/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/mannadiv_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:25:36,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:25:36,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:25:36,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:25:36,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 03:25:36,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 03:25:36,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 03:25:36,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 03:25:36,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 03:25:36,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 03:25:36,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 03:25:36,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 03:25:36,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 03:25:36,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 03:25:36,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 03:25:36,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 03:25:36,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 03:25:36,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:25:36,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:25:36,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:25:36,489 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 03:25:36,526 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:25:36,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:25:36,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:25:36,527 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:25:36,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:25:36,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:25:36,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:25:36,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:25:36,528 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:25:36,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:25:36,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:25:36,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:25:36,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:25:36,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:25:36,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:25:36,529 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:25:36,529 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:25:36,529 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:25:36,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:25:36,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:25:36,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:25:36,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:25:36,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:25:36,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:25:36,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:25:36,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:25:36,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:25:36,530 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:25:36,530 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:25:36,530 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:25:36,530 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:25:36,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:25:36,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:25:36,530 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:25:36,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:25:36,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:25:36,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:25:36,703 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:25:36,704 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:25:36,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound50.c [2022-01-10 03:25:36,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24cc9caa6/d25814d3c3244dde8479d44dcbc7ee05/FLAG0a45bcd55 [2022-01-10 03:25:37,116 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:25:37,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound50.c [2022-01-10 03:25:37,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24cc9caa6/d25814d3c3244dde8479d44dcbc7ee05/FLAG0a45bcd55 [2022-01-10 03:25:37,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24cc9caa6/d25814d3c3244dde8479d44dcbc7ee05 [2022-01-10 03:25:37,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:25:37,134 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:25:37,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:25:37,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:25:37,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:25:37,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:25:37" (1/1) ... [2022-01-10 03:25:37,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df69946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37, skipping insertion in model container [2022-01-10 03:25:37,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:25:37" (1/1) ... [2022-01-10 03:25:37,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:25:37,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:25:37,302 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/mannadiv_unwindbound50.c[573,586] [2022-01-10 03:25:37,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:25:37,324 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:25:37,334 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/mannadiv_unwindbound50.c[573,586] [2022-01-10 03:25:37,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:25:37,352 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:25:37,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37 WrapperNode [2022-01-10 03:25:37,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:25:37,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:25:37,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:25:37,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:25:37,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37" (1/1) ... [2022-01-10 03:25:37,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37" (1/1) ... [2022-01-10 03:25:37,383 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2022-01-10 03:25:37,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:25:37,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:25:37,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:25:37,384 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:25:37,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37" (1/1) ... [2022-01-10 03:25:37,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37" (1/1) ... [2022-01-10 03:25:37,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37" (1/1) ... [2022-01-10 03:25:37,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37" (1/1) ... [2022-01-10 03:25:37,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37" (1/1) ... [2022-01-10 03:25:37,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37" (1/1) ... [2022-01-10 03:25:37,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37" (1/1) ... [2022-01-10 03:25:37,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:25:37,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:25:37,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:25:37,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:25:37,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37" (1/1) ... [2022-01-10 03:25:37,406 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:25:37,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:25:37,426 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 03:25:37,432 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 03:25:37,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:25:37,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:25:37,463 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:25:37,463 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:25:37,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:25:37,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:25:37,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:25:37,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:25:37,510 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:25:37,511 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:25:37,602 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:25:37,606 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:25:37,606 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 03:25:37,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:25:37 BoogieIcfgContainer [2022-01-10 03:25:37,607 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:25:37,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:25:37,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:25:37,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:25:37,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:25:37" (1/3) ... [2022-01-10 03:25:37,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154be9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:25:37, skipping insertion in model container [2022-01-10 03:25:37,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:25:37" (2/3) ... [2022-01-10 03:25:37,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154be9bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:25:37, skipping insertion in model container [2022-01-10 03:25:37,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:25:37" (3/3) ... [2022-01-10 03:25:37,612 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound50.c [2022-01-10 03:25:37,616 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:25:37,616 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:25:37,645 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:25:37,649 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 03:25:37,649 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:25:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:25:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 03:25:37,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:25:37,666 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:25:37,666 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:25:37,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:25:37,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1086166160, now seen corresponding path program 1 times [2022-01-10 03:25:37,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:25:37,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101625649] [2022-01-10 03:25:37,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:25:37,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:25:37,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:25:37,734 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 03:25:37,768 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 03:25:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:25:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:25:37,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:25:37,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:25:37,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:25:37,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101625649] [2022-01-10 03:25:37,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101625649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:25:37,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:25:37,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:25:37,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737897018] [2022-01-10 03:25:37,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:25:37,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:25:37,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:25:37,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:25:37,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:25:37,927 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 03:25:37,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:25:37,944 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-01-10 03:25:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:25:37,946 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-01-10 03:25:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:25:37,954 INFO L225 Difference]: With dead ends: 47 [2022-01-10 03:25:37,955 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 03:25:37,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 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 03:25:37,966 INFO L933 BasicCegarLoop]: 29 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, 29 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 03:25:37,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:25:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 03:25:37,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 03:25:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:25:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-01-10 03:25:38,003 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2022-01-10 03:25:38,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:25:38,003 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-01-10 03:25:38,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 03:25:38,004 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-01-10 03:25:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 03:25:38,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:25:38,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:25:38,030 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 03:25:38,214 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 03:25:38,215 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:25:38,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:25:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1345709874, now seen corresponding path program 1 times [2022-01-10 03:25:38,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:25:38,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079441910] [2022-01-10 03:25:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:25:38,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:25:38,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:25:38,223 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 03:25:38,229 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 03:25:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:25:38,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:25:38,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:25:38,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:25:38,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:25:38,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079441910] [2022-01-10 03:25:38,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079441910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:25:38,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:25:38,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:25:38,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761217090] [2022-01-10 03:25:38,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:25:38,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:25:38,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:25:38,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:25:38,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:25:38,396 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 03:25:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:25:38,417 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-10 03:25:38,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:25:38,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-10 03:25:38,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:25:38,418 INFO L225 Difference]: With dead ends: 30 [2022-01-10 03:25:38,418 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 03:25:38,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:25:38,419 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:25:38,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:25:38,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 03:25:38,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-10 03:25:38,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:25:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-10 03:25:38,424 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2022-01-10 03:25:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:25:38,425 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-10 03:25:38,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 03:25:38,425 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-10 03:25:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 03:25:38,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:25:38,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:25:38,432 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 03:25:38,631 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 03:25:38,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:25:38,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:25:38,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1347497334, now seen corresponding path program 1 times [2022-01-10 03:25:38,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:25:38,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858706808] [2022-01-10 03:25:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:25:38,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:25:38,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:25:38,638 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 03:25:38,640 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 03:25:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:25:38,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:25:38,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:25:38,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:25:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:25:39,060 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:25:39,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858706808] [2022-01-10 03:25:39,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858706808] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:25:39,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:25:39,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-01-10 03:25:39,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763591141] [2022-01-10 03:25:39,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:25:39,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:25:39,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:25:39,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:25:39,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-10 03:25:39,063 INFO L87 Difference]: Start difference. First operand 23 states and 27 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 03:25:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:25:39,122 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-10 03:25:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:25:39,124 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-01-10 03:25:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:25:39,125 INFO L225 Difference]: With dead ends: 30 [2022-01-10 03:25:39,126 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 03:25:39,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:25:39,127 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:25:39,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 84 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-01-10 03:25:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 03:25:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 03:25:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:25:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-10 03:25:39,131 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2022-01-10 03:25:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:25:39,132 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-10 03:25:39,132 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 03:25:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-10 03:25:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 03:25:39,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:25:39,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:25:39,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 03:25:39,338 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 03:25:39,339 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:25:39,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:25:39,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1636478750, now seen corresponding path program 1 times [2022-01-10 03:25:39,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:25:39,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507412355] [2022-01-10 03:25:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:25:39,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:25:39,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:25:39,342 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 03:25:39,344 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 03:25:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:25:39,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:25:39,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:25:39,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:25:39,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:25:39,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507412355] [2022-01-10 03:25:39,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507412355] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:25:39,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [397839926] [2022-01-10 03:25:39,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:25:39,897 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:25:39,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:25:39,902 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:25:39,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-01-10 03:25:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:25:40,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:25:40,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:25:40,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:25:40,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [397839926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:25:40,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:25:40,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 10 [2022-01-10 03:25:40,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016019892] [2022-01-10 03:25:40,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:25:40,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:25:40,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:25:40,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:25:40,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:25:40,102 INFO L87 Difference]: Start difference. First operand 28 states and 32 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:25:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:25:40,254 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-01-10 03:25:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:25:40,256 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-01-10 03:25:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:25:40,258 INFO L225 Difference]: With dead ends: 37 [2022-01-10 03:25:40,258 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 03:25:40,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:25:40,259 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:25:40,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 90 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:25:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 03:25:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-10 03:25:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 03:25:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-10 03:25:40,266 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 25 [2022-01-10 03:25:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:25:40,266 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-10 03:25:40,266 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:25:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-10 03:25:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 03:25:40,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:25:40,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:25:40,290 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 03:25:40,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-01-10 03:25:40,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-01-10 03:25:40,688 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:25:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:25:40,690 INFO L85 PathProgramCache]: Analyzing trace with hash -126969667, now seen corresponding path program 1 times [2022-01-10 03:25:40,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:25:40,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216083707] [2022-01-10 03:25:40,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:25:40,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:25:40,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:25:40,692 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 03:25:40,694 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 03:25:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:25:40,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:25:40,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:25:40,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:25:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:25:40,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:25:40,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216083707] [2022-01-10 03:25:40,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216083707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:25:40,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:25:40,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-01-10 03:25:40,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909904214] [2022-01-10 03:25:40,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:25:40,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 03:25:40,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:25:40,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 03:25:40,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 03:25:40,887 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:25:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:25:41,068 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-01-10 03:25:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 03:25:41,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2022-01-10 03:25:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:25:41,070 INFO L225 Difference]: With dead ends: 63 [2022-01-10 03:25:41,070 INFO L226 Difference]: Without dead ends: 56 [2022-01-10 03:25:41,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:25:41,071 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:25:41,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 123 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:25:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-10 03:25:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-01-10 03:25:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 40 states have internal predecessors, (48), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-10 03:25:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-01-10 03:25:41,078 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 28 [2022-01-10 03:25:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:25:41,078 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-01-10 03:25:41,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 5 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:25:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-01-10 03:25:41,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 03:25:41,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:25:41,079 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:25:41,086 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 03:25:41,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:25:41,286 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:25:41,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:25:41,287 INFO L85 PathProgramCache]: Analyzing trace with hash -125182207, now seen corresponding path program 1 times [2022-01-10 03:25:41,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:25:41,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841937133] [2022-01-10 03:25:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:25:41,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:25:41,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:25:41,289 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:25:41,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 03:25:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:25:41,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 03:25:41,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:25:41,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:25:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:25:42,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:25:42,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841937133] [2022-01-10 03:25:42,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841937133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:25:42,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:25:42,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2022-01-10 03:25:42,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29532012] [2022-01-10 03:25:42,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:25:42,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 03:25:42,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:25:42,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 03:25:42,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:25:42,615 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:25:46,417 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 03:25:49,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:25:50,262 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:25:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:25:50,297 INFO L93 Difference]: Finished difference Result 116 states and 146 transitions. [2022-01-10 03:25:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 03:25:50,300 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2022-01-10 03:25:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:25:50,301 INFO L225 Difference]: With dead ends: 116 [2022-01-10 03:25:50,301 INFO L226 Difference]: Without dead ends: 90 [2022-01-10 03:25:50,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:25:50,302 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 29 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:25:50,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 167 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 155 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-01-10 03:25:50,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-10 03:25:50,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-01-10 03:25:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 65 states have internal predecessors, (81), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 03:25:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2022-01-10 03:25:50,316 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 28 [2022-01-10 03:25:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:25:50,317 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2022-01-10 03:25:50,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:25:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2022-01-10 03:25:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 03:25:50,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:25:50,318 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:25:50,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 03:25:50,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:25:50,526 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:25:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:25:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash -407057303, now seen corresponding path program 1 times [2022-01-10 03:25:50,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:25:50,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791879968] [2022-01-10 03:25:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:25:50,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:25:50,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:25:50,530 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 03:25:50,571 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 03:25:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:25:50,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 03:25:50,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 03:25:50,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:25:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 03:25:51,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:25:51,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791879968] [2022-01-10 03:25:51,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791879968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:25:51,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:25:51,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 16 [2022-01-10 03:25:51,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47047187] [2022-01-10 03:25:51,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:25:51,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 03:25:51,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:25:51,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 03:25:51,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:25:51,883 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 03:25:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:25:52,817 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2022-01-10 03:25:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 03:25:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 34 [2022-01-10 03:25:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:25:52,820 INFO L225 Difference]: With dead ends: 100 [2022-01-10 03:25:52,820 INFO L226 Difference]: Without dead ends: 84 [2022-01-10 03:25:52,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-10 03:25:52,821 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:25:52,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 123 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:25:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-10 03:25:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-01-10 03:25:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.171875) internal successors, (75), 65 states have internal predecessors, (75), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 03:25:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2022-01-10 03:25:52,830 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 34 [2022-01-10 03:25:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:25:52,830 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2022-01-10 03:25:52,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 03:25:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2022-01-10 03:25:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 03:25:52,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:25:52,832 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:25:52,846 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 03:25:53,039 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 03:25:53,040 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:25:53,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:25:53,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1487344618, now seen corresponding path program 1 times [2022-01-10 03:25:53,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:25:53,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130095899] [2022-01-10 03:25:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:25:53,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:25:53,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:25:53,041 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 03:25:53,043 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 03:25:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:25:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 03:25:53,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:25:53,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:25:53,897 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:25:53,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130095899] [2022-01-10 03:25:53,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130095899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:25:53,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1183825478] [2022-01-10 03:25:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:25:53,897 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:25:53,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:25:53,898 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:25:53,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-01-10 03:25:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:25:53,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:25:53,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 03:25:54,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:25:54,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1183825478] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:25:54,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:25:54,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2022-01-10 03:25:54,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648546362] [2022-01-10 03:25:54,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:25:54,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 03:25:54,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:25:54,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 03:25:54,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:25:54,387 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 03:25:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:25:54,672 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2022-01-10 03:25:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:25:54,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 37 [2022-01-10 03:25:54,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:25:54,674 INFO L225 Difference]: With dead ends: 86 [2022-01-10 03:25:54,675 INFO L226 Difference]: Without dead ends: 84 [2022-01-10 03:25:54,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:25:54,675 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:25:54,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 167 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:25:54,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-10 03:25:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-01-10 03:25:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.15625) internal successors, (74), 65 states have internal predecessors, (74), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 03:25:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-01-10 03:25:54,682 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 37 [2022-01-10 03:25:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:25:54,682 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-01-10 03:25:54,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 03:25:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-01-10 03:25:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 03:25:54,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:25:54,688 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:25:54,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2022-01-10 03:25:54,896 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 03:25:55,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:25:55,090 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:25:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:25:55,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1736881443, now seen corresponding path program 1 times [2022-01-10 03:25:55,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:25:55,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835949105] [2022-01-10 03:25:55,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:25:55,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:25:55,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:25:55,093 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:25:55,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 03:25:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:25:55,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:25:55,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:25:55,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:25:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:25:55,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:25:55,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835949105] [2022-01-10 03:25:55,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835949105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:25:55,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:25:55,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-01-10 03:25:55,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448884891] [2022-01-10 03:25:55,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:25:55,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:25:55,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:25:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:25:55,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:25:55,361 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 03:25:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:25:55,391 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2022-01-10 03:25:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:25:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2022-01-10 03:25:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:25:55,394 INFO L225 Difference]: With dead ends: 128 [2022-01-10 03:25:55,394 INFO L226 Difference]: Without dead ends: 105 [2022-01-10 03:25:55,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:25:55,398 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:25:55,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 95 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:25:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-10 03:25:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-01-10 03:25:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 80 states have internal predecessors, (90), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-10 03:25:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2022-01-10 03:25:55,411 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 46 [2022-01-10 03:25:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:25:55,412 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2022-01-10 03:25:55,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 03:25:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2022-01-10 03:25:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 03:25:55,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:25:55,412 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:25:55,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 03:25:55,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:25:55,621 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:25:55,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:25:55,622 INFO L85 PathProgramCache]: Analyzing trace with hash 102422691, now seen corresponding path program 2 times [2022-01-10 03:25:55,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:25:55,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863832791] [2022-01-10 03:25:55,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:25:55,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:25:55,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:25:55,623 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:25:55,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 03:25:55,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:25:55,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:25:55,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:25:55,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:25:55,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:25:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:25:55,854 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:25:55,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863832791] [2022-01-10 03:25:55,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863832791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:25:55,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:25:55,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-01-10 03:25:55,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131089794] [2022-01-10 03:25:55,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:25:55,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:25:55,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:25:55,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:25:55,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:25:55,855 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 03:25:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:25:55,893 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2022-01-10 03:25:55,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:25:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2022-01-10 03:25:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:25:55,894 INFO L225 Difference]: With dead ends: 115 [2022-01-10 03:25:55,894 INFO L226 Difference]: Without dead ends: 101 [2022-01-10 03:25:55,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:25:55,895 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:25:55,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 102 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:25:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-10 03:25:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-01-10 03:25:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 76 states have (on average 1.131578947368421) internal successors, (86), 78 states have internal predecessors, (86), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-10 03:25:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2022-01-10 03:25:55,903 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 46 [2022-01-10 03:25:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:25:55,903 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2022-01-10 03:25:55,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 03:25:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2022-01-10 03:25:55,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 03:25:55,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:25:55,904 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:25:55,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 03:25:56,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:25:56,112 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:25:56,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:25:56,112 INFO L85 PathProgramCache]: Analyzing trace with hash -918645663, now seen corresponding path program 3 times [2022-01-10 03:25:56,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:25:56,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61838673] [2022-01-10 03:25:56,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:25:56,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:25:56,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:25:56,115 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:25:56,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 03:25:56,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 03:25:56,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:25:56,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 03:25:56,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 03:25:57,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:26:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 03:26:02,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:26:02,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61838673] [2022-01-10 03:26:02,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61838673] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:26:02,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:26:02,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2022-01-10 03:26:02,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210002221] [2022-01-10 03:26:02,417 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:26:02,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 03:26:02,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:26:02,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 03:26:02,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-01-10 03:26:02,418 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 14 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 03:26:06,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:26:12,553 WARN L534 Checker$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 03:26:12,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:26:12,563 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2022-01-10 03:26:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 03:26:12,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 14 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2022-01-10 03:26:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:26:12,566 INFO L225 Difference]: With dead ends: 126 [2022-01-10 03:26:12,566 INFO L226 Difference]: Without dead ends: 124 [2022-01-10 03:26:12,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-01-10 03:26:12,567 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 37 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:26:12,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 152 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 140 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-01-10 03:26:12,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-10 03:26:12,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2022-01-10 03:26:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 96 states have internal predecessors, (106), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-10 03:26:12,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 141 transitions. [2022-01-10 03:26:12,575 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 141 transitions. Word has length 46 [2022-01-10 03:26:12,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:26:12,575 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 141 transitions. [2022-01-10 03:26:12,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 14 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 03:26:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 141 transitions. [2022-01-10 03:26:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 03:26:12,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:26:12,576 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:26:12,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 03:26:12,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:26:12,777 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:26:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:26:12,777 INFO L85 PathProgramCache]: Analyzing trace with hash 972990450, now seen corresponding path program 2 times [2022-01-10 03:26:12,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:26:12,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363465191] [2022-01-10 03:26:12,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:26:12,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:26:12,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:26:12,779 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:26:12,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 03:26:12,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:26:12,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:26:12,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 03:26:12,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:26:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:26:13,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:26:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 03:26:13,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:26:13,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363465191] [2022-01-10 03:26:13,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363465191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:26:13,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:26:13,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-01-10 03:26:13,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883874255] [2022-01-10 03:26:13,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:26:13,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 03:26:13,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:26:13,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 03:26:13,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:26:13,185 INFO L87 Difference]: Start difference. First operand 121 states and 141 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-10 03:26:13,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:26:13,876 INFO L93 Difference]: Finished difference Result 382 states and 480 transitions. [2022-01-10 03:26:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 03:26:13,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 55 [2022-01-10 03:26:13,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:26:13,879 INFO L225 Difference]: With dead ends: 382 [2022-01-10 03:26:13,879 INFO L226 Difference]: Without dead ends: 375 [2022-01-10 03:26:13,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2022-01-10 03:26:13,880 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 192 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:26:13,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 279 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 03:26:13,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-01-10 03:26:13,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 367. [2022-01-10 03:26:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 287 states have (on average 1.1219512195121952) internal successors, (322), 293 states have internal predecessors, (322), 54 states have call successors, (54), 25 states have call predecessors, (54), 25 states have return successors, (53), 48 states have call predecessors, (53), 53 states have call successors, (53) [2022-01-10 03:26:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 429 transitions. [2022-01-10 03:26:13,897 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 429 transitions. Word has length 55 [2022-01-10 03:26:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:26:13,898 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 429 transitions. [2022-01-10 03:26:13,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-10 03:26:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 429 transitions. [2022-01-10 03:26:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 03:26:13,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:26:13,899 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:26:13,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 03:26:14,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:26:14,107 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:26:14,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:26:14,108 INFO L85 PathProgramCache]: Analyzing trace with hash 408806471, now seen corresponding path program 4 times [2022-01-10 03:26:14,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:26:14,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140157963] [2022-01-10 03:26:14,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:26:14,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:26:14,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:26:14,109 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:26:14,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 03:26:14,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:26:14,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:26:14,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 03:26:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:26:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 23 proven. 73 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 03:26:15,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:26:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 03:26:17,182 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:26:17,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140157963] [2022-01-10 03:26:17,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140157963] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:26:17,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:26:17,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 23 [2022-01-10 03:26:17,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464403187] [2022-01-10 03:26:17,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:26:17,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 03:26:17,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:26:17,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 03:26:17,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-10 03:26:17,183 INFO L87 Difference]: Start difference. First operand 367 states and 429 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-01-10 03:26:19,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:26:21,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:26:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:26:22,353 INFO L93 Difference]: Finished difference Result 504 states and 569 transitions. [2022-01-10 03:26:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 03:26:22,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 64 [2022-01-10 03:26:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:26:22,355 INFO L225 Difference]: With dead ends: 504 [2022-01-10 03:26:22,355 INFO L226 Difference]: Without dead ends: 358 [2022-01-10 03:26:22,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-01-10 03:26:22,356 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 42 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:26:22,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 311 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 387 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-01-10 03:26:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-01-10 03:26:22,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 290. [2022-01-10 03:26:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 225 states have (on average 1.0666666666666667) internal successors, (240), 228 states have internal predecessors, (240), 39 states have call successors, (39), 26 states have call predecessors, (39), 25 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-10 03:26:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 317 transitions. [2022-01-10 03:26:22,388 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 317 transitions. Word has length 64 [2022-01-10 03:26:22,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:26:22,388 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 317 transitions. [2022-01-10 03:26:22,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-01-10 03:26:22,388 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 317 transitions. [2022-01-10 03:26:22,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-10 03:26:22,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:26:22,389 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:26:22,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 03:26:22,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:26:22,590 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:26:22,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:26:22,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1909967598, now seen corresponding path program 3 times [2022-01-10 03:26:22,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:26:22,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923869441] [2022-01-10 03:26:22,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:26:22,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:26:22,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:26:22,592 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:26:22,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 03:26:22,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-10 03:26:22,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:26:22,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 03:26:22,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:26:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:26:23,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:26:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-01-10 03:26:23,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:26:23,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923869441] [2022-01-10 03:26:23,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923869441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:26:23,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:26:23,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2022-01-10 03:26:23,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143836642] [2022-01-10 03:26:23,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:26:23,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 03:26:23,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:26:23,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 03:26:23,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2022-01-10 03:26:23,971 INFO L87 Difference]: Start difference. First operand 290 states and 317 transitions. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-10 03:26:27,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:26:27,416 INFO L93 Difference]: Finished difference Result 571 states and 657 transitions. [2022-01-10 03:26:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-10 03:26:27,416 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 109 [2022-01-10 03:26:27,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:26:27,425 INFO L225 Difference]: With dead ends: 571 [2022-01-10 03:26:27,425 INFO L226 Difference]: Without dead ends: 566 [2022-01-10 03:26:27,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1016, Invalid=2290, Unknown=0, NotChecked=0, Total=3306 [2022-01-10 03:26:27,429 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 880 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:26:27,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 1085 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 03:26:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-01-10 03:26:27,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2022-01-10 03:26:27,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 441 states have (on average 1.0612244897959184) internal successors, (468), 444 states have internal predecessors, (468), 75 states have call successors, (75), 50 states have call predecessors, (75), 49 states have return successors, (74), 71 states have call predecessors, (74), 74 states have call successors, (74) [2022-01-10 03:26:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 617 transitions. [2022-01-10 03:26:27,484 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 617 transitions. Word has length 109 [2022-01-10 03:26:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:26:27,485 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 617 transitions. [2022-01-10 03:26:27,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 23 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-10 03:26:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 617 transitions. [2022-01-10 03:26:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-10 03:26:27,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:26:27,487 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:26:27,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-01-10 03:26:27,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:26:27,698 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:26:27,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:26:27,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1216739502, now seen corresponding path program 4 times [2022-01-10 03:26:27,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:26:27,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373051972] [2022-01-10 03:26:27,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:26:27,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:26:27,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:26:27,700 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:26:27,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 03:26:29,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:26:29,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:26:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-10 03:26:29,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:26:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:26:29,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:26:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-01-10 03:26:31,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:26:31,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373051972] [2022-01-10 03:26:31,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373051972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:26:31,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:26:31,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-01-10 03:26:31,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020682168] [2022-01-10 03:26:31,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:26:31,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-10 03:26:31,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:26:31,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-10 03:26:31,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=1823, Unknown=0, NotChecked=0, Total=2450 [2022-01-10 03:26:31,471 INFO L87 Difference]: Start difference. First operand 566 states and 617 transitions. Second operand has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2022-01-10 03:26:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:26:45,334 INFO L93 Difference]: Finished difference Result 1123 states and 1293 transitions. [2022-01-10 03:26:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-10 03:26:45,335 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) Word has length 217 [2022-01-10 03:26:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:26:45,338 INFO L225 Difference]: With dead ends: 1123 [2022-01-10 03:26:45,338 INFO L226 Difference]: Without dead ends: 1118 [2022-01-10 03:26:45,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2718 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=4097, Invalid=9475, Unknown=0, NotChecked=0, Total=13572 [2022-01-10 03:26:45,341 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 3114 mSDsluCounter, 3480 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 962 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3114 SdHoareTripleChecker+Valid, 3694 SdHoareTripleChecker+Invalid, 3528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 962 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-10 03:26:45,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3114 Valid, 3694 Invalid, 3528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [962 Valid, 2566 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-10 03:26:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-01-10 03:26:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1118. [2022-01-10 03:26:45,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 873 states have (on average 1.0584192439862543) internal successors, (924), 876 states have internal predecessors, (924), 147 states have call successors, (147), 98 states have call predecessors, (147), 97 states have return successors, (146), 143 states have call predecessors, (146), 146 states have call successors, (146) [2022-01-10 03:26:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1217 transitions. [2022-01-10 03:26:45,386 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1217 transitions. Word has length 217 [2022-01-10 03:26:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:26:45,386 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 1217 transitions. [2022-01-10 03:26:45,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.28) internal successors, (264), 50 states have internal predecessors, (264), 47 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (48), 46 states have call predecessors, (48), 46 states have call successors, (48) [2022-01-10 03:26:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1217 transitions. [2022-01-10 03:26:45,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2022-01-10 03:26:45,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:26:45,394 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:26:45,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 03:26:45,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:26:45,626 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:26:45,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:26:45,627 INFO L85 PathProgramCache]: Analyzing trace with hash -623866926, now seen corresponding path program 5 times [2022-01-10 03:26:45,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:26:45,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625016819] [2022-01-10 03:26:45,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:26:45,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:26:45,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:26:45,628 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:26:45,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 03:26:51,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-10 03:26:51,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:26:51,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 97 conjunts are in the unsatisfiable core [2022-01-10 03:26:51,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:26:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:26:53,179 INFO L328 TraceCheckSpWp]: Computing backward predicates...