegarLoop]: trace histogram [355, 355, 287, 177, 177, 177, 177, 177, 177, 110, 68, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:15,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 06:38:15,424 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 06:38:15,425 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:15,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1026576851, now seen corresponding path program 14 times [2022-01-10 06:38:15,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:15,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676959367] [2022-01-10 06:38:15,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:38:15,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:15,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:15,428 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 06:38:15,430 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 06:38:16,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:38:16,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:16,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 3145 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 06:38:16,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 339109 backedges. 2001 proven. 17597 refuted. 0 times theorem prover too weak. 319511 trivial. 0 not checked. [2022-01-10 06:38:18,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 339109 backedges. 2001 proven. 17752 refuted. 0 times theorem prover too weak. 319356 trivial. 0 not checked. [2022-01-10 06:38:25,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:25,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676959367] [2022-01-10 06:38:25,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676959367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:25,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:25,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2022-01-10 06:38:25,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445126679] [2022-01-10 06:38:25,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:25,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 06:38:25,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 06:38:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-01-10 06:38:25,399 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 27 states, 25 states have (on average 2.84) internal successors, (71), 27 states have internal predecessors, (71), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2022-01-10 06:38:26,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:26,088 INFO L93 Difference]: Finished difference Result 222 states and 427 transitions. [2022-01-10 06:38:26,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 06:38:26,088 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.84) internal successors, (71), 27 states have internal predecessors, (71), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) Word has length 2244 [2022-01-10 06:38:26,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:26,090 INFO L225 Difference]: With dead ends: 222 [2022-01-10 06:38:26,091 INFO L226 Difference]: Without dead ends: 132 [2022-01-10 06:38:26,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4497 GetRequests, 4456 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:38:26,092 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 210 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:26,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 381 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 06:38:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-10 06:38:26,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 101. [2022-01-10 06:38:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 64 states have internal predecessors, (67), 21 states have call successors, (21), 12 states have call predecessors, (21), 14 states have return successors, (45), 24 states have call predecessors, (45), 21 states have call successors, (45) [2022-01-10 06:38:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2022-01-10 06:38:26,129 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 2244 [2022-01-10 06:38:26,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:26,130 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2022-01-10 06:38:26,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.84) internal successors, (71), 27 states have internal predecessors, (71), 24 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (34), 12 states have call predecessors, (34), 24 states have call successors, (34) [2022-01-10 06:38:26,131 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2022-01-10 06:38:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2939 [2022-01-10 06:38:26,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:26,181 INFO L514 BasicCegarLoop]: trace histogram [465, 465, 376, 232, 232, 232, 232, 232, 232, 144, 89, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:26,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-01-10 06:38:26,381 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 06:38:26,382 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:26,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:26,383 INFO L85 PathProgramCache]: Analyzing trace with hash 345916693, now seen corresponding path program 15 times [2022-01-10 06:38:26,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:26,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840492692] [2022-01-10 06:38:26,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:38:26,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:26,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:26,386 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 06:38:26,393 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 06:38:26,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2022-01-10 06:38:26,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:38:26,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 06:38:26,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:38:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 582408 backedges. 3091 proven. 25120 refuted. 0 times theorem prover too weak. 554197 trivial. 0 not checked. [2022-01-10 06:38:29,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:38:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 582408 backedges. 3091 proven. 25307 refuted. 0 times theorem prover too weak. 554010 trivial. 0 not checked. [2022-01-10 06:38:39,156 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:38:39,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840492692] [2022-01-10 06:38:39,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840492692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:38:39,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:38:39,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2022-01-10 06:38:39,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861927015] [2022-01-10 06:38:39,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:38:39,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 06:38:39,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:38:39,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 06:38:39,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-01-10 06:38:39,159 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 29 states have internal predecessors, (76), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) [2022-01-10 06:38:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:38:39,991 INFO L93 Difference]: Finished difference Result 242 states and 479 transitions. [2022-01-10 06:38:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 06:38:39,992 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 29 states have internal predecessors, (76), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) Word has length 2938 [2022-01-10 06:38:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:38:39,995 INFO L225 Difference]: With dead ends: 242 [2022-01-10 06:38:39,995 INFO L226 Difference]: Without dead ends: 144 [2022-01-10 06:38:39,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5886 GetRequests, 5844 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 06:38:39,997 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 161 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 06:38:39,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 452 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 1561 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 06:38:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-10 06:38:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 109. [2022-01-10 06:38:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 states have internal predecessors, (72), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (49), 26 states have call predecessors, (49), 23 states have call successors, (49) [2022-01-10 06:38:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 144 transitions. [2022-01-10 06:38:40,004 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 144 transitions. Word has length 2938 [2022-01-10 06:38:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:38:40,006 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 144 transitions. [2022-01-10 06:38:40,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.814814814814815) internal successors, (76), 29 states have internal predecessors, (76), 26 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (37), 13 states have call predecessors, (37), 26 states have call successors, (37) [2022-01-10 06:38:40,006 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 144 transitions. [2022-01-10 06:38:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5879 [2022-01-10 06:38:40,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:38:40,241 INFO L514 BasicCegarLoop]: trace histogram [931, 931, 753, 465, 465, 465, 465, 465, 465, 288, 178, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:38:40,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 06:38:40,442 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 06:38:40,443 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:38:40,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:38:40,444 INFO L85 PathProgramCache]: Analyzing trace with hash 234586629, now seen corresponding path program 16 times [2022-01-10 06:38:40,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:38:40,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48821177] [2022-01-10 06:38:40,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:38:40,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:38:40,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:38:40,447 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 06:38:40,449 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 06:38:42,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:38:42,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat