/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/divbin_unwindbound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:05:40,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:05:40,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:05:40,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:05:40,360 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 03:05:40,388 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:05:40,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:05:40,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:05:40,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:05:40,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:05:40,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:05:40,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:05:40,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:05:40,391 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:05:40,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:05:40,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:05:40,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:05:40,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:05:40,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:05:40,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:05:40,392 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:05:40,392 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:05:40,392 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:05:40,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:05:40,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:05:40,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:05:40,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:05:40,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:05:40,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:05:40,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:05:40,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:05:40,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:05:40,394 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:05:40,394 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:05:40,394 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:05:40,394 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:05:40,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:05:40,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:05:40,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:05:40,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:05:40,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:05:40,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:05:40,626 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:05:40,631 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:05:40,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i [2022-01-10 03:05:40,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8813907d9/3c1e4abfcf0045bab4fd5dc86d3e718e/FLAG60678e453 [2022-01-10 03:05:41,031 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:05:41,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound10.i [2022-01-10 03:05:41,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8813907d9/3c1e4abfcf0045bab4fd5dc86d3e718e/FLAG60678e453 [2022-01-10 03:05:41,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8813907d9/3c1e4abfcf0045bab4fd5dc86d3e718e [2022-01-10 03:05:41,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:05:41,053 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:05:41,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:05:41,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:05:41,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:05:41,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:05:41" (1/1) ... [2022-01-10 03:05:41,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65b9d11c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41, skipping insertion in model container [2022-01-10 03:05:41,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:05:41" (1/1) ... [2022-01-10 03:05:41,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:05:41,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:05:41,227 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/divbin_unwindbound10.i[950,963] [2022-01-10 03:05:41,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:05:41,248 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:05:41,260 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/divbin_unwindbound10.i[950,963] [2022-01-10 03:05:41,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:05:41,277 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:05:41,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41 WrapperNode [2022-01-10 03:05:41,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:05:41,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:05:41,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:05:41,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:05:41,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41" (1/1) ... [2022-01-10 03:05:41,296 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41" (1/1) ... [2022-01-10 03:05:41,310 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-01-10 03:05:41,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:05:41,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:05:41,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:05:41,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:05:41,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41" (1/1) ... [2022-01-10 03:05:41,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41" (1/1) ... [2022-01-10 03:05:41,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41" (1/1) ... [2022-01-10 03:05:41,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41" (1/1) ... [2022-01-10 03:05:41,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41" (1/1) ... [2022-01-10 03:05:41,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41" (1/1) ... [2022-01-10 03:05:41,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41" (1/1) ... [2022-01-10 03:05:41,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:05:41,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:05:41,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:05:41,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:05:41,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41" (1/1) ... [2022-01-10 03:05:41,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:05:41,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:05:41,369 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 03:05:41,370 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 03:05:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:05:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:05:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:05:41,398 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:05:41,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:05:41,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:05:41,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:05:41,399 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:05:41,448 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:05:41,449 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:05:41,550 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:05:41,555 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:05:41,555 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 03:05:41,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:05:41 BoogieIcfgContainer [2022-01-10 03:05:41,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:05:41,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:05:41,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:05:41,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:05:41,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:05:41" (1/3) ... [2022-01-10 03:05:41,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5712b0fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:05:41, skipping insertion in model container [2022-01-10 03:05:41,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:05:41" (2/3) ... [2022-01-10 03:05:41,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5712b0fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:05:41, skipping insertion in model container [2022-01-10 03:05:41,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:05:41" (3/3) ... [2022-01-10 03:05:41,563 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound10.i [2022-01-10 03:05:41,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:05:41,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:05:41,603 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:05:41,608 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 03:05:41,609 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:05:41,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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 03:05:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 03:05:41,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:05:41,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:05:41,626 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:05:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:05:41,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2022-01-10 03:05:41,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:05:41,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773507881] [2022-01-10 03:05:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:05:41,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:05:41,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:05:41,643 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 03:05:41,654 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 03:05:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:05:41,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:05:41,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:05:41,828 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 03:05:41,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:05:41,829 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:05:41,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773507881] [2022-01-10 03:05:41,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773507881] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:05:41,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:05:41,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:05:41,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114657343] [2022-01-10 03:05:41,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:05:41,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:05:41,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:05:41,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:05:41,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:05:41,864 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 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 5.5) internal successors, (11), 2 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 03:05:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:05:41,877 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-01-10 03:05:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:05:41,883 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 03:05:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:05:41,889 INFO L225 Difference]: With dead ends: 53 [2022-01-10 03:05:41,890 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 03:05:41,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 03:05:41,895 INFO L933 BasicCegarLoop]: 34 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, 34 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 03:05:41,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:05:41,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 03:05:41,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 03:05:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 03:05:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-01-10 03:05:41,922 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2022-01-10 03:05:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:05:41,922 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-01-10 03:05:41,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 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 03:05:41,923 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-01-10 03:05:41,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 03:05:41,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:05:41,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:05:41,935 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 03:05:42,132 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 03:05:42,133 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:05:42,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:05:42,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2022-01-10 03:05:42,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:05:42,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123495095] [2022-01-10 03:05:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:05:42,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:05:42,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:05:42,137 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 03:05:42,139 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 03:05:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:05:42,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:05:42,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:05:42,298 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 03:05:42,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:05:42,298 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:05:42,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123495095] [2022-01-10 03:05:42,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123495095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:05:42,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:05:42,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:05:42,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053734697] [2022-01-10 03:05:42,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:05:42,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:05:42,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:05:42,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:05:42,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:05:42,307 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 03:05:42,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:05:42,332 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-01-10 03:05:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:05:42,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 21 [2022-01-10 03:05:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:05:42,335 INFO L225 Difference]: With dead ends: 38 [2022-01-10 03:05:42,335 INFO L226 Difference]: Without dead ends: 26 [2022-01-10 03:05:42,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 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 03:05:42,338 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:05:42,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:05:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-10 03:05:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-10 03:05:42,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 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 03:05:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-01-10 03:05:42,346 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2022-01-10 03:05:42,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:05:42,347 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-01-10 03:05:42,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 03:05:42,347 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-01-10 03:05:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 03:05:42,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:05:42,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:05:42,359 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 03:05:42,557 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 03:05:42,557 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:05:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:05:42,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2022-01-10 03:05:42,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:05:42,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764096471] [2022-01-10 03:05:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:05:42,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:05:42,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:05:42,563 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 03:05:42,565 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 03:05:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:05:42,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:05:42,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:05:42,880 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 03:05:42,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:05:43,632 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 03:05:43,633 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:05:43,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764096471] [2022-01-10 03:05:43,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764096471] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:05:43,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:05:43,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-01-10 03:05:43,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828327042] [2022-01-10 03:05:43,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:05:43,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:05:43,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:05:43,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:05:43,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:05:43,643 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 03:05:44,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:05:44,041 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-01-10 03:05:44,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:05:44,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 22 [2022-01-10 03:05:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:05:44,044 INFO L225 Difference]: With dead ends: 38 [2022-01-10 03:05:44,044 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 03:05:44,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:05:44,046 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:05:44,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 89 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:05:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 03:05:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-10 03:05:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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 03:05:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-01-10 03:05:44,053 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2022-01-10 03:05:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:05:44,054 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-01-10 03:05:44,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 03:05:44,054 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-01-10 03:05:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 03:05:44,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:05:44,055 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] [2022-01-10 03:05:44,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 03:05:44,264 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 03:05:44,265 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:05:44,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:05:44,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2022-01-10 03:05:44,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:05:44,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34817266] [2022-01-10 03:05:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:05:44,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:05:44,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:05:44,268 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 03:05:44,269 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 03:05:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:05:44,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:05:44,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:05:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:05:44,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:05:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:05:44,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:05:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34817266] [2022-01-10 03:05:44,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34817266] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:05:44,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:05:44,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-01-10 03:05:44,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719926232] [2022-01-10 03:05:44,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:05:44,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 03:05:44,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:05:44,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 03:05:44,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-01-10 03:05:44,485 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:05:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:05:44,691 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2022-01-10 03:05:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 03:05:44,695 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2022-01-10 03:05:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:05:44,696 INFO L225 Difference]: With dead ends: 69 [2022-01-10 03:05:44,697 INFO L226 Difference]: Without dead ends: 57 [2022-01-10 03:05:44,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:05:44,698 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:05:44,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 138 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:05:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-10 03:05:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2022-01-10 03:05:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 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 03:05:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-01-10 03:05:44,707 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2022-01-10 03:05:44,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:05:44,707 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-01-10 03:05:44,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:05:44,708 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-01-10 03:05:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 03:05:44,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:05:44,708 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] [2022-01-10 03:05:44,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 03:05:44,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:05:44,919 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:05:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:05:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2022-01-10 03:05:44,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:05:44,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053155880] [2022-01-10 03:05:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:05:44,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:05:44,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:05:44,922 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:05:44,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 03:05:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:05:44,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:05:44,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:05:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 03:05:45,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:05:45,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:05:45,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053155880] [2022-01-10 03:05:45,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053155880] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:05:45,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:05:45,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:05:45,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698168546] [2022-01-10 03:05:45,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:05:45,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:05:45,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:05:45,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:05:45,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:05:45,071 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 03:05:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:05:45,169 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-01-10 03:05:45,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:05:45,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 25 [2022-01-10 03:05:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:05:45,171 INFO L225 Difference]: With dead ends: 55 [2022-01-10 03:05:45,171 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 03:05:45,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:05:45,172 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:05:45,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 85 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:05:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 03:05:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2022-01-10 03:05:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 36 states have internal predecessors, (45), 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 03:05:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-01-10 03:05:45,179 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2022-01-10 03:05:45,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:05:45,179 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-01-10 03:05:45,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 03:05:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-01-10 03:05:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 03:05:45,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:05:45,181 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, 1, 1, 1] [2022-01-10 03:05:45,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 03:05:45,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:05:45,390 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:05:45,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:05:45,390 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2022-01-10 03:05:45,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:05:45,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780431767] [2022-01-10 03:05:45,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:05:45,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:05:45,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:05:45,392 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 03:05:45,393 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 03:05:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:05:45,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:05:45,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:05:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:05:45,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:05:45,495 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:05:45,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780431767] [2022-01-10 03:05:45,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780431767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:05:45,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:05:45,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:05:45,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049917945] [2022-01-10 03:05:45,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:05:45,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:05:45,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:05:45,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:05:45,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:05:45,497 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 03:05:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:05:45,526 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-01-10 03:05:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:05:45,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 31 [2022-01-10 03:05:45,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:05:45,527 INFO L225 Difference]: With dead ends: 70 [2022-01-10 03:05:45,527 INFO L226 Difference]: Without dead ends: 45 [2022-01-10 03:05:45,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:05:45,528 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:05:45,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:05:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-10 03:05:45,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-01-10 03:05:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 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 03:05:45,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-01-10 03:05:45,534 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2022-01-10 03:05:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:05:45,534 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-01-10 03:05:45,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 03:05:45,535 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-01-10 03:05:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 03:05:45,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:05:45,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:05:45,545 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 03:05:45,739 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 03:05:45,740 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:05:45,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:05:45,740 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2022-01-10 03:05:45,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:05:45,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212580091] [2022-01-10 03:05:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:05:45,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:05:45,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:05:45,742 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 03:05:45,744 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 03:05:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:05:45,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:05:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:05:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:05:46,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:05:49,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:05:49,359 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:05:49,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212580091] [2022-01-10 03:05:49,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212580091] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:05:49,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:05:49,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2022-01-10 03:05:49,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716139511] [2022-01-10 03:05:49,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:05:49,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 03:05:49,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:05:49,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 03:05:49,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:05:49,360 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:05:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:05:50,215 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2022-01-10 03:05:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 03:05:50,217 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2022-01-10 03:05:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:05:50,220 INFO L225 Difference]: With dead ends: 77 [2022-01-10 03:05:50,220 INFO L226 Difference]: Without dead ends: 74 [2022-01-10 03:05:50,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-10 03:05:50,221 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 53 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:05:50,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 281 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 12 Unchecked, 0.6s Time] [2022-01-10 03:05:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-10 03:05:50,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-01-10 03:05:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 59 states have internal predecessors, (69), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 03:05:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2022-01-10 03:05:50,230 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 34 [2022-01-10 03:05:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:05:50,231 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2022-01-10 03:05:50,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 6 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:05:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2022-01-10 03:05:50,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 03:05:50,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:05:50,232 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, 1, 1, 1, 1, 1, 1] [2022-01-10 03:05:50,251 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 03:05:50,441 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 03:05:50,442 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:05:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:05:50,442 INFO L85 PathProgramCache]: Analyzing trace with hash 673628592, now seen corresponding path program 1 times [2022-01-10 03:05:50,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:05:50,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078905720] [2022-01-10 03:05:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:05:50,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:05:50,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:05:50,444 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 03:05:50,446 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 03:05:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:05:50,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:05:50,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:05:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:05:50,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:05:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:05:50,735 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:05:50,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078905720] [2022-01-10 03:05:50,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078905720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:05:50,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:05:50,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-01-10 03:05:50,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461973768] [2022-01-10 03:05:50,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:05:50,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:05:50,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:05:50,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:05:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:05:50,737 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 03:05:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:05:51,287 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2022-01-10 03:05:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 03:05:51,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 34 [2022-01-10 03:05:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:05:51,290 INFO L225 Difference]: With dead ends: 176 [2022-01-10 03:05:51,290 INFO L226 Difference]: Without dead ends: 167 [2022-01-10 03:05:51,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:05:51,291 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 169 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:05:51,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 213 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:05:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-10 03:05:51,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2022-01-10 03:05:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 119 states have (on average 1.2605042016806722) internal successors, (150), 123 states have internal predecessors, (150), 20 states have call successors, (20), 14 states have call predecessors, (20), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 03:05:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 185 transitions. [2022-01-10 03:05:51,306 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 185 transitions. Word has length 34 [2022-01-10 03:05:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:05:51,307 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 185 transitions. [2022-01-10 03:05:51,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 03:05:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 185 transitions. [2022-01-10 03:05:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 03:05:51,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:05:51,308 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:05:51,321 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 03:05:51,517 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 03:05:51,518 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:05:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:05:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1153752708, now seen corresponding path program 1 times [2022-01-10 03:05:51,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:05:51,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966098298] [2022-01-10 03:05:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:05:51,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:05:51,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:05:51,520 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 03:05:51,521 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 03:05:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:05:51,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:05:51,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:05:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 03:05:51,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:05:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 03:05:52,273 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:05:52,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966098298] [2022-01-10 03:05:52,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966098298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:05:52,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:05:52,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-01-10 03:05:52,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770805614] [2022-01-10 03:05:52,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:05:52,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 03:05:52,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:05:52,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 03:05:52,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-10 03:05:52,276 INFO L87 Difference]: Start difference. First operand 153 states and 185 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:05:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:05:52,628 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2022-01-10 03:05:52,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:05:52,631 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-01-10 03:05:52,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:05:52,632 INFO L225 Difference]: With dead ends: 172 [2022-01-10 03:05:52,632 INFO L226 Difference]: Without dead ends: 147 [2022-01-10 03:05:52,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-10 03:05:52,633 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:05:52,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:05:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-10 03:05:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-01-10 03:05:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 118 states have internal predecessors, (142), 16 states have call successors, (16), 13 states have call predecessors, (16), 13 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 03:05:52,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 173 transitions. [2022-01-10 03:05:52,647 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 173 transitions. Word has length 40 [2022-01-10 03:05:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:05:52,647 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 173 transitions. [2022-01-10 03:05:52,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 03:05:52,647 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 173 transitions. [2022-01-10 03:05:52,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 03:05:52,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:05:52,649 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:05:52,658 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 03:05:52,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:05:52,858 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:05:52,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:05:52,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1670436052, now seen corresponding path program 2 times [2022-01-10 03:05:52,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:05:52,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629741841] [2022-01-10 03:05:52,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:05:52,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:05:52,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:05:52,860 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:05:52,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 03:05:53,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:05:53,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:05:53,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 03:05:53,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:06:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 3 refuted. 9 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:06:01,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:06:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:06:07,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:06:07,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629741841] [2022-01-10 03:06:07,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629741841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:06:07,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:06:07,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-10 03:06:07,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097497392] [2022-01-10 03:06:07,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:06:07,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 03:06:07,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:06:07,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 03:06:07,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=279, Unknown=7, NotChecked=0, Total=380 [2022-01-10 03:06:07,704 INFO L87 Difference]: Start difference. First operand 146 states and 173 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 03:06:26,983 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 03:06:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:06:27,817 INFO L93 Difference]: Finished difference Result 268 states and 319 transitions. [2022-01-10 03:06:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 03:06:27,820 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2022-01-10 03:06:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:06:27,822 INFO L225 Difference]: With dead ends: 268 [2022-01-10 03:06:27,822 INFO L226 Difference]: Without dead ends: 264 [2022-01-10 03:06:27,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=131, Invalid=408, Unknown=13, NotChecked=0, Total=552 [2022-01-10 03:06:27,823 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-10 03:06:27,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 381 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 1 Unknown, 32 Unchecked, 2.8s Time] [2022-01-10 03:06:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-10 03:06:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 221. [2022-01-10 03:06:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 173 states have (on average 1.1849710982658959) internal successors, (205), 177 states have internal predecessors, (205), 26 states have call successors, (26), 21 states have call predecessors, (26), 21 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-10 03:06:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 256 transitions. [2022-01-10 03:06:27,847 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 256 transitions. Word has length 40 [2022-01-10 03:06:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:06:27,847 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 256 transitions. [2022-01-10 03:06:27,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 18 states have internal predecessors, (51), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 03:06:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 256 transitions. [2022-01-10 03:06:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 03:06:27,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:06:27,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:06:27,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 03:06:28,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:06:28,059 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:06:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:06:28,059 INFO L85 PathProgramCache]: Analyzing trace with hash 886516180, now seen corresponding path program 3 times [2022-01-10 03:06:28,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:06:28,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440412023] [2022-01-10 03:06:28,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:06:28,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:06:28,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:06:28,061 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 03:06:28,061 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 03:06:28,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 03:06:28,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:06:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:06:28,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:06:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:06:28,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:06:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:06:28,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:06:28,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440412023] [2022-01-10 03:06:28,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440412023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:06:28,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:06:28,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2022-01-10 03:06:28,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710477539] [2022-01-10 03:06:28,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:06:28,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:06:28,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:06:28,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:06:28,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:06:28,588 INFO L87 Difference]: Start difference. First operand 221 states and 256 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 03:06:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:06:28,790 INFO L93 Difference]: Finished difference Result 291 states and 337 transitions. [2022-01-10 03:06:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:06:28,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 43 [2022-01-10 03:06:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:06:28,794 INFO L225 Difference]: With dead ends: 291 [2022-01-10 03:06:28,794 INFO L226 Difference]: Without dead ends: 191 [2022-01-10 03:06:28,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:06:28,795 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:06:28,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 174 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:06:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-10 03:06:28,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-01-10 03:06:28,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 150 states have (on average 1.18) internal successors, (177), 153 states have internal predecessors, (177), 22 states have call successors, (22), 18 states have call predecessors, (22), 18 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-10 03:06:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 220 transitions. [2022-01-10 03:06:28,810 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 220 transitions. Word has length 43 [2022-01-10 03:06:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:06:28,810 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 220 transitions. [2022-01-10 03:06:28,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 10 states have internal predecessors, (47), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-10 03:06:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 220 transitions. [2022-01-10 03:06:28,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 03:06:28,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:06:28,812 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:06:28,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 03:06:29,021 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 03:06:29,021 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:06:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:06:29,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2006317561, now seen corresponding path program 4 times [2022-01-10 03:06:29,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:06:29,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223247462] [2022-01-10 03:06:29,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:06:29,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:06:29,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:06:29,023 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 03:06:29,025 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 03:06:30,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:06:30,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:06:30,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 03:06:30,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:06:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:06:32,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:06:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:06:47,080 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:06:47,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223247462] [2022-01-10 03:06:47,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223247462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:06:47,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:06:47,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2022-01-10 03:06:47,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708993147] [2022-01-10 03:06:47,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:06:47,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:06:47,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:06:47,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:06:47,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=445, Unknown=1, NotChecked=0, Total=552 [2022-01-10 03:06:47,082 INFO L87 Difference]: Start difference. First operand 191 states and 220 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 03:06:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:06:54,045 INFO L93 Difference]: Finished difference Result 233 states and 267 transitions. [2022-01-10 03:06:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 03:06:54,048 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2022-01-10 03:06:54,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:06:54,050 INFO L225 Difference]: With dead ends: 233 [2022-01-10 03:06:54,050 INFO L226 Difference]: Without dead ends: 226 [2022-01-10 03:06:54,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=151, Invalid=660, Unknown=1, NotChecked=0, Total=812 [2022-01-10 03:06:54,051 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 78 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:06:54,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 319 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 87 Invalid, 0 Unknown, 56 Unchecked, 2.7s Time] [2022-01-10 03:06:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-10 03:06:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 221. [2022-01-10 03:06:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 173 states have (on average 1.1676300578034682) internal successors, (202), 177 states have internal predecessors, (202), 26 states have call successors, (26), 22 states have call predecessors, (26), 21 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-10 03:06:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 253 transitions. [2022-01-10 03:06:54,064 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 253 transitions. Word has length 46 [2022-01-10 03:06:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:06:54,065 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 253 transitions. [2022-01-10 03:06:54,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 22 states have internal predecessors, (58), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 03:06:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 253 transitions. [2022-01-10 03:06:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 03:06:54,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:06:54,066 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:06:54,076 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 03:06:54,275 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 03:06:54,275 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:06:54,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:06:54,276 INFO L85 PathProgramCache]: Analyzing trace with hash -231310199, now seen corresponding path program 1 times [2022-01-10 03:06:54,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:06:54,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949667356] [2022-01-10 03:06:54,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:06:54,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:06:54,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:06:54,277 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 03:06:54,278 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 03:06:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:06:54,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 03:06:54,426 INFO L286 TraceCheckSpWp]: Computing forward predicates...