/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/loop-invgen/heapsort.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:46:17,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:46:17,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:46:17,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:46:17,351 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 02:46:17,387 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:46:17,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:46:17,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:46:17,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:46:17,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:46:17,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:46:17,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:46:17,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:46:17,390 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:46:17,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:46:17,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:46:17,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:46:17,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:46:17,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:46:17,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:46:17,392 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:46:17,392 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:46:17,392 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:46:17,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:46:17,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:46:17,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:46:17,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:46:17,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:46:17,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:46:17,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:46:17,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:46:17,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:46:17,395 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:46:17,395 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:46:17,395 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:46:17,395 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:46:17,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:46:17,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:46:17,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:46:17,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:46:17,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:46:17,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:46:17,615 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:46:17,615 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:46:17,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/heapsort.i [2022-01-10 02:46:17,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbe07345/88519fc8167e47e5b1b1cc35e1546b57/FLAG979297bf4 [2022-01-10 02:46:18,122 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:46:18,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i [2022-01-10 02:46:18,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbe07345/88519fc8167e47e5b1b1cc35e1546b57/FLAG979297bf4 [2022-01-10 02:46:18,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbe07345/88519fc8167e47e5b1b1cc35e1546b57 [2022-01-10 02:46:18,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:46:18,153 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:46:18,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:46:18,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:46:18,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:46:18,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:46:18" (1/1) ... [2022-01-10 02:46:18,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@794ef317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18, skipping insertion in model container [2022-01-10 02:46:18,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:46:18" (1/1) ... [2022-01-10 02:46:18,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:46:18,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:46:18,378 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i[893,906] [2022-01-10 02:46:18,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:46:18,422 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:46:18,436 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/heapsort.i[893,906] [2022-01-10 02:46:18,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:46:18,462 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:46:18,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18 WrapperNode [2022-01-10 02:46:18,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:46:18,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:46:18,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:46:18,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:46:18,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18" (1/1) ... [2022-01-10 02:46:18,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18" (1/1) ... [2022-01-10 02:46:18,507 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-01-10 02:46:18,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:46:18,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:46:18,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:46:18,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:46:18,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18" (1/1) ... [2022-01-10 02:46:18,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18" (1/1) ... [2022-01-10 02:46:18,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18" (1/1) ... [2022-01-10 02:46:18,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18" (1/1) ... [2022-01-10 02:46:18,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18" (1/1) ... [2022-01-10 02:46:18,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18" (1/1) ... [2022-01-10 02:46:18,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18" (1/1) ... [2022-01-10 02:46:18,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:46:18,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:46:18,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:46:18,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:46:18,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18" (1/1) ... [2022-01-10 02:46:18,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:46:18,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:46:18,577 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 02:46:18,600 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 02:46:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:46:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:46:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:46:18,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:46:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 02:46:18,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 02:46:18,679 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:46:18,681 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:46:18,897 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:46:18,903 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:46:18,903 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 02:46:18,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:46:18 BoogieIcfgContainer [2022-01-10 02:46:18,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:46:18,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:46:18,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:46:18,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:46:18,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:46:18" (1/3) ... [2022-01-10 02:46:18,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec672d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:46:18, skipping insertion in model container [2022-01-10 02:46:18,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:46:18" (2/3) ... [2022-01-10 02:46:18,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ec672d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:46:18, skipping insertion in model container [2022-01-10 02:46:18,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:46:18" (3/3) ... [2022-01-10 02:46:18,912 INFO L111 eAbstractionObserver]: Analyzing ICFG heapsort.i [2022-01-10 02:46:18,916 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:46:18,916 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:46:18,967 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:46:18,974 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 02:46:18,974 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:46:18,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-10 02:46:18,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 02:46:18,996 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:46:18,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:46:18,998 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:46:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:46:19,008 INFO L85 PathProgramCache]: Analyzing trace with hash -839977130, now seen corresponding path program 1 times [2022-01-10 02:46:19,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:46:19,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656568261] [2022-01-10 02:46:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:46:19,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:46:19,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:46:19,025 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 02:46:19,026 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 02:46:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:46:19,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 02:46:19,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:46:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:46:19,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:46:19,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:46:19,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656568261] [2022-01-10 02:46:19,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656568261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:46:19,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:46:19,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 02:46:19,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717775184] [2022-01-10 02:46:19,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:46:19,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 02:46:19,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:46:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 02:46:19,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:46:19,158 INFO L87 Difference]: Start difference. First operand has 37 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:46:19,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:46:19,181 INFO L93 Difference]: Finished difference Result 70 states and 128 transitions. [2022-01-10 02:46:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 02:46:19,183 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 02:46:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:46:19,190 INFO L225 Difference]: With dead ends: 70 [2022-01-10 02:46:19,190 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 02:46:19,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 02:46:19,200 INFO L933 BasicCegarLoop]: 57 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, 57 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 02:46:19,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:46:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 02:46:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 02:46:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-10 02:46:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 52 transitions. [2022-01-10 02:46:19,234 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 52 transitions. Word has length 11 [2022-01-10 02:46:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:46:19,234 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 52 transitions. [2022-01-10 02:46:19,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:46:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 52 transitions. [2022-01-10 02:46:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 02:46:19,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:46:19,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:46:19,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 02:46:19,437 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 02:46:19,438 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:46:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:46:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1756109962, now seen corresponding path program 1 times [2022-01-10 02:46:19,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:46:19,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497292374] [2022-01-10 02:46:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:46:19,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:46:19,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:46:19,441 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 02:46:19,443 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 02:46:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:46:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 02:46:19,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:46:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:46:20,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:46:20,290 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:46:20,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497292374] [2022-01-10 02:46:20,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497292374] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:46:20,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:46:20,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 02:46:20,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724522934] [2022-01-10 02:46:20,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:46:20,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 02:46:20,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:46:20,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 02:46:20,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:46:20,296 INFO L87 Difference]: Start difference. First operand 33 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:46:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:46:21,830 INFO L93 Difference]: Finished difference Result 107 states and 182 transitions. [2022-01-10 02:46:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:46:21,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 02:46:21,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:46:21,836 INFO L225 Difference]: With dead ends: 107 [2022-01-10 02:46:21,836 INFO L226 Difference]: Without dead ends: 78 [2022-01-10 02:46:21,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:46:21,838 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 28 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:46:21,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 179 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 02:46:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-10 02:46:21,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 35. [2022-01-10 02:46:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-10 02:46:21,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 54 transitions. [2022-01-10 02:46:21,854 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 54 transitions. Word has length 11 [2022-01-10 02:46:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:46:21,854 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 54 transitions. [2022-01-10 02:46:21,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:46:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 54 transitions. [2022-01-10 02:46:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 02:46:21,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:46:21,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:46:21,865 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 02:46:22,063 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 02:46:22,063 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:46:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:46:22,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1728076631, now seen corresponding path program 1 times [2022-01-10 02:46:22,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:46:22,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127833263] [2022-01-10 02:46:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:46:22,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:46:22,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:46:22,066 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 02:46:22,068 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 02:46:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:46:22,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:46:22,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:46:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:46:27,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:46:27,088 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:46:27,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127833263] [2022-01-10 02:46:27,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127833263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:46:27,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:46:27,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:46:27,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909324166] [2022-01-10 02:46:27,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:46:27,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:46:27,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:46:27,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:46:27,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=29, Unknown=2, NotChecked=0, Total=42 [2022-01-10 02:46:27,091 INFO L87 Difference]: Start difference. First operand 35 states and 54 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:46:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:46:27,182 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-10 02:46:27,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:46:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 02:46:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:46:27,184 INFO L225 Difference]: With dead ends: 43 [2022-01-10 02:46:27,185 INFO L226 Difference]: Without dead ends: 41 [2022-01-10 02:46:27,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=15, Invalid=39, Unknown=2, NotChecked=0, Total=56 [2022-01-10 02:46:27,186 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 5 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:46:27,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 242 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-01-10 02:46:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-10 02:46:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-10 02:46:27,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 24 states have internal predecessors, (31), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 02:46:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 61 transitions. [2022-01-10 02:46:27,194 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 61 transitions. Word has length 11 [2022-01-10 02:46:27,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:46:27,194 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 61 transitions. [2022-01-10 02:46:27,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:46:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 61 transitions. [2022-01-10 02:46:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 02:46:27,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:46:27,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:46:27,208 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 02:46:27,406 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 02:46:27,406 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:46:27,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:46:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1716756051, now seen corresponding path program 1 times [2022-01-10 02:46:27,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:46:27,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921563664] [2022-01-10 02:46:27,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:46:27,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:46:27,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:46:27,409 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 02:46:27,410 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 02:46:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:46:27,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 02:46:27,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:46:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:46:29,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:46:29,143 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:46:29,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921563664] [2022-01-10 02:46:29,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921563664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:46:29,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:46:29,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 02:46:29,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48013344] [2022-01-10 02:46:29,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:46:29,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:46:29,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:46:29,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:46:29,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:46:29,145 INFO L87 Difference]: Start difference. First operand 41 states and 61 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:46:30,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:46:30,425 INFO L93 Difference]: Finished difference Result 70 states and 109 transitions. [2022-01-10 02:46:30,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:46:30,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 02:46:30,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:46:30,430 INFO L225 Difference]: With dead ends: 70 [2022-01-10 02:46:30,430 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 02:46:30,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:46:30,431 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 24 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:46:30,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 350 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 125 Invalid, 0 Unknown, 21 Unchecked, 1.0s Time] [2022-01-10 02:46:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 02:46:30,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-01-10 02:46:30,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 32 states have (on average 1.40625) internal successors, (45), 36 states have internal predecessors, (45), 28 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-10 02:46:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 101 transitions. [2022-01-10 02:46:30,445 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 101 transitions. Word has length 11 [2022-01-10 02:46:30,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:46:30,446 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 101 transitions. [2022-01-10 02:46:30,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:46:30,446 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 101 transitions. [2022-01-10 02:46:30,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 02:46:30,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:46:30,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:46:30,461 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 02:46:30,658 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 02:46:30,659 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:46:30,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:46:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1729510708, now seen corresponding path program 1 times [2022-01-10 02:46:30,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:46:30,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089259979] [2022-01-10 02:46:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:46:30,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:46:30,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:46:30,662 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 02:46:30,663 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 02:46:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:46:30,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:46:30,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:46:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:46:31,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:46:31,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:46:31,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089259979] [2022-01-10 02:46:31,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089259979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:46:31,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:46:31,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:46:31,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622854207] [2022-01-10 02:46:31,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:46:31,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:46:31,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:46:31,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:46:31,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:46:31,134 INFO L87 Difference]: Start difference. First operand 64 states and 101 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:46:31,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:46:31,475 INFO L93 Difference]: Finished difference Result 94 states and 149 transitions. [2022-01-10 02:46:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:46:31,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 02:46:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:46:31,482 INFO L225 Difference]: With dead ends: 94 [2022-01-10 02:46:31,482 INFO L226 Difference]: Without dead ends: 64 [2022-01-10 02:46:31,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:46:31,483 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:46:31,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 131 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:46:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-10 02:46:31,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-10 02:46:31,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 32 states have (on average 1.375) internal successors, (44), 36 states have internal predecessors, (44), 28 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-10 02:46:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 100 transitions. [2022-01-10 02:46:31,494 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 100 transitions. Word has length 11 [2022-01-10 02:46:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:46:31,494 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 100 transitions. [2022-01-10 02:46:31,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:46:31,495 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 100 transitions. [2022-01-10 02:46:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 02:46:31,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:46:31,495 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:46:31,512 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 02:46:31,696 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 02:46:31,696 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:46:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:46:31,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1071366057, now seen corresponding path program 1 times [2022-01-10 02:46:31,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:46:31,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743834046] [2022-01-10 02:46:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:46:31,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:46:31,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:46:31,699 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 02:46:31,701 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 02:46:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:46:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 02:46:31,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:46:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:46:34,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:46:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:46:35,554 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:46:35,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743834046] [2022-01-10 02:46:35,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743834046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:46:35,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:46:35,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-01-10 02:46:35,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826019625] [2022-01-10 02:46:35,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:46:35,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 02:46:35,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:46:35,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 02:46:35,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-01-10 02:46:35,556 INFO L87 Difference]: Start difference. First operand 64 states and 100 transitions. Second operand has 18 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:46:50,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:46:50,837 INFO L93 Difference]: Finished difference Result 210 states and 353 transitions. [2022-01-10 02:46:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 02:46:50,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-01-10 02:46:50,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:46:50,840 INFO L225 Difference]: With dead ends: 210 [2022-01-10 02:46:50,840 INFO L226 Difference]: Without dead ends: 208 [2022-01-10 02:46:50,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 02:46:50,842 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 148 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-01-10 02:46:50,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 263 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-01-10 02:46:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-10 02:46:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 123. [2022-01-10 02:46:50,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 64 states have internal predecessors, (80), 61 states have call successors, (61), 5 states have call predecessors, (61), 5 states have return successors, (61), 53 states have call predecessors, (61), 61 states have call successors, (61) [2022-01-10 02:46:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 202 transitions. [2022-01-10 02:46:50,873 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 202 transitions. Word has length 16 [2022-01-10 02:46:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:46:50,873 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 202 transitions. [2022-01-10 02:46:50,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:46:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 202 transitions. [2022-01-10 02:46:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 02:46:50,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:46:50,874 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:46:50,887 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 02:46:51,087 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 02:46:51,088 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:46:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:46:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash -810286114, now seen corresponding path program 1 times [2022-01-10 02:46:51,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:46:51,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805163310] [2022-01-10 02:46:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:46:51,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:46:51,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:46:51,090 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 02:46:51,091 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 02:46:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:46:51,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 02:46:51,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:46:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:46:56,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:46:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:46:58,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:46:58,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805163310] [2022-01-10 02:46:58,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805163310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:46:58,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:46:58,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-01-10 02:46:58,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112574809] [2022-01-10 02:46:58,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:46:58,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:46:58,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:46:58,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:46:58,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=196, Unknown=2, NotChecked=0, Total=240 [2022-01-10 02:46:58,157 INFO L87 Difference]: Start difference. First operand 123 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 02:46:58,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:46:58,549 INFO L93 Difference]: Finished difference Result 139 states and 226 transitions. [2022-01-10 02:46:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 02:46:58,550 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2022-01-10 02:46:58,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:46:58,552 INFO L225 Difference]: With dead ends: 139 [2022-01-10 02:46:58,552 INFO L226 Difference]: Without dead ends: 137 [2022-01-10 02:46:58,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=57, Invalid=247, Unknown=2, NotChecked=0, Total=306 [2022-01-10 02:46:58,553 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:46:58,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 312 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 165 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-01-10 02:46:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-10 02:46:58,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2022-01-10 02:46:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 60 states have (on average 1.4166666666666667) internal successors, (85), 68 states have internal predecessors, (85), 63 states have call successors, (63), 6 states have call predecessors, (63), 6 states have return successors, (63), 55 states have call predecessors, (63), 63 states have call successors, (63) [2022-01-10 02:46:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 211 transitions. [2022-01-10 02:46:58,577 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 211 transitions. Word has length 22 [2022-01-10 02:46:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:46:58,577 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 211 transitions. [2022-01-10 02:46:58,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 02:46:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 211 transitions. [2022-01-10 02:46:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 02:46:58,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:46:58,578 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:46:58,593 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 02:46:58,789 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 02:46:58,790 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:46:58,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:46:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1859508204, now seen corresponding path program 1 times [2022-01-10 02:46:58,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:46:58,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015060453] [2022-01-10 02:46:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:46:58,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:46:58,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:46:58,792 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 02:46:58,793 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 02:46:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:46:58,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 02:46:58,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:47:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:47:01,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:47:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 02:47:02,312 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:47:02,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015060453] [2022-01-10 02:47:02,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015060453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:47:02,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:47:02,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-01-10 02:47:02,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639763790] [2022-01-10 02:47:02,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:47:02,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 02:47:02,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:47:02,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 02:47:02,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-01-10 02:47:02,314 INFO L87 Difference]: Start difference. First operand 130 states and 211 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 02:47:12,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:47:12,614 INFO L93 Difference]: Finished difference Result 271 states and 451 transitions. [2022-01-10 02:47:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-10 02:47:12,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 27 [2022-01-10 02:47:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:47:12,617 INFO L225 Difference]: With dead ends: 271 [2022-01-10 02:47:12,617 INFO L226 Difference]: Without dead ends: 269 [2022-01-10 02:47:12,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:47:12,618 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 163 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:47:12,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 240 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-01-10 02:47:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-10 02:47:12,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 176. [2022-01-10 02:47:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 91 states have internal predecessors, (111), 88 states have call successors, (88), 9 states have call predecessors, (88), 9 states have return successors, (88), 75 states have call predecessors, (88), 88 states have call successors, (88) [2022-01-10 02:47:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 287 transitions. [2022-01-10 02:47:12,652 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 287 transitions. Word has length 27 [2022-01-10 02:47:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:47:12,652 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 287 transitions. [2022-01-10 02:47:12,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 02:47:12,653 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 287 transitions. [2022-01-10 02:47:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 02:47:12,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:47:12,654 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:47:12,664 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 02:47:12,861 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 02:47:12,862 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:47:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:47:12,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2047670627, now seen corresponding path program 1 times [2022-01-10 02:47:12,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:47:12,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682763258] [2022-01-10 02:47:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:47:12,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:47:12,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:47:12,864 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 02:47:12,865 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 02:47:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:47:12,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:47:12,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:47:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:47:14,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:47:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:47:16,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:47:16,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682763258] [2022-01-10 02:47:16,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682763258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:47:16,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:47:16,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-01-10 02:47:16,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90258356] [2022-01-10 02:47:16,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:47:16,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:47:16,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:47:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:47:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=143, Unknown=2, NotChecked=0, Total=182 [2022-01-10 02:47:16,401 INFO L87 Difference]: Start difference. First operand 176 states and 287 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 02:47:17,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:47:17,910 INFO L93 Difference]: Finished difference Result 197 states and 319 transitions. [2022-01-10 02:47:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:47:17,911 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) Word has length 32 [2022-01-10 02:47:17,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:47:17,913 INFO L225 Difference]: With dead ends: 197 [2022-01-10 02:47:17,913 INFO L226 Difference]: Without dead ends: 195 [2022-01-10 02:47:17,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=52, Invalid=186, Unknown=2, NotChecked=0, Total=240 [2022-01-10 02:47:17,915 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:47:17,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 298 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-01-10 02:47:17,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-10 02:47:17,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2022-01-10 02:47:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 86 states have (on average 1.4186046511627908) internal successors, (122), 102 states have internal predecessors, (122), 96 states have call successors, (96), 11 states have call predecessors, (96), 10 states have return successors, (96), 79 states have call predecessors, (96), 96 states have call successors, (96) [2022-01-10 02:47:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 314 transitions. [2022-01-10 02:47:17,954 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 314 transitions. Word has length 32 [2022-01-10 02:47:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:47:17,955 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 314 transitions. [2022-01-10 02:47:17,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 02:47:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 314 transitions. [2022-01-10 02:47:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 02:47:17,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:47:17,957 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:47:17,965 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 02:47:18,163 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 02:47:18,164 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:47:18,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:47:18,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1787099308, now seen corresponding path program 1 times [2022-01-10 02:47:18,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:47:18,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726555627] [2022-01-10 02:47:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:47:18,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:47:18,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:47:18,166 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 02:47:18,167 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 02:47:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:47:18,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 02:47:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:47:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 02:47:20,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:47:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 02:47:20,731 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:47:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726555627] [2022-01-10 02:47:20,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726555627] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 02:47:20,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:47:20,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2022-01-10 02:47:20,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906222614] [2022-01-10 02:47:20,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:47:20,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 02:47:20,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:47:20,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 02:47:20,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:47:20,733 INFO L87 Difference]: Start difference. First operand 193 states and 314 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 02:47:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:47:20,881 INFO L93 Difference]: Finished difference Result 272 states and 450 transitions. [2022-01-10 02:47:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:47:20,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-01-10 02:47:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:47:20,884 INFO L225 Difference]: With dead ends: 272 [2022-01-10 02:47:20,884 INFO L226 Difference]: Without dead ends: 270 [2022-01-10 02:47:20,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-10 02:47:20,885 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 16 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:47:20,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 196 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:47:20,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-10 02:47:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 193. [2022-01-10 02:47:20,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 87 states have (on average 1.3908045977011494) internal successors, (121), 101 states have internal predecessors, (121), 94 states have call successors, (94), 12 states have call predecessors, (94), 11 states have return successors, (94), 79 states have call predecessors, (94), 94 states have call successors, (94) [2022-01-10 02:47:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 309 transitions. [2022-01-10 02:47:20,919 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 309 transitions. Word has length 37 [2022-01-10 02:47:20,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:47:20,919 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 309 transitions. [2022-01-10 02:47:20,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 02:47:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 309 transitions. [2022-01-10 02:47:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 02:47:20,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:47:20,924 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:47:20,933 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 02:47:21,132 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 02:47:21,133 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:47:21,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:47:21,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1791836077, now seen corresponding path program 1 times [2022-01-10 02:47:21,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:47:21,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814130702] [2022-01-10 02:47:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:47:21,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:47:21,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:47:21,136 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 02:47:21,138 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 02:47:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:47:21,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 02:47:21,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:47:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 02:47:23,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:47:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 02:47:25,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:47:25,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814130702] [2022-01-10 02:47:25,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814130702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:47:25,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:47:25,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2022-01-10 02:47:25,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566144023] [2022-01-10 02:47:25,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:47:25,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 02:47:25,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:47:25,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 02:47:25,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-01-10 02:47:25,210 INFO L87 Difference]: Start difference. First operand 193 states and 309 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 7 states have call successors, (8)