/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/loops-crafted-1/mono-crafted_14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:52:25,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:52:25,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:52:25,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:52:25,453 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 02:52:25,469 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:52:25,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:52:25,470 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:52:25,470 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:52:25,471 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:52:25,471 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:52:25,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:52:25,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:52:25,472 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:52:25,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:52:25,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:52:25,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:52:25,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:52:25,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:52:25,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:52:25,473 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:52:25,473 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:52:25,473 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:52:25,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:52:25,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:52:25,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:52:25,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:52:25,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:52:25,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:52:25,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:52:25,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:52:25,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:52:25,474 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:52:25,474 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:52:25,474 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:52:25,474 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:52:25,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:52:25,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:52:25,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:52:25,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:52:25,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:52:25,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:52:25,666 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:52:25,667 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:52:25,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-01-10 02:52:25,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1ac1b300/0088ed256d26456b9cacfbf4a591f0e5/FLAG0847b1a20 [2022-01-10 02:52:26,011 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:52:26,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-01-10 02:52:26,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1ac1b300/0088ed256d26456b9cacfbf4a591f0e5/FLAG0847b1a20 [2022-01-10 02:52:26,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1ac1b300/0088ed256d26456b9cacfbf4a591f0e5 [2022-01-10 02:52:26,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:52:26,472 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:52:26,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:52:26,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:52:26,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:52:26,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:52:26" (1/1) ... [2022-01-10 02:52:26,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bdb6d1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26, skipping insertion in model container [2022-01-10 02:52:26,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:52:26" (1/1) ... [2022-01-10 02:52:26,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:52:26,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:52:26,588 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c[319,332] [2022-01-10 02:52:26,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:52:26,609 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:52:26,618 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c[319,332] [2022-01-10 02:52:26,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:52:26,634 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:52:26,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26 WrapperNode [2022-01-10 02:52:26,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:52:26,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:52:26,635 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:52:26,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:52:26,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26" (1/1) ... [2022-01-10 02:52:26,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26" (1/1) ... [2022-01-10 02:52:26,665 INFO L137 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2022-01-10 02:52:26,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:52:26,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:52:26,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:52:26,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:52:26,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26" (1/1) ... [2022-01-10 02:52:26,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26" (1/1) ... [2022-01-10 02:52:26,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26" (1/1) ... [2022-01-10 02:52:26,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26" (1/1) ... [2022-01-10 02:52:26,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26" (1/1) ... [2022-01-10 02:52:26,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26" (1/1) ... [2022-01-10 02:52:26,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26" (1/1) ... [2022-01-10 02:52:26,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:52:26,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:52:26,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:52:26,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:52:26,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26" (1/1) ... [2022-01-10 02:52:26,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:52:26,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:52:26,736 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 02:52:26,761 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 02:52:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:52:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:52:26,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:52:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:52:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 02:52:26,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 02:52:26,815 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:52:26,816 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:52:26,961 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:52:26,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:52:26,965 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 02:52:26,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:52:26 BoogieIcfgContainer [2022-01-10 02:52:26,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:52:26,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:52:26,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:52:26,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:52:26,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:52:26" (1/3) ... [2022-01-10 02:52:26,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3bd06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:52:26, skipping insertion in model container [2022-01-10 02:52:26,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:52:26" (2/3) ... [2022-01-10 02:52:26,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3bd06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:52:26, skipping insertion in model container [2022-01-10 02:52:26,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:52:26" (3/3) ... [2022-01-10 02:52:26,974 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2022-01-10 02:52:26,978 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:52:26,978 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:52:27,019 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:52:27,026 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 02:52:27,026 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:52:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:52:27,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 02:52:27,047 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:27,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:27,048 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:27,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:27,053 INFO L85 PathProgramCache]: Analyzing trace with hash 537015905, now seen corresponding path program 1 times [2022-01-10 02:52:27,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:27,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254838848] [2022-01-10 02:52:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:27,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:27,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:27,063 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 02:52:27,064 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 02:52:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:27,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 02:52:27,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:27,180 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 02:52:27,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:52:27,180 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254838848] [2022-01-10 02:52:27,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254838848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:52:27,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:52:27,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 02:52:27,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273991706] [2022-01-10 02:52:27,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:52:27,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 02:52:27,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:27,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 02:52:27,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:52:27,204 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 02:52:27,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:27,215 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2022-01-10 02:52:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 02:52:27,216 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2022-01-10 02:52:27,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:27,220 INFO L225 Difference]: With dead ends: 30 [2022-01-10 02:52:27,220 INFO L226 Difference]: Without dead ends: 13 [2022-01-10 02:52:27,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 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 02:52:27,227 INFO L933 BasicCegarLoop]: 20 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, 20 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 02:52:27,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:27,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-01-10 02:52:27,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-01-10 02:52:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 02:52:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-01-10 02:52:27,254 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2022-01-10 02:52:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:27,254 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-01-10 02:52:27,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 02:52:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-01-10 02:52:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 02:52:27,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:27,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:27,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 02:52:27,467 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 02:52:27,468 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:27,468 INFO L85 PathProgramCache]: Analyzing trace with hash 250724395, now seen corresponding path program 1 times [2022-01-10 02:52:27,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:27,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569809977] [2022-01-10 02:52:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:27,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:27,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:27,470 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 02:52:27,471 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 02:52:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:27,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:52:27,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:27,521 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 02:52:27,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:52:27,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:27,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569809977] [2022-01-10 02:52:27,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569809977] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:52:27,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:52:27,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:52:27,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298118510] [2022-01-10 02:52:27,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:52:27,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:52:27,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:27,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:52:27,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:52:27,523 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 02:52:27,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:27,544 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2022-01-10 02:52:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:52:27,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2022-01-10 02:52:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:27,545 INFO L225 Difference]: With dead ends: 26 [2022-01-10 02:52:27,545 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 02:52:27,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:52:27,546 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:27,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:27,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 02:52:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 02:52:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 02:52:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-01-10 02:52:27,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2022-01-10 02:52:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:27,550 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-01-10 02:52:27,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 02:52:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-01-10 02:52:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 02:52:27,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:27,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:27,559 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 02:52:27,750 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 02:52:27,751 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:27,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:27,752 INFO L85 PathProgramCache]: Analyzing trace with hash 697472654, now seen corresponding path program 1 times [2022-01-10 02:52:27,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:27,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319172641] [2022-01-10 02:52:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:27,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:27,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:27,753 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 02:52:27,755 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 02:52:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:27,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:52:27,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:27,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:52:27,854 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:27,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319172641] [2022-01-10 02:52:27,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319172641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:27,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:27,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:52:27,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764345843] [2022-01-10 02:52:27,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:27,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:52:27,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:52:27,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:52:27,856 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 02:52:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:27,901 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2022-01-10 02:52:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:52:27,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 10 [2022-01-10 02:52:27,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:27,903 INFO L225 Difference]: With dead ends: 31 [2022-01-10 02:52:27,903 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 02:52:27,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:52:27,907 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:27,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 33 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 02:52:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-10 02:52:27,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 02:52:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-01-10 02:52:27,919 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2022-01-10 02:52:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:27,919 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-01-10 02:52:27,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 02:52:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-01-10 02:52:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 02:52:27,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:27,921 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:27,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 02:52:28,126 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 02:52:28,126 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:28,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:28,127 INFO L85 PathProgramCache]: Analyzing trace with hash -694754885, now seen corresponding path program 1 times [2022-01-10 02:52:28,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:28,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436152308] [2022-01-10 02:52:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:28,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:28,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:28,129 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 02:52:28,130 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 02:52:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:28,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:52:28,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:52:28,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:52:28,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:28,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436152308] [2022-01-10 02:52:28,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436152308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:28,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:28,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 02:52:28,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328791713] [2022-01-10 02:52:28,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:28,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:52:28,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:28,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:52:28,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:52:28,272 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 02:52:28,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:28,361 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-01-10 02:52:28,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 02:52:28,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 16 [2022-01-10 02:52:28,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:28,364 INFO L225 Difference]: With dead ends: 42 [2022-01-10 02:52:28,364 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 02:52:28,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:52:28,368 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:28,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:28,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 02:52:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 02:52:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 02:52:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-10 02:52:28,374 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2022-01-10 02:52:28,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:28,374 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-10 02:52:28,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 02:52:28,374 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-10 02:52:28,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 02:52:28,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:28,375 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:28,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 02:52:28,575 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 02:52:28,575 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:28,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:28,576 INFO L85 PathProgramCache]: Analyzing trace with hash 218030791, now seen corresponding path program 2 times [2022-01-10 02:52:28,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:28,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129760940] [2022-01-10 02:52:28,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:28,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:28,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:28,577 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 02:52:28,578 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 02:52:28,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 02:52:28,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:28,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:52:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:28,668 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-10 02:52:28,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:52:28,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:28,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129760940] [2022-01-10 02:52:28,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129760940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:52:28,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:52:28,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 02:52:28,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87562271] [2022-01-10 02:52:28,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:52:28,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 02:52:28,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:28,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 02:52:28,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:52:28,673 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) 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 02:52:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:28,700 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-01-10 02:52:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:52:28,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) 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 24 [2022-01-10 02:52:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:28,701 INFO L225 Difference]: With dead ends: 37 [2022-01-10 02:52:28,701 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 02:52:28,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:52:28,702 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:28,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:52:28,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 02:52:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-01-10 02:52:28,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:52:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-01-10 02:52:28,707 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 24 [2022-01-10 02:52:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:28,707 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-01-10 02:52:28,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) 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 02:52:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-01-10 02:52:28,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 02:52:28,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:28,723 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:28,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 02:52:28,929 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 02:52:28,929 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:28,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:28,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1794637953, now seen corresponding path program 1 times [2022-01-10 02:52:28,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:28,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717253966] [2022-01-10 02:52:28,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:52:28,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:28,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:28,931 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 02:52:28,932 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 02:52:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:52:28,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:52:28,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:52:29,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:52:29,214 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:29,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717253966] [2022-01-10 02:52:29,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717253966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:29,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:29,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:52:29,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136255291] [2022-01-10 02:52:29,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:29,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:52:29,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:29,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:52:29,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:52:29,216 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 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 02:52:29,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:29,520 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2022-01-10 02:52:29,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 02:52:29,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 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 25 [2022-01-10 02:52:29,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:29,523 INFO L225 Difference]: With dead ends: 70 [2022-01-10 02:52:29,523 INFO L226 Difference]: Without dead ends: 50 [2022-01-10 02:52:29,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2022-01-10 02:52:29,524 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:29,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-10 02:52:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-10 02:52:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:52:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-01-10 02:52:29,530 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 25 [2022-01-10 02:52:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:29,530 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-01-10 02:52:29,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 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 02:52:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-01-10 02:52:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 02:52:29,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:29,531 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:29,539 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 02:52:29,738 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 02:52:29,738 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:29,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2939801, now seen corresponding path program 2 times [2022-01-10 02:52:29,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:29,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722426110] [2022-01-10 02:52:29,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:52:29,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:29,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:29,740 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 02:52:29,741 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 02:52:29,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:52:29,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:29,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 02:52:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:52:29,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:52:30,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:30,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722426110] [2022-01-10 02:52:30,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722426110] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:30,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:30,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-01-10 02:52:30,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889769991] [2022-01-10 02:52:30,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:30,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-10 02:52:30,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-10 02:52:30,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2022-01-10 02:52:30,488 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 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 02:52:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:32,168 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2022-01-10 02:52:32,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 02:52:32,169 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 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 41 [2022-01-10 02:52:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:32,170 INFO L225 Difference]: With dead ends: 102 [2022-01-10 02:52:32,170 INFO L226 Difference]: Without dead ends: 82 [2022-01-10 02:52:32,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2022-01-10 02:52:32,172 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:32,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:52:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-10 02:52:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-01-10 02:52:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 78 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:52:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2022-01-10 02:52:32,180 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 41 [2022-01-10 02:52:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:32,180 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2022-01-10 02:52:32,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 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 02:52:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2022-01-10 02:52:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 02:52:32,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:32,182 INFO L514 BasicCegarLoop]: trace histogram [32, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:32,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 02:52:32,387 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 02:52:32,388 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:32,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:32,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1384447543, now seen corresponding path program 3 times [2022-01-10 02:52:32,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:32,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552681731] [2022-01-10 02:52:32,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:52:32,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:32,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:32,389 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 02:52:32,390 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 02:52:32,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 02:52:32,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:32,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 02:52:32,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-01-10 02:52:32,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2022-01-10 02:52:32,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:32,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552681731] [2022-01-10 02:52:32,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552681731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:32,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:32,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-01-10 02:52:32,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159059526] [2022-01-10 02:52:32,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:32,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 02:52:32,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:32,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 02:52:32,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-10 02:52:32,977 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 02:52:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:33,138 INFO L93 Difference]: Finished difference Result 138 states and 171 transitions. [2022-01-10 02:52:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:52:33,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 73 [2022-01-10 02:52:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:33,140 INFO L225 Difference]: With dead ends: 138 [2022-01-10 02:52:33,141 INFO L226 Difference]: Without dead ends: 125 [2022-01-10 02:52:33,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:52:33,141 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:33,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 89 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:52:33,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-10 02:52:33,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 112. [2022-01-10 02:52:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 108 states have internal predecessors, (128), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:52:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2022-01-10 02:52:33,152 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 73 [2022-01-10 02:52:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:33,152 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2022-01-10 02:52:33,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 02:52:33,153 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2022-01-10 02:52:33,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 02:52:33,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:33,153 INFO L514 BasicCegarLoop]: trace histogram [32, 30, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:33,163 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 02:52:33,361 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 02:52:33,362 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:33,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:33,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1233794831, now seen corresponding path program 4 times [2022-01-10 02:52:33,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:33,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818768619] [2022-01-10 02:52:33,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:52:33,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:33,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:33,364 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 02:52:33,365 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 02:52:33,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:52:33,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:33,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 02:52:33,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 02:52:33,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:52:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 02:52:35,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:52:35,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818768619] [2022-01-10 02:52:35,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818768619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:52:35,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:52:35,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2022-01-10 02:52:35,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508800282] [2022-01-10 02:52:35,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:52:35,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-10 02:52:35,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:52:35,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-10 02:52:35,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=2946, Unknown=0, NotChecked=0, Total=4032 [2022-01-10 02:52:35,813 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 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 02:52:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:52:48,057 INFO L93 Difference]: Finished difference Result 224 states and 297 transitions. [2022-01-10 02:52:48,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-10 02:52:48,058 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 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 76 [2022-01-10 02:52:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:52:48,059 INFO L225 Difference]: With dead ends: 224 [2022-01-10 02:52:48,059 INFO L226 Difference]: Without dead ends: 176 [2022-01-10 02:52:48,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=3006, Invalid=5736, Unknown=0, NotChecked=0, Total=8742 [2022-01-10 02:52:48,061 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 02:52:48,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 324 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 02:52:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-10 02:52:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-01-10 02:52:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.1294117647058823) internal successors, (192), 172 states have internal predecessors, (192), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:52:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 197 transitions. [2022-01-10 02:52:48,074 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 197 transitions. Word has length 76 [2022-01-10 02:52:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:52:48,074 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 197 transitions. [2022-01-10 02:52:48,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 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 02:52:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 197 transitions. [2022-01-10 02:52:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-10 02:52:48,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:52:48,075 INFO L514 BasicCegarLoop]: trace histogram [64, 62, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:52:48,084 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 02:52:48,282 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 02:52:48,282 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:52:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:52:48,283 INFO L85 PathProgramCache]: Analyzing trace with hash -78110865, now seen corresponding path program 5 times [2022-01-10 02:52:48,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:52:48,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543308350] [2022-01-10 02:52:48,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:52:48,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:52:48,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:52:48,284 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 02:52:48,290 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 02:52:48,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2022-01-10 02:52:48,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:52:48,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 66 conjunts are in the unsatisfiable core [2022-01-10 02:52:48,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:52:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 189 proven. 3906 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 02:52:50,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:53:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 189 proven. 3906 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 02:53:00,355 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:00,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543308350] [2022-01-10 02:53:00,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543308350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:53:00,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:53:00,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 66] total 129 [2022-01-10 02:53:00,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766847742] [2022-01-10 02:53:00,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:53:00,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-10 02:53:00,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:00,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-10 02:53:00,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4288, Invalid=12224, Unknown=0, NotChecked=0, Total=16512 [2022-01-10 02:53:00,360 INFO L87 Difference]: Start difference. First operand 176 states and 197 transitions. Second operand has 129 states, 129 states have (on average 2.0387596899224807) internal successors, (263), 129 states have internal predecessors, (263), 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)