/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/cohendiv-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:03:25,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:03:25,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:03:25,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:03:25,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 03:03:25,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 03:03:25,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 03:03:25,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 03:03:25,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 03:03:25,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 03:03:25,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 03:03:25,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 03:03:25,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 03:03:25,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 03:03:25,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 03:03:25,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 03:03:25,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 03:03:25,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:03:25,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:03:25,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:03:25,493 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 03:03:25,507 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:03:25,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:03:25,508 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:03:25,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:03:25,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:03:25,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:03:25,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:03:25,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:03:25,509 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:03:25,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:03:25,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:03:25,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:03:25,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:03:25,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:03:25,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:03:25,510 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:03:25,510 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:03:25,510 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:03:25,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:03:25,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:03:25,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:03:25,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:03:25,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:03:25,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:03:25,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:03:25,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:03:25,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:03:25,511 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:03:25,511 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:03:25,511 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:03:25,511 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:03:25,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:03:25,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:03:25,512 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:03:25,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:03:25,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:03:25,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:03:25,694 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:03:25,696 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:03:25,698 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound50.c [2022-01-10 03:03:25,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b70220d27/8282886ba2ee406ea44b938bf0a903dc/FLAG064304828 [2022-01-10 03:03:26,118 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:03:26,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound50.c [2022-01-10 03:03:26,126 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b70220d27/8282886ba2ee406ea44b938bf0a903dc/FLAG064304828 [2022-01-10 03:03:26,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b70220d27/8282886ba2ee406ea44b938bf0a903dc [2022-01-10 03:03:26,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:03:26,143 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:03:26,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:03:26,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:03:26,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:03:26,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:03:26" (1/1) ... [2022-01-10 03:03:26,147 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748f4d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26, skipping insertion in model container [2022-01-10 03:03:26,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:03:26" (1/1) ... [2022-01-10 03:03:26,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:03:26,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:03:26,257 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/cohendiv-ll_valuebound50.c[576,589] [2022-01-10 03:03:26,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:03:26,283 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:03:26,327 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/cohendiv-ll_valuebound50.c[576,589] [2022-01-10 03:03:26,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:03:26,341 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:03:26,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26 WrapperNode [2022-01-10 03:03:26,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:03:26,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:03:26,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:03:26,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:03:26,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26" (1/1) ... [2022-01-10 03:03:26,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26" (1/1) ... [2022-01-10 03:03:26,362 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-01-10 03:03:26,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:03:26,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:03:26,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:03:26,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:03:26,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26" (1/1) ... [2022-01-10 03:03:26,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26" (1/1) ... [2022-01-10 03:03:26,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26" (1/1) ... [2022-01-10 03:03:26,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26" (1/1) ... [2022-01-10 03:03:26,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26" (1/1) ... [2022-01-10 03:03:26,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26" (1/1) ... [2022-01-10 03:03:26,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26" (1/1) ... [2022-01-10 03:03:26,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:03:26,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:03:26,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:03:26,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:03:26,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26" (1/1) ... [2022-01-10 03:03:26,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:03:26,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:03:26,403 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 03:03:26,404 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 03:03:26,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:03:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:03:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:03:26,427 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:03:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:03:26,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:03:26,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:03:26,427 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:03:26,470 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:03:26,471 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:03:26,625 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:03:26,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:03:26,629 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 03:03:26,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:03:26 BoogieIcfgContainer [2022-01-10 03:03:26,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:03:26,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:03:26,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:03:26,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:03:26,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:03:26" (1/3) ... [2022-01-10 03:03:26,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dae252d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:03:26, skipping insertion in model container [2022-01-10 03:03:26,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:03:26" (2/3) ... [2022-01-10 03:03:26,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dae252d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:03:26, skipping insertion in model container [2022-01-10 03:03:26,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:03:26" (3/3) ... [2022-01-10 03:03:26,635 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound50.c [2022-01-10 03:03:26,639 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:03:26,639 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:03:26,685 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:03:26,689 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 03:03:26,690 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:03:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 03:03:26,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 03:03:26,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:03:26,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:03:26,730 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:03:26,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:03:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1418986431, now seen corresponding path program 1 times [2022-01-10 03:03:26,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:03:26,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981637172] [2022-01-10 03:03:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:03:26,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:03:26,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:03:26,750 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 03:03:26,774 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 03:03:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:03:26,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:03:26,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:03:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:03:26,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:03:26,923 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:03:26,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981637172] [2022-01-10 03:03:26,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981637172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:03:26,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:03:26,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:03:26,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684750249] [2022-01-10 03:03:26,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:03:26,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:03:26,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:03:26,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:03:26,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:03:26,949 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:03:26,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:03:26,963 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2022-01-10 03:03:26,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:03:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-01-10 03:03:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:03:26,970 INFO L225 Difference]: With dead ends: 65 [2022-01-10 03:03:26,970 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 03:03:26,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 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 03:03:26,974 INFO L933 BasicCegarLoop]: 43 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, 43 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 03:03:26,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:03:26,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 03:03:27,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 03:03:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-10 03:03:27,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-01-10 03:03:27,010 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 24 [2022-01-10 03:03:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:03:27,010 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-01-10 03:03:27,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:03:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-01-10 03:03:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 03:03:27,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:03:27,011 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:03:27,022 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 03:03:27,219 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 03:03:27,220 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:03:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:03:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash 240368937, now seen corresponding path program 1 times [2022-01-10 03:03:27,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:03:27,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198926654] [2022-01-10 03:03:27,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:03:27,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:03:27,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:03:27,222 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 03:03:27,224 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 03:03:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:03:27,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:03:27,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:03:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:03:27,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:03:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:03:28,293 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:03:28,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198926654] [2022-01-10 03:03:28,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198926654] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:03:28,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:03:28,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-01-10 03:03:28,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542797031] [2022-01-10 03:03:28,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:03:28,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:03:28,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:03:28,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:03:28,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-10 03:03:28,296 INFO L87 Difference]: Start difference. First operand 30 states and 39 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:03:31,380 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 03:03:31,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:03:31,670 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2022-01-10 03:03:31,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:03:31,670 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-01-10 03:03:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:03:31,671 INFO L225 Difference]: With dead ends: 49 [2022-01-10 03:03:31,671 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 03:03:31,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:03:31,673 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:03:31,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 125 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-01-10 03:03:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 03:03:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2022-01-10 03:03:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-10 03:03:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-01-10 03:03:31,681 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 24 [2022-01-10 03:03:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:03:31,681 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-01-10 03:03:31,681 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:03:31,682 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-01-10 03:03:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 03:03:31,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:03:31,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:03:31,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 03:03:31,889 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 03:03:31,890 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:03:31,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:03:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash -854318377, now seen corresponding path program 1 times [2022-01-10 03:03:31,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:03:31,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887315761] [2022-01-10 03:03:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:03:31,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:03:31,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:03:31,892 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 03:03:31,894 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 03:03:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:03:31,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:03:31,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:03:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:03:32,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:03:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:03:33,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:03:33,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887315761] [2022-01-10 03:03:33,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887315761] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:03:33,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:03:33,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-01-10 03:03:33,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118654404] [2022-01-10 03:03:33,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:03:33,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:03:33,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:03:33,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:03:33,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:03:33,725 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:03:35,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:03:35,612 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2022-01-10 03:03:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:03:35,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-01-10 03:03:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:03:35,621 INFO L225 Difference]: With dead ends: 67 [2022-01-10 03:03:35,622 INFO L226 Difference]: Without dead ends: 64 [2022-01-10 03:03:35,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:03:35,623 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 03:03:35,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 135 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 03:03:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-10 03:03:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-01-10 03:03:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 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 03:03:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 85 transitions. [2022-01-10 03:03:35,632 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 85 transitions. Word has length 29 [2022-01-10 03:03:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:03:35,632 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 85 transitions. [2022-01-10 03:03:35,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:03:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 85 transitions. [2022-01-10 03:03:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 03:03:35,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:03:35,633 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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 03:03:35,646 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 03:03:35,842 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 03:03:35,842 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:03:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:03:35,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2056573358, now seen corresponding path program 1 times [2022-01-10 03:03:35,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:03:35,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337132235] [2022-01-10 03:03:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:03:35,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:03:35,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:03:35,844 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 03:03:35,845 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 03:03:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:03:35,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:03:35,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:03:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:03:36,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:03:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:03:36,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:03:36,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337132235] [2022-01-10 03:03:36,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337132235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:03:36,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:03:36,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-01-10 03:03:36,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479359088] [2022-01-10 03:03:36,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:03:36,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 03:03:36,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:03:36,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 03:03:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:03:36,494 INFO L87 Difference]: Start difference. First operand 62 states and 85 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 03:03:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:03:36,734 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2022-01-10 03:03:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 03:03:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 46 [2022-01-10 03:03:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:03:36,738 INFO L225 Difference]: With dead ends: 68 [2022-01-10 03:03:36,738 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 03:03:36,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:03:36,739 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:03:36,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 295 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-01-10 03:03:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 03:03:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-01-10 03:03:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-10 03:03:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2022-01-10 03:03:36,752 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 46 [2022-01-10 03:03:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:03:36,752 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2022-01-10 03:03:36,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-10 03:03:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2022-01-10 03:03:36,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-10 03:03:36,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:03:36,753 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 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 03:03:36,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 03:03:36,954 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 03:03:36,954 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:03:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:03:36,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2085516536, now seen corresponding path program 1 times [2022-01-10 03:03:36,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:03:36,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705419109] [2022-01-10 03:03:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:03:36,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:03:36,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:03:36,956 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 03:03:36,963 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 03:03:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:03:37,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:03:37,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:03:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 03:03:37,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:03:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-10 03:03:52,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:03:52,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705419109] [2022-01-10 03:03:52,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705419109] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:03:52,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:03:52,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2022-01-10 03:03:52,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546189329] [2022-01-10 03:03:52,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:03:52,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 03:03:52,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:03:52,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 03:03:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=388, Unknown=3, NotChecked=0, Total=462 [2022-01-10 03:03:52,856 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand has 22 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-10 03:03:56,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:03:58,225 WARN L534 Checker$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 03:04:05,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:04:05,939 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2022-01-10 03:04:05,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 03:04:05,947 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) Word has length 52 [2022-01-10 03:04:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:04:05,952 INFO L225 Difference]: With dead ends: 74 [2022-01-10 03:04:05,952 INFO L226 Difference]: Without dead ends: 72 [2022-01-10 03:04:05,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=102, Invalid=545, Unknown=3, NotChecked=0, Total=650 [2022-01-10 03:04:05,953 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:04:05,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 269 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 185 Invalid, 2 Unknown, 41 Unchecked, 10.7s Time] [2022-01-10 03:04:05,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-10 03:04:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-01-10 03:04:05,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-10 03:04:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2022-01-10 03:04:05,963 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 52 [2022-01-10 03:04:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:04:05,963 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2022-01-10 03:04:05,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 10 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 9 states have call predecessors, (16), 8 states have call successors, (16) [2022-01-10 03:04:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2022-01-10 03:04:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 03:04:05,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:04:05,965 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 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] [2022-01-10 03:04:05,975 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 03:04:06,165 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 03:04:06,165 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:04:06,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:04:06,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1724367982, now seen corresponding path program 1 times [2022-01-10 03:04:06,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:04:06,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772086115] [2022-01-10 03:04:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:04:06,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:04:06,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:04:06,167 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 03:04:06,168 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 03:04:06,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:04:06,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:04:06,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:04:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-10 03:04:07,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:04:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-10 03:04:25,562 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:04:25,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772086115] [2022-01-10 03:04:25,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772086115] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:04:25,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:04:25,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2022-01-10 03:04:25,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866353393] [2022-01-10 03:04:25,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:04:25,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 03:04:25,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:04:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 03:04:25,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:04:25,563 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-01-10 03:04:32,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:04:37,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:04:42,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:04:44,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []