/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/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:36:17,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:36:17,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:36:17,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:36:17,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:36:17,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:36:17,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:36:17,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:36:17,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:36:17,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:36:17,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:36:17,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:36:17,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:36:17,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:36:17,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:36:17,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:36:17,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 06:36:17,513 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 06:36:17,547 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:36:17,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:36:17,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:36:17,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:36:17,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:36:17,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:36:17,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:36:17,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:36:17,550 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:36:17,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:36:17,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:36:17,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:36:17,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:36:17,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:36:17,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:36:17,551 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:36:17,551 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:36:17,552 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:36:17,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:36:17,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:36:17,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:36:17,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:36:17,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:36:17,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:36:17,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:36:17,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:36:17,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:36:17,553 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:36:17,553 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:36:17,553 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:36:17,553 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:36:17,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:36:17,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:36:17,554 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:36:17,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:36:17,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:36:17,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:36:17,801 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:36:17,801 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:36:17,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann04.c [2022-01-10 06:36:17,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bddf6e6e/79cd7accb411447cb6889442272fd431/FLAG9a78a8827 [2022-01-10 06:36:18,258 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:36:18,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann04.c [2022-01-10 06:36:18,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bddf6e6e/79cd7accb411447cb6889442272fd431/FLAG9a78a8827 [2022-01-10 06:36:18,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7bddf6e6e/79cd7accb411447cb6889442272fd431 [2022-01-10 06:36:18,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:36:18,276 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:36:18,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:36:18,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:36:18,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:36:18,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:36:18" (1/1) ... [2022-01-10 06:36:18,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@640a9784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18, skipping insertion in model container [2022-01-10 06:36:18,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:36:18" (1/1) ... [2022-01-10 06:36:18,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:36:18,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:36:18,477 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/Ackermann04.c[1166,1179] [2022-01-10 06:36:18,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:36:18,492 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:36:18,515 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/Ackermann04.c[1166,1179] [2022-01-10 06:36:18,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:36:18,546 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:36:18,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18 WrapperNode [2022-01-10 06:36:18,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:36:18,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:36:18,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:36:18,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:36:18,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18" (1/1) ... [2022-01-10 06:36:18,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18" (1/1) ... [2022-01-10 06:36:18,575 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2022-01-10 06:36:18,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:36:18,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:36:18,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:36:18,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:36:18,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18" (1/1) ... [2022-01-10 06:36:18,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18" (1/1) ... [2022-01-10 06:36:18,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18" (1/1) ... [2022-01-10 06:36:18,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18" (1/1) ... [2022-01-10 06:36:18,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18" (1/1) ... [2022-01-10 06:36:18,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18" (1/1) ... [2022-01-10 06:36:18,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18" (1/1) ... [2022-01-10 06:36:18,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:36:18,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:36:18,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:36:18,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:36:18,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18" (1/1) ... [2022-01-10 06:36:18,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:36:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:36:18,625 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 06:36:18,646 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 06:36:18,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:36:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:36:18,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:36:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:36:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-01-10 06:36:18,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-01-10 06:36:18,711 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:36:18,712 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:36:18,806 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:36:18,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:36:18,812 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:36:18,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:36:18 BoogieIcfgContainer [2022-01-10 06:36:18,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:36:18,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:36:18,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:36:18,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:36:18,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:36:18" (1/3) ... [2022-01-10 06:36:18,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9c773b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:36:18, skipping insertion in model container [2022-01-10 06:36:18,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:36:18" (2/3) ... [2022-01-10 06:36:18,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9c773b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:36:18, skipping insertion in model container [2022-01-10 06:36:18,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:36:18" (3/3) ... [2022-01-10 06:36:18,820 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2022-01-10 06:36:18,825 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:36:18,825 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:36:18,876 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:36:18,896 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 06:36:18,896 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:36:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 06:36:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 06:36:18,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:18,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:18,921 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:18,945 INFO L85 PathProgramCache]: Analyzing trace with hash -273059606, now seen corresponding path program 1 times [2022-01-10 06:36:18,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:18,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61975685] [2022-01-10 06:36:18,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:18,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:18,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:18,963 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 06:36:18,965 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 06:36:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:19,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:36:19,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:19,188 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 06:36:19,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:36:19,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:19,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61975685] [2022-01-10 06:36:19,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61975685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:36:19,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:36:19,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:36:19,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393703203] [2022-01-10 06:36:19,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:36:19,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:36:19,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:19,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:36:19,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:36:19,218 INFO L87 Difference]: Start difference. First operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 06:36:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:19,307 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-01-10 06:36:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:36:19,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 12 [2022-01-10 06:36:19,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:19,316 INFO L225 Difference]: With dead ends: 51 [2022-01-10 06:36:19,316 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 06:36:19,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 06:36:19,322 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:19,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 86 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:19,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 06:36:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-10 06:36:19,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-10 06:36:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-01-10 06:36:19,355 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2022-01-10 06:36:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:19,355 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-01-10 06:36:19,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 06:36:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-01-10 06:36:19,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 06:36:19,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:19,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:19,370 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 06:36:19,566 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 06:36:19,566 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1399945439, now seen corresponding path program 1 times [2022-01-10 06:36:19,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:19,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480813529] [2022-01-10 06:36:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:19,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:19,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:19,570 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 06:36:19,571 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 06:36:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:19,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 06:36:19,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:36:19,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:19,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 06:36:19,910 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:19,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480813529] [2022-01-10 06:36:19,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480813529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:19,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:19,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-10 06:36:19,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290486301] [2022-01-10 06:36:19,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:19,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:36:19,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:19,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:36:19,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:36:19,916 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 06:36:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:20,157 INFO L93 Difference]: Finished difference Result 60 states and 105 transitions. [2022-01-10 06:36:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:36:20,158 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 19 [2022-01-10 06:36:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:20,160 INFO L225 Difference]: With dead ends: 60 [2022-01-10 06:36:20,161 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 06:36:20,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-01-10 06:36:20,163 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:20,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 98 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:36:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 06:36:20,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-10 06:36:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 24 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (15), 12 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-10 06:36:20,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2022-01-10 06:36:20,178 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 19 [2022-01-10 06:36:20,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:20,178 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2022-01-10 06:36:20,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 06:36:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2022-01-10 06:36:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 06:36:20,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:20,180 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:20,198 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 06:36:20,391 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 06:36:20,392 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:20,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1950032110, now seen corresponding path program 2 times [2022-01-10 06:36:20,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:20,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55849401] [2022-01-10 06:36:20,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:36:20,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:20,398 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 06:36:20,399 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 06:36:20,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:36:20,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:20,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:36:20,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:36:20,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 06:36:20,685 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:20,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55849401] [2022-01-10 06:36:20,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55849401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:20,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:20,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2022-01-10 06:36:20,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635633678] [2022-01-10 06:36:20,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:20,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 06:36:20,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:20,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 06:36:20,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:36:20,692 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-10 06:36:20,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:20,886 INFO L93 Difference]: Finished difference Result 105 states and 189 transitions. [2022-01-10 06:36:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:36:20,887 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 26 [2022-01-10 06:36:20,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:20,890 INFO L225 Difference]: With dead ends: 105 [2022-01-10 06:36:20,890 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 06:36:20,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:36:20,892 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:20,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 74 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 06:36:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-01-10 06:36:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (41), 18 states have call predecessors, (41), 13 states have call successors, (41) [2022-01-10 06:36:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 97 transitions. [2022-01-10 06:36:20,909 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 97 transitions. Word has length 26 [2022-01-10 06:36:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:20,910 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 97 transitions. [2022-01-10 06:36:20,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-10 06:36:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 97 transitions. [2022-01-10 06:36:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-10 06:36:20,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:20,914 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:20,927 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 06:36:21,123 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 06:36:21,124 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:21,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:21,124 INFO L85 PathProgramCache]: Analyzing trace with hash 422029344, now seen corresponding path program 1 times [2022-01-10 06:36:21,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:21,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218410189] [2022-01-10 06:36:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:36:21,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:21,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:21,126 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 06:36:21,128 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 06:36:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:36:21,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 06:36:21,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 347 proven. 90 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-01-10 06:36:21,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 97 proven. 188 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2022-01-10 06:36:22,627 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:22,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218410189] [2022-01-10 06:36:22,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218410189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:22,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:22,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2022-01-10 06:36:22,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692828060] [2022-01-10 06:36:22,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:22,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 06:36:22,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:22,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 06:36:22,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-01-10 06:36:22,630 INFO L87 Difference]: Start difference. First operand 60 states and 97 transitions. Second operand has 24 states, 20 states have (on average 2.45) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (13), 2 states have call predecessors, (13), 10 states have return successors, (22), 13 states have call predecessors, (22), 7 states have call successors, (22) [2022-01-10 06:36:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:24,547 INFO L93 Difference]: Finished difference Result 368 states and 1050 transitions. [2022-01-10 06:36:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-10 06:36:24,548 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.45) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (13), 2 states have call predecessors, (13), 10 states have return successors, (22), 13 states have call predecessors, (22), 7 states have call successors, (22) Word has length 114 [2022-01-10 06:36:24,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:24,558 INFO L225 Difference]: With dead ends: 368 [2022-01-10 06:36:24,559 INFO L226 Difference]: Without dead ends: 313 [2022-01-10 06:36:24,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=913, Invalid=4489, Unknown=0, NotChecked=0, Total=5402 [2022-01-10 06:36:24,565 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:24,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 243 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 06:36:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-10 06:36:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 139. [2022-01-10 06:36:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 85 states have internal predecessors, (88), 23 states have call successors, (23), 4 states have call predecessors, (23), 33 states have return successors, (216), 49 states have call predecessors, (216), 23 states have call successors, (216) [2022-01-10 06:36:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 327 transitions. [2022-01-10 06:36:24,626 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 327 transitions. Word has length 114 [2022-01-10 06:36:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:24,626 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 327 transitions. [2022-01-10 06:36:24,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.45) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (13), 2 states have call predecessors, (13), 10 states have return successors, (22), 13 states have call predecessors, (22), 7 states have call successors, (22) [2022-01-10 06:36:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 327 transitions. [2022-01-10 06:36:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-10 06:36:24,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:24,642 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 15, 10, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:24,656 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 06:36:24,852 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 06:36:24,852 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:24,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1409951500, now seen corresponding path program 2 times [2022-01-10 06:36:24,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:24,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384321677] [2022-01-10 06:36:24,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:36:24,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:24,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:24,855 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 06:36:24,856 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 06:36:24,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:36:24,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:24,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 06:36:24,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 763 proven. 75 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2022-01-10 06:36:25,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 127 proven. 421 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2022-01-10 06:36:26,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:26,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384321677] [2022-01-10 06:36:26,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384321677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:26,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:26,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2022-01-10 06:36:26,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113763600] [2022-01-10 06:36:26,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:26,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 06:36:26,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:26,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 06:36:26,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:36:26,617 INFO L87 Difference]: Start difference. First operand 139 states and 327 transitions. Second operand has 25 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 15 states have internal predecessors, (54), 10 states have call successors, (16), 2 states have call predecessors, (16), 11 states have return successors, (25), 14 states have call predecessors, (25), 10 states have call successors, (25) [2022-01-10 06:36:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:28,820 INFO L93 Difference]: Finished difference Result 462 states and 1486 transitions. [2022-01-10 06:36:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-10 06:36:28,828 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 15 states have internal predecessors, (54), 10 states have call successors, (16), 2 states have call predecessors, (16), 11 states have return successors, (25), 14 states have call predecessors, (25), 10 states have call successors, (25) Word has length 162 [2022-01-10 06:36:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:28,834 INFO L225 Difference]: With dead ends: 462 [2022-01-10 06:36:28,835 INFO L226 Difference]: Without dead ends: 284 [2022-01-10 06:36:28,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 297 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1272, Invalid=6918, Unknown=0, NotChecked=0, Total=8190 [2022-01-10 06:36:28,847 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 44 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:28,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 246 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 06:36:28,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-10 06:36:28,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2022-01-10 06:36:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 101 states have internal predecessors, (108), 26 states have call successors, (26), 7 states have call predecessors, (26), 37 states have return successors, (211), 53 states have call predecessors, (211), 26 states have call successors, (211) [2022-01-10 06:36:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 345 transitions. [2022-01-10 06:36:28,900 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 345 transitions. Word has length 162 [2022-01-10 06:36:28,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:28,902 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 345 transitions. [2022-01-10 06:36:28,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 15 states have internal predecessors, (54), 10 states have call successors, (16), 2 states have call predecessors, (16), 11 states have return successors, (25), 14 states have call predecessors, (25), 10 states have call successors, (25) [2022-01-10 06:36:28,902 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 345 transitions. [2022-01-10 06:36:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-10 06:36:28,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:28,907 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 18, 11, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:28,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 06:36:29,118 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 06:36:29,118 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:29,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:29,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1365339094, now seen corresponding path program 3 times [2022-01-10 06:36:29,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:29,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120387818] [2022-01-10 06:36:29,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 06:36:29,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:29,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:29,121 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 06:36:29,121 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 06:36:29,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-10 06:36:29,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:29,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:36:29,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 688 proven. 18 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2022-01-10 06:36:29,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 595 proven. 37 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2022-01-10 06:36:30,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:30,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120387818] [2022-01-10 06:36:30,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120387818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:30,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:30,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2022-01-10 06:36:30,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529455567] [2022-01-10 06:36:30,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:30,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 06:36:30,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:30,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 06:36:30,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-10 06:36:30,597 INFO L87 Difference]: Start difference. First operand 162 states and 345 transitions. Second operand has 12 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) [2022-01-10 06:36:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:30,796 INFO L93 Difference]: Finished difference Result 396 states and 1479 transitions. [2022-01-10 06:36:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 06:36:30,797 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) Word has length 188 [2022-01-10 06:36:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:30,802 INFO L225 Difference]: With dead ends: 396 [2022-01-10 06:36:30,802 INFO L226 Difference]: Without dead ends: 239 [2022-01-10 06:36:30,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-01-10 06:36:30,807 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:30,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 120 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:36:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-10 06:36:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2022-01-10 06:36:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 142 states have (on average 1.0845070422535212) internal successors, (154), 145 states have internal predecessors, (154), 37 states have call successors, (37), 10 states have call predecessors, (37), 55 states have return successors, (491), 79 states have call predecessors, (491), 37 states have call successors, (491) [2022-01-10 06:36:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 682 transitions. [2022-01-10 06:36:30,834 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 682 transitions. Word has length 188 [2022-01-10 06:36:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:30,834 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 682 transitions. [2022-01-10 06:36:30,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (19), 9 states have call predecessors, (19), 7 states have call successors, (19) [2022-01-10 06:36:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 682 transitions. [2022-01-10 06:36:30,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 06:36:30,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:30,837 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:30,849 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 06:36:31,045 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 06:36:31,046 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:31,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1501840422, now seen corresponding path program 4 times [2022-01-10 06:36:31,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:31,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547237623] [2022-01-10 06:36:31,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 06:36:31,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:31,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:31,048 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 06:36:31,050 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 06:36:31,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 06:36:31,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:31,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 06:36:31,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 456 proven. 115 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-01-10 06:36:31,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 141 proven. 290 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2022-01-10 06:36:32,603 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:32,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547237623] [2022-01-10 06:36:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547237623] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:32,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:32,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 27 [2022-01-10 06:36:32,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336235993] [2022-01-10 06:36:32,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:32,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 06:36:32,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:32,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 06:36:32,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-01-10 06:36:32,606 INFO L87 Difference]: Start difference. First operand 235 states and 682 transitions. Second operand has 27 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 17 states have internal predecessors, (59), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 15 states have call predecessors, (28), 12 states have call successors, (28) [2022-01-10 06:36:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:34,902 INFO L93 Difference]: Finished difference Result 999 states and 4696 transitions. [2022-01-10 06:36:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-10 06:36:34,903 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 17 states have internal predecessors, (59), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 15 states have call predecessors, (28), 12 states have call successors, (28) Word has length 124 [2022-01-10 06:36:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:34,933 INFO L225 Difference]: With dead ends: 999 [2022-01-10 06:36:34,933 INFO L226 Difference]: Without dead ends: 769 [2022-01-10 06:36:34,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1458, Invalid=9048, Unknown=0, NotChecked=0, Total=10506 [2022-01-10 06:36:34,952 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:34,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 314 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 06:36:34,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-10 06:36:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 396. [2022-01-10 06:36:35,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 228 states have (on average 1.0745614035087718) internal successors, (245), 231 states have internal predecessors, (245), 74 states have call successors, (74), 14 states have call predecessors, (74), 93 states have return successors, (1474), 150 states have call predecessors, (1474), 74 states have call successors, (1474) [2022-01-10 06:36:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1793 transitions. [2022-01-10 06:36:35,063 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1793 transitions. Word has length 124 [2022-01-10 06:36:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:35,064 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1793 transitions. [2022-01-10 06:36:35,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 17 states have internal predecessors, (59), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 15 states have call predecessors, (28), 12 states have call successors, (28) [2022-01-10 06:36:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1793 transitions. [2022-01-10 06:36:35,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-10 06:36:35,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:35,066 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:35,078 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 06:36:35,276 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 06:36:35,276 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:35,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1710707576, now seen corresponding path program 5 times [2022-01-10 06:36:35,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:35,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765430392] [2022-01-10 06:36:35,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 06:36:35,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:35,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:35,279 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 06:36:35,280 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 06:36:35,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-10 06:36:35,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:35,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-10 06:36:35,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 222 proven. 111 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-01-10 06:36:35,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 234 proven. 121 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-01-10 06:36:37,209 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:37,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765430392] [2022-01-10 06:36:37,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765430392] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:37,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:37,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24] total 38 [2022-01-10 06:36:37,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789741197] [2022-01-10 06:36:37,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:37,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-10 06:36:37,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:37,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-10 06:36:37,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 06:36:37,212 INFO L87 Difference]: Start difference. First operand 396 states and 1793 transitions. Second operand has 38 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 22 states have internal predecessors, (55), 10 states have call successors, (13), 1 states have call predecessors, (13), 16 states have return successors, (25), 19 states have call predecessors, (25), 10 states have call successors, (25) [2022-01-10 06:36:46,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:36:46,442 INFO L93 Difference]: Finished difference Result 4619 states and 43307 transitions. [2022-01-10 06:36:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-01-10 06:36:46,442 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 22 states have internal predecessors, (55), 10 states have call successors, (13), 1 states have call predecessors, (13), 16 states have return successors, (25), 19 states have call predecessors, (25), 10 states have call successors, (25) Word has length 112 [2022-01-10 06:36:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:36:46,895 INFO L225 Difference]: With dead ends: 4619 [2022-01-10 06:36:46,896 INFO L226 Difference]: Without dead ends: 4228 [2022-01-10 06:36:47,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22203 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=8127, Invalid=54623, Unknown=0, NotChecked=0, Total=62750 [2022-01-10 06:36:47,005 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 3587 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 4200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 3587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 06:36:47,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 331 Invalid, 4200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [613 Valid, 3587 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-10 06:36:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4228 states. [2022-01-10 06:36:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4228 to 947. [2022-01-10 06:36:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 566 states have (on average 1.030035335689046) internal successors, (583), 569 states have internal predecessors, (583), 118 states have call successors, (118), 14 states have call predecessors, (118), 262 states have return successors, (8648), 363 states have call predecessors, (8648), 118 states have call successors, (8648) [2022-01-10 06:36:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 9349 transitions. [2022-01-10 06:36:48,287 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 9349 transitions. Word has length 112 [2022-01-10 06:36:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:36:48,288 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 9349 transitions. [2022-01-10 06:36:48,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 22 states have internal predecessors, (55), 10 states have call successors, (13), 1 states have call predecessors, (13), 16 states have return successors, (25), 19 states have call predecessors, (25), 10 states have call successors, (25) [2022-01-10 06:36:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 9349 transitions. [2022-01-10 06:36:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-10 06:36:48,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:36:48,292 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:36:48,306 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 06:36:48,502 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 06:36:48,502 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:36:48,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:36:48,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2121875738, now seen corresponding path program 6 times [2022-01-10 06:36:48,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:36:48,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038219608] [2022-01-10 06:36:48,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 06:36:48,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:36:48,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:36:48,504 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 06:36:48,505 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 06:36:48,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-01-10 06:36:48,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:36:48,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-10 06:36:48,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:36:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 372 proven. 300 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2022-01-10 06:36:48,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:36:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 394 proven. 324 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-01-10 06:36:50,861 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:36:50,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038219608] [2022-01-10 06:36:50,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038219608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:36:50,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:36:50,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27] total 41 [2022-01-10 06:36:50,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122820063] [2022-01-10 06:36:50,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:36:50,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-10 06:36:50,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:36:50,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-10 06:36:50,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 06:36:50,863 INFO L87 Difference]: Start difference. First operand 947 states and 9349 transitions. Second operand has 41 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 25 states have internal predecessors, (68), 17 states have call successors, (20), 1 states have call predecessors, (20), 19 states have return successors, (34), 22 states have call predecessors, (34), 17 states have call successors, (34)