/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/nla-digbench-scaling/lcm1_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:23:14,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:23:14,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:23:14,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:23:14,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 03:23:14,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 03:23:14,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 03:23:14,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 03:23:14,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 03:23:14,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 03:23:14,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 03:23:14,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 03:23:14,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 03:23:14,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 03:23:14,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 03:23:14,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 03:23:14,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 03:23:14,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:23:14,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:23:14,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:23:14,204 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 03:23:14,226 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:23:14,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:23:14,226 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:23:14,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:23:14,227 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:23:14,227 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:23:14,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:23:14,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:23:14,228 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:23:14,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:23:14,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:23:14,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:23:14,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:23:14,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:23:14,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:23:14,228 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:23:14,228 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:23:14,228 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:23:14,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:23:14,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:23:14,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:23:14,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:23:14,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:23:14,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:23:14,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:23:14,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:23:14,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:23:14,229 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:23:14,229 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:23:14,230 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:23:14,230 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:23:14,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:23:14,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:23:14,230 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:23:14,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:23:14,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:23:14,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:23:14,431 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:23:14,431 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:23:14,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound10.c [2022-01-10 03:23:14,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5307cb3e0/73f7a02929a04d0e92cb2d662aad8a73/FLAGd61997cf5 [2022-01-10 03:23:14,835 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:23:14,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound10.c [2022-01-10 03:23:14,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5307cb3e0/73f7a02929a04d0e92cb2d662aad8a73/FLAGd61997cf5 [2022-01-10 03:23:15,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5307cb3e0/73f7a02929a04d0e92cb2d662aad8a73 [2022-01-10 03:23:15,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:23:15,272 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:23:15,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:23:15,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:23:15,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:23:15,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:23:15" (1/1) ... [2022-01-10 03:23:15,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@557dec21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15, skipping insertion in model container [2022-01-10 03:23:15,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:23:15" (1/1) ... [2022-01-10 03:23:15,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:23:15,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:23:15,420 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound10.c[552,565] [2022-01-10 03:23:15,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:23:15,447 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:23:15,462 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound10.c[552,565] [2022-01-10 03:23:15,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:23:15,479 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:23:15,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15 WrapperNode [2022-01-10 03:23:15,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:23:15,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:23:15,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:23:15,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:23:15,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15" (1/1) ... [2022-01-10 03:23:15,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15" (1/1) ... [2022-01-10 03:23:15,513 INFO L137 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 66 [2022-01-10 03:23:15,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:23:15,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:23:15,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:23:15,513 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:23:15,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15" (1/1) ... [2022-01-10 03:23:15,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15" (1/1) ... [2022-01-10 03:23:15,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15" (1/1) ... [2022-01-10 03:23:15,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15" (1/1) ... [2022-01-10 03:23:15,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15" (1/1) ... [2022-01-10 03:23:15,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15" (1/1) ... [2022-01-10 03:23:15,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15" (1/1) ... [2022-01-10 03:23:15,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:23:15,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:23:15,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:23:15,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:23:15,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15" (1/1) ... [2022-01-10 03:23:15,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:23:15,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:23:15,579 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 03:23:15,604 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 03:23:15,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:23:15,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:23:15,612 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:23:15,612 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:23:15,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:23:15,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:23:15,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:23:15,612 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:23:15,654 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:23:15,655 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:23:15,825 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:23:15,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:23:15,830 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 03:23:15,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:23:15 BoogieIcfgContainer [2022-01-10 03:23:15,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:23:15,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:23:15,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:23:15,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:23:15,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:23:15" (1/3) ... [2022-01-10 03:23:15,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24605eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:23:15, skipping insertion in model container [2022-01-10 03:23:15,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:15" (2/3) ... [2022-01-10 03:23:15,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24605eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:23:15, skipping insertion in model container [2022-01-10 03:23:15,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:23:15" (3/3) ... [2022-01-10 03:23:15,838 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_valuebound10.c [2022-01-10 03:23:15,841 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:23:15,842 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:23:15,888 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:23:15,893 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 03:23:15,893 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:23:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-10 03:23:15,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 03:23:15,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:15,920 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:23:15,920 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:15,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1807347491, now seen corresponding path program 1 times [2022-01-10 03:23:15,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:15,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369570103] [2022-01-10 03:23:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:15,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:15,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:15,936 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 03:23:15,939 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 03:23:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:16,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:23:16,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 03:23:16,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:23:16,141 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:16,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369570103] [2022-01-10 03:23:16,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369570103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:23:16,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:23:16,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:23:16,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847092345] [2022-01-10 03:23:16,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:23:16,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:23:16,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:16,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:23:16,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:23:16,193 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:23:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:23:16,213 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2022-01-10 03:23:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:23:16,215 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-01-10 03:23:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:23:16,221 INFO L225 Difference]: With dead ends: 67 [2022-01-10 03:23:16,221 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 03:23:16,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:23:16,231 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:23:16,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:23:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 03:23:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-10 03:23:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 03:23:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-01-10 03:23:16,268 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-01-10 03:23:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:23:16,268 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-01-10 03:23:16,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:23:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-01-10 03:23:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 03:23:16,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:16,270 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:23:16,279 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 03:23:16,477 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 03:23:16,477 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:16,478 INFO L85 PathProgramCache]: Analyzing trace with hash 197197551, now seen corresponding path program 1 times [2022-01-10 03:23:16,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:16,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823890298] [2022-01-10 03:23:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:16,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:16,480 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 03:23:16,481 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 03:23:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 03:23:16,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 03:23:16,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:23:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-10 03:23:17,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:17,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823890298] [2022-01-10 03:23:17,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823890298] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:23:17,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:23:17,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-01-10 03:23:17,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20611019] [2022-01-10 03:23:17,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:23:17,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:23:17,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:17,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:23:17,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:23:17,779 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:23:20,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:23:22,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:23:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:23:23,036 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-01-10 03:23:23,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:23:23,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-01-10 03:23:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:23:23,045 INFO L225 Difference]: With dead ends: 48 [2022-01-10 03:23:23,045 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 03:23:23,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:23:23,046 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:23:23,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 130 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2022-01-10 03:23:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 03:23:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-01-10 03:23:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-10 03:23:23,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2022-01-10 03:23:23,064 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 39 [2022-01-10 03:23:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:23:23,064 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2022-01-10 03:23:23,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:23:23,064 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2022-01-10 03:23:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 03:23:23,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:23,065 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:23:23,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 03:23:23,266 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 03:23:23,267 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash -857401627, now seen corresponding path program 1 times [2022-01-10 03:23:23,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:23,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523418207] [2022-01-10 03:23:23,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:23,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:23,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:23,281 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 03:23:23,282 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 03:23:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:23:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 03:23:23,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:23:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-10 03:23:25,427 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:25,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523418207] [2022-01-10 03:23:25,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523418207] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:23:25,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:23:25,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-01-10 03:23:25,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127446418] [2022-01-10 03:23:25,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:23:25,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:23:25,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:25,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:23:25,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:23:25,429 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 03:23:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:23:26,387 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2022-01-10 03:23:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:23:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-01-10 03:23:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:23:26,393 INFO L225 Difference]: With dead ends: 61 [2022-01-10 03:23:26,394 INFO L226 Difference]: Without dead ends: 59 [2022-01-10 03:23:26,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-10 03:23:26,395 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 03:23:26,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 145 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 03:23:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-10 03:23:26,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-01-10 03:23:26,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-10 03:23:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2022-01-10 03:23:26,403 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 45 [2022-01-10 03:23:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:23:26,403 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2022-01-10 03:23:26,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 03:23:26,403 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2022-01-10 03:23:26,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 03:23:26,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:26,404 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:23:26,412 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 03:23:26,612 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 03:23:26,612 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:26,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1563788950, now seen corresponding path program 1 times [2022-01-10 03:23:26,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:26,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510731049] [2022-01-10 03:23:26,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:26,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:26,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:26,614 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 03:23:26,619 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 03:23:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:26,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:23:26,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-10 03:23:26,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:23:26,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:26,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510731049] [2022-01-10 03:23:26,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510731049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:23:26,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:23:26,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:23:26,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325742053] [2022-01-10 03:23:26,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:23:26,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:23:26,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:26,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:23:26,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:23:26,766 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 03:23:26,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:23:26,914 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2022-01-10 03:23:26,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:23:26,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-01-10 03:23:26,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:23:26,917 INFO L225 Difference]: With dead ends: 64 [2022-01-10 03:23:26,917 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 03:23:26,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:23:26,918 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:23:26,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 152 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:23:26,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 03:23:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-10 03:23:26,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.25) internal successors, (40), 33 states have internal predecessors, (40), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 03:23:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2022-01-10 03:23:26,924 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 50 [2022-01-10 03:23:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:23:26,925 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2022-01-10 03:23:26,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 03:23:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2022-01-10 03:23:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 03:23:26,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:26,926 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:23:26,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 03:23:27,126 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 03:23:27,127 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash 696987010, now seen corresponding path program 1 times [2022-01-10 03:23:27,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:27,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303820914] [2022-01-10 03:23:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:27,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:27,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:27,131 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 03:23:27,132 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 03:23:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:27,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 03:23:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-10 03:23:27,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:23:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-01-10 03:23:32,025 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:32,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303820914] [2022-01-10 03:23:32,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303820914] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:23:32,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:23:32,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 19 [2022-01-10 03:23:32,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661775337] [2022-01-10 03:23:32,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:23:32,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 03:23:32,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:32,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 03:23:32,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:23:32,027 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-10 03:23:37,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:23:39,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:23:40,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:23:40,350 INFO L93 Difference]: Finished difference Result 84 states and 115 transitions. [2022-01-10 03:23:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 03:23:40,356 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 53 [2022-01-10 03:23:40,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:23:40,359 INFO L225 Difference]: With dead ends: 84 [2022-01-10 03:23:40,359 INFO L226 Difference]: Without dead ends: 82 [2022-01-10 03:23:40,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:23:40,360 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:23:40,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 265 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 393 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2022-01-10 03:23:40,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-10 03:23:40,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2022-01-10 03:23:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 50 states have internal predecessors, (61), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-10 03:23:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2022-01-10 03:23:40,370 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 53 [2022-01-10 03:23:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:23:40,371 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2022-01-10 03:23:40,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-10 03:23:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2022-01-10 03:23:40,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 03:23:40,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:40,385 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:23:40,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 03:23:40,592 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 03:23:40,593 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:40,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1380457715, now seen corresponding path program 1 times [2022-01-10 03:23:40,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:40,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921230848] [2022-01-10 03:23:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:40,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:40,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:40,596 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 03:23:40,597 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 03:23:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:40,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-10 03:23:40,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 03:23:41,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:23:49,100 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:49,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921230848] [2022-01-10 03:23:49,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921230848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:23:49,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1732327747] [2022-01-10 03:23:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:49,101 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:23:49,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:23:49,103 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:23:49,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-01-10 03:23:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:49,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:23:49,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-10 03:23:49,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:23:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-10 03:23:53,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1732327747] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:23:53,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:23:53,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17, 7] total 22 [2022-01-10 03:23:53,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046089216] [2022-01-10 03:23:53,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:23:53,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:23:53,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:53,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:23:53,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=482, Unknown=2, NotChecked=0, Total=600 [2022-01-10 03:23:53,368 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 03:23:55,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:23:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:23:56,453 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2022-01-10 03:23:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:23:56,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 67 [2022-01-10 03:23:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:23:56,459 INFO L225 Difference]: With dead ends: 104 [2022-01-10 03:23:56,459 INFO L226 Difference]: Without dead ends: 102 [2022-01-10 03:23:56,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=120, Invalid=528, Unknown=2, NotChecked=0, Total=650 [2022-01-10 03:23:56,461 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:23:56,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 120 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-01-10 03:23:56,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-10 03:23:56,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-01-10 03:23:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 68 states have internal predecessors, (82), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-10 03:23:56,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 139 transitions. [2022-01-10 03:23:56,474 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 139 transitions. Word has length 67 [2022-01-10 03:23:56,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:23:56,474 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 139 transitions. [2022-01-10 03:23:56,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 03:23:56,474 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 139 transitions. [2022-01-10 03:23:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 03:23:56,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:56,475 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:23:56,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-01-10 03:23:56,686 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 03:23:56,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:23:56,876 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:56,876 INFO L85 PathProgramCache]: Analyzing trace with hash 597113487, now seen corresponding path program 1 times [2022-01-10 03:23:56,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:56,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686872962] [2022-01-10 03:23:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:56,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:56,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:56,879 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 03:23:56,880 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 03:23:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:56,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 03:23:56,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-01-10 03:23:57,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:24:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 03:24:02,719 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:24:02,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686872962] [2022-01-10 03:24:02,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686872962] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:24:02,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:24:02,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 19 [2022-01-10 03:24:02,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515427249] [2022-01-10 03:24:02,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:24:02,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 03:24:02,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:24:02,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 03:24:02,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:24:02,721 INFO L87 Difference]: Start difference. First operand 101 states and 139 transitions. Second operand has 19 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 10 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-01-10 03:24:06,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:10,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:13,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:24:14,060 INFO L93 Difference]: Finished difference Result 228 states and 314 transitions. [2022-01-10 03:24:14,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 03:24:14,069 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 10 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 73 [2022-01-10 03:24:14,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:24:14,070 INFO L225 Difference]: With dead ends: 228 [2022-01-10 03:24:14,070 INFO L226 Difference]: Without dead ends: 131 [2022-01-10 03:24:14,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-01-10 03:24:14,072 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 63 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:24:14,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 248 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 428 Invalid, 3 Unknown, 0 Unchecked, 8.6s Time] [2022-01-10 03:24:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-10 03:24:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 76. [2022-01-10 03:24:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-10 03:24:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-01-10 03:24:14,092 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 73 [2022-01-10 03:24:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:24:14,093 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-01-10 03:24:14,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 10 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-01-10 03:24:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-01-10 03:24:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 03:24:14,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:24:14,094 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:24:14,102 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 03:24:14,302 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 03:24:14,303 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:24:14,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:24:14,303 INFO L85 PathProgramCache]: Analyzing trace with hash -2125426086, now seen corresponding path program 1 times [2022-01-10 03:24:14,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:24:14,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161991258] [2022-01-10 03:24:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:24:14,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:24:14,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:24:14,305 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 03:24:14,306 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 03:24:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:24:14,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-10 03:24:14,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:24:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 23 proven. 39 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-10 03:24:18,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:24:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-01-10 03:24:22,603 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:24:22,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161991258] [2022-01-10 03:24:22,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161991258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:24:22,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:24:22,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7] total 22 [2022-01-10 03:24:22,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514188260] [2022-01-10 03:24:22,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:24:22,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 03:24:22,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:24:22,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 03:24:22,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-10 03:24:22,605 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 22 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 11 states have call predecessors, (21), 10 states have call successors, (21) [2022-01-10 03:24:27,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:30,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:32,099 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:34,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:24:34,536 INFO L93 Difference]: Finished difference Result 126 states and 165 transitions. [2022-01-10 03:24:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 03:24:34,538 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 11 states have call predecessors, (21), 10 states have call successors, (21) Word has length 74 [2022-01-10 03:24:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:24:34,539 INFO L225 Difference]: With dead ends: 126 [2022-01-10 03:24:34,539 INFO L226 Difference]: Without dead ends: 0 [2022-01-10 03:24:34,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-01-10 03:24:34,540 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 85 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 101 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-01-10 03:24:34,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 316 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 508 Invalid, 3 Unknown, 0 Unchecked, 10.5s Time] [2022-01-10 03:24:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-10 03:24:34,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-10 03:24:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:24:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-10 03:24:34,542 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2022-01-10 03:24:34,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:24:34,543 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-10 03:24:34,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.25) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 11 states have call predecessors, (21), 10 states have call successors, (21) [2022-01-10 03:24:34,543 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-10 03:24:34,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-10 03:24:34,545 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 03:24:34,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 03:24:34,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:24:34,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.