/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/nested_delay_notd2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:53:32,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:53:33,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:53:33,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:53:33,083 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 02:53:33,106 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:53:33,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:53:33,107 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:53:33,107 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:53:33,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:53:33,107 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:53:33,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:53:33,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:53:33,108 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:53:33,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:53:33,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:53:33,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:53:33,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:53:33,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:53:33,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:53:33,109 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:53:33,109 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:53:33,109 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:53:33,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:53:33,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:53:33,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:53:33,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:53:33,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:53:33,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:53:33,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:53:33,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:53:33,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:53:33,110 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:53:33,110 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:53:33,110 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:53:33,110 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:53:33,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:53:33,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:53:33,111 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:53:33,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:53:33,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:53:33,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:53:33,332 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:53:33,332 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:53:33,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested_delay_notd2.c [2022-01-10 02:53:33,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7543f2f48/3fd1497f55f747d6bf4fbdc0b7e7d5a2/FLAGd79898721 [2022-01-10 02:53:33,745 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:53:33,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested_delay_notd2.c [2022-01-10 02:53:33,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7543f2f48/3fd1497f55f747d6bf4fbdc0b7e7d5a2/FLAGd79898721 [2022-01-10 02:53:33,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7543f2f48/3fd1497f55f747d6bf4fbdc0b7e7d5a2 [2022-01-10 02:53:33,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:53:33,761 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:53:33,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:53:33,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:53:33,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:53:33,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:53:33" (1/1) ... [2022-01-10 02:53:33,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c6ecec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33, skipping insertion in model container [2022-01-10 02:53:33,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:53:33" (1/1) ... [2022-01-10 02:53:33,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:53:33,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:53:33,885 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/nested_delay_notd2.c[468,481] [2022-01-10 02:53:33,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:53:33,916 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:53:33,929 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/nested_delay_notd2.c[468,481] [2022-01-10 02:53:33,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:53:33,960 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:53:33,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33 WrapperNode [2022-01-10 02:53:33,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:53:33,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:53:33,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:53:33,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:53:33,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33" (1/1) ... [2022-01-10 02:53:33,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33" (1/1) ... [2022-01-10 02:53:33,997 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2022-01-10 02:53:33,997 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:53:33,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:53:33,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:53:33,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:53:34,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33" (1/1) ... [2022-01-10 02:53:34,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33" (1/1) ... [2022-01-10 02:53:34,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33" (1/1) ... [2022-01-10 02:53:34,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33" (1/1) ... [2022-01-10 02:53:34,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33" (1/1) ... [2022-01-10 02:53:34,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33" (1/1) ... [2022-01-10 02:53:34,028 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33" (1/1) ... [2022-01-10 02:53:34,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:53:34,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:53:34,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:53:34,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:53:34,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33" (1/1) ... [2022-01-10 02:53:34,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:53:34,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:53:34,055 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 02:53:34,074 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 02:53:34,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:53:34,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:53:34,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:53:34,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:53:34,133 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:53:34,134 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:53:34,226 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:53:34,230 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:53:34,230 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 02:53:34,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:53:34 BoogieIcfgContainer [2022-01-10 02:53:34,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:53:34,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:53:34,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:53:34,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:53:34,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:53:33" (1/3) ... [2022-01-10 02:53:34,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c97968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:53:34, skipping insertion in model container [2022-01-10 02:53:34,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:53:33" (2/3) ... [2022-01-10 02:53:34,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c97968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:53:34, skipping insertion in model container [2022-01-10 02:53:34,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:53:34" (3/3) ... [2022-01-10 02:53:34,237 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_notd2.c [2022-01-10 02:53:34,240 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:53:34,240 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:53:34,279 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:53:34,283 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 02:53:34,284 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:53:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 02:53:34,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:34,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:34,303 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:34,306 INFO L85 PathProgramCache]: Analyzing trace with hash -493598204, now seen corresponding path program 1 times [2022-01-10 02:53:34,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:34,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981820232] [2022-01-10 02:53:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:53:34,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:34,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:34,328 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 02:53:34,329 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 02:53:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:53:34,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 02:53:34,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:34,414 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 02:53:34,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:53:34,415 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981820232] [2022-01-10 02:53:34,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981820232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:53:34,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:53:34,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 02:53:34,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516634563] [2022-01-10 02:53:34,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:53:34,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 02:53:34,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:34,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 02:53:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 02:53:34,441 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:34,450 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2022-01-10 02:53:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 02:53:34,452 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 02:53:34,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:34,456 INFO L225 Difference]: With dead ends: 35 [2022-01-10 02:53:34,457 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 02:53:34,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 02:53:34,461 INFO L933 BasicCegarLoop]: 23 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, 23 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 02:53:34,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:53:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 02:53:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 02:53:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-01-10 02:53:34,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2022-01-10 02:53:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:53:34,483 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-01-10 02:53:34,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-01-10 02:53:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 02:53:34,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:34,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:34,493 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 02:53:34,691 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 02:53:34,691 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:34,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:34,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2059231113, now seen corresponding path program 1 times [2022-01-10 02:53:34,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:34,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302794113] [2022-01-10 02:53:34,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:53:34,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:34,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:34,695 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 02:53:34,696 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 02:53:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:53:34,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:53:34,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:34,824 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 02:53:34,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:53:34,825 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:34,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302794113] [2022-01-10 02:53:34,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302794113] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:53:34,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:53:34,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:53:34,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415105673] [2022-01-10 02:53:34,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:53:34,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:53:34,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:34,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:53:34,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:53:34,827 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:34,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:34,879 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2022-01-10 02:53:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:53:34,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 02:53:34,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:34,880 INFO L225 Difference]: With dead ends: 34 [2022-01-10 02:53:34,880 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 02:53:34,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:53:34,881 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:53:34,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:53:34,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 02:53:34,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-01-10 02:53:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-01-10 02:53:34,885 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 12 [2022-01-10 02:53:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:53:34,885 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-01-10 02:53:34,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-01-10 02:53:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 02:53:34,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:34,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:34,897 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 02:53:35,094 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 02:53:35,095 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:35,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:35,099 INFO L85 PathProgramCache]: Analyzing trace with hash 573171571, now seen corresponding path program 1 times [2022-01-10 02:53:35,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:35,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722499408] [2022-01-10 02:53:35,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:53:35,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:35,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:35,101 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 02:53:35,102 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 02:53:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:53:35,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:53:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:35,205 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 02:53:35,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:53:35,283 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 02:53:35,284 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:35,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722499408] [2022-01-10 02:53:35,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722499408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:53:35,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:53:35,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-01-10 02:53:35,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262705525] [2022-01-10 02:53:35,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:53:35,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:53:35,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:35,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:53:35,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:53:35,286 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:35,396 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-01-10 02:53:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:53:35,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-10 02:53:35,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:35,397 INFO L225 Difference]: With dead ends: 42 [2022-01-10 02:53:35,397 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 02:53:35,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:53:35,398 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:53:35,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 33 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:53:35,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 02:53:35,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-10 02:53:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-01-10 02:53:35,404 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 15 [2022-01-10 02:53:35,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:53:35,404 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-01-10 02:53:35,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-01-10 02:53:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 02:53:35,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:35,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:35,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 02:53:35,607 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 02:53:35,608 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:35,609 INFO L85 PathProgramCache]: Analyzing trace with hash -958964361, now seen corresponding path program 2 times [2022-01-10 02:53:35,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:35,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449847454] [2022-01-10 02:53:35,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:53:35,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:35,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:35,611 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 02:53:35,613 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 02:53:35,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 02:53:35,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:53:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:53:35,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 02:53:35,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:53:35,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449847454] [2022-01-10 02:53:35,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449847454] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:53:35,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:53:35,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:53:35,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222600092] [2022-01-10 02:53:35,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:53:35,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:53:35,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:35,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:53:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:53:35,818 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:35,842 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2022-01-10 02:53:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:53:35,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 02:53:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:35,844 INFO L225 Difference]: With dead ends: 73 [2022-01-10 02:53:35,844 INFO L226 Difference]: Without dead ends: 50 [2022-01-10 02:53:35,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:53:35,847 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:53:35,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:53:35,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-10 02:53:35,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-01-10 02:53:35,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:35,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2022-01-10 02:53:35,853 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 24 [2022-01-10 02:53:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:53:35,853 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2022-01-10 02:53:35,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2022-01-10 02:53:35,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 02:53:35,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:35,854 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:35,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 02:53:36,079 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 02:53:36,079 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:36,080 INFO L85 PathProgramCache]: Analyzing trace with hash -958904779, now seen corresponding path program 1 times [2022-01-10 02:53:36,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:36,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766775472] [2022-01-10 02:53:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:53:36,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:36,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:36,083 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 02:53:36,084 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 02:53:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:53:36,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:53:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:53:36,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:53:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:53:36,417 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:36,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766775472] [2022-01-10 02:53:36,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766775472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:53:36,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:53:36,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-01-10 02:53:36,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896904451] [2022-01-10 02:53:36,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:53:36,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:53:36,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:36,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:53:36,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:53:36,421 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:36,670 INFO L93 Difference]: Finished difference Result 129 states and 189 transitions. [2022-01-10 02:53:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 02:53:36,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 02:53:36,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:36,672 INFO L225 Difference]: With dead ends: 129 [2022-01-10 02:53:36,672 INFO L226 Difference]: Without dead ends: 85 [2022-01-10 02:53:36,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2022-01-10 02:53:36,673 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:53:36,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 38 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:53:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-10 02:53:36,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-01-10 02:53:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.3734939759036144) internal successors, (114), 83 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2022-01-10 02:53:36,681 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 24 [2022-01-10 02:53:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:53:36,681 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2022-01-10 02:53:36,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:36,681 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2022-01-10 02:53:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 02:53:36,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:36,682 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:36,688 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 02:53:36,888 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 02:53:36,888 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:36,889 INFO L85 PathProgramCache]: Analyzing trace with hash 859492789, now seen corresponding path program 2 times [2022-01-10 02:53:36,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:36,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493026880] [2022-01-10 02:53:36,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:53:36,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:36,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:36,893 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 02:53:36,895 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 02:53:36,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 02:53:36,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:53:36,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:53:36,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-10 02:53:36,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:53:36,978 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:36,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493026880] [2022-01-10 02:53:36,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493026880] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:53:36,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:53:36,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:53:36,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663534272] [2022-01-10 02:53:36,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:53:36,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:53:36,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:36,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:53:36,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:53:36,979 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:37,007 INFO L93 Difference]: Finished difference Result 180 states and 246 transitions. [2022-01-10 02:53:37,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:53:37,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-10 02:53:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:37,009 INFO L225 Difference]: With dead ends: 180 [2022-01-10 02:53:37,009 INFO L226 Difference]: Without dead ends: 100 [2022-01-10 02:53:37,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 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 02:53:37,010 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:53:37,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 33 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:53:37,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-10 02:53:37,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2022-01-10 02:53:37,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.3647058823529412) internal successors, (116), 85 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 116 transitions. [2022-01-10 02:53:37,020 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 116 transitions. Word has length 42 [2022-01-10 02:53:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:53:37,021 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 116 transitions. [2022-01-10 02:53:37,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 116 transitions. [2022-01-10 02:53:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 02:53:37,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:37,021 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:37,030 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 02:53:37,230 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 02:53:37,230 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:37,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:37,231 INFO L85 PathProgramCache]: Analyzing trace with hash 916751091, now seen corresponding path program 1 times [2022-01-10 02:53:37,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:37,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522869503] [2022-01-10 02:53:37,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:53:37,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:37,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:37,232 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 02:53:37,234 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 02:53:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:53:37,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 02:53:37,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:53:37,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:53:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:53:37,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:37,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522869503] [2022-01-10 02:53:37,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522869503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:53:37,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:53:37,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 02:53:37,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647477438] [2022-01-10 02:53:37,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:53:37,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 02:53:37,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:37,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 02:53:37,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-01-10 02:53:37,974 INFO L87 Difference]: Start difference. First operand 86 states and 116 transitions. Second operand has 26 states, 26 states have (on average 3.0) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:38,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:38,748 INFO L93 Difference]: Finished difference Result 229 states and 329 transitions. [2022-01-10 02:53:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 02:53:38,748 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-10 02:53:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:38,749 INFO L225 Difference]: With dead ends: 229 [2022-01-10 02:53:38,749 INFO L226 Difference]: Without dead ends: 147 [2022-01-10 02:53:38,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 02:53:38,750 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 261 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:53:38,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 68 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:53:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-10 02:53:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-01-10 02:53:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3517241379310345) internal successors, (196), 145 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 196 transitions. [2022-01-10 02:53:38,758 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 196 transitions. Word has length 42 [2022-01-10 02:53:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:53:38,759 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 196 transitions. [2022-01-10 02:53:38,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:38,759 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 196 transitions. [2022-01-10 02:53:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 02:53:38,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:38,760 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:38,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 02:53:38,966 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 02:53:38,969 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:38,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1192356723, now seen corresponding path program 2 times [2022-01-10 02:53:38,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:38,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075433024] [2022-01-10 02:53:38,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:53:38,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:38,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:38,971 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 02:53:38,972 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 02:53:39,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:53:39,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:53:39,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 02:53:39,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-01-10 02:53:39,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:53:39,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075433024] [2022-01-10 02:53:39,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075433024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:53:39,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:53:39,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 02:53:39,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907712906] [2022-01-10 02:53:39,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:53:39,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 02:53:39,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:39,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 02:53:39,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:53:39,159 INFO L87 Difference]: Start difference. First operand 146 states and 196 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:53:39,215 INFO L93 Difference]: Finished difference Result 289 states and 389 transitions. [2022-01-10 02:53:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:53:39,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-01-10 02:53:39,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:53:39,217 INFO L225 Difference]: With dead ends: 289 [2022-01-10 02:53:39,217 INFO L226 Difference]: Without dead ends: 147 [2022-01-10 02:53:39,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:53:39,218 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:53:39,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 18 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:53:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-10 02:53:39,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-01-10 02:53:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3379310344827586) internal successors, (194), 145 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 194 transitions. [2022-01-10 02:53:39,232 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 194 transitions. Word has length 72 [2022-01-10 02:53:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:53:39,232 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 194 transitions. [2022-01-10 02:53:39,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:53:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 194 transitions. [2022-01-10 02:53:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 02:53:39,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:53:39,234 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:53:39,257 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 02:53:39,457 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 02:53:39,457 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:53:39,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:53:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash 460389297, now seen corresponding path program 1 times [2022-01-10 02:53:39,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:53:39,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116059448] [2022-01-10 02:53:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:53:39,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:53:39,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:53:39,460 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 02:53:39,462 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 02:53:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:53:39,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 02:53:39,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:53:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:53:40,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:53:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:53:41,534 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:53:41,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116059448] [2022-01-10 02:53:41,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116059448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:53:41,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:53:41,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 48 [2022-01-10 02:53:41,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967250459] [2022-01-10 02:53:41,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:53:41,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-10 02:53:41,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:53:41,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-10 02:53:41,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1693, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 02:53:41,536 INFO L87 Difference]: Start difference. First operand 146 states and 194 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:00,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:00,354 INFO L93 Difference]: Finished difference Result 1949 states and 2643 transitions. [2022-01-10 02:54:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-10 02:54:00,355 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-01-10 02:54:00,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:00,360 INFO L225 Difference]: With dead ends: 1949 [2022-01-10 02:54:00,360 INFO L226 Difference]: Without dead ends: 1807 [2022-01-10 02:54:00,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2022-01-10 02:54:00,365 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 3880 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3880 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:00,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3880 Valid, 335 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2079 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 02:54:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-01-10 02:54:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1266. [2022-01-10 02:54:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.3185770750988142) internal successors, (1668), 1265 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1668 transitions. [2022-01-10 02:54:00,471 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1668 transitions. Word has length 72 [2022-01-10 02:54:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:00,472 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1668 transitions. [2022-01-10 02:54:00,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 48 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1668 transitions. [2022-01-10 02:54:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 02:54:00,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:00,480 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:00,487 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 02:54:00,687 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 02:54:00,687 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:00,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1020605171, now seen corresponding path program 1 times [2022-01-10 02:54:00,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:00,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660472329] [2022-01-10 02:54:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:00,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:00,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:00,689 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 02:54:00,693 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 02:54:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:00,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:54:00,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-01-10 02:54:00,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:54:00,854 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:00,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660472329] [2022-01-10 02:54:00,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660472329] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:54:00,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:54:00,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:54:00,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265720141] [2022-01-10 02:54:00,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:54:00,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:54:00,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:00,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:54:00,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:54:00,855 INFO L87 Difference]: Start difference. First operand 1266 states and 1668 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:00,957 INFO L93 Difference]: Finished difference Result 2552 states and 3368 transitions. [2022-01-10 02:54:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:54:00,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-01-10 02:54:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:00,962 INFO L225 Difference]: With dead ends: 2552 [2022-01-10 02:54:00,962 INFO L226 Difference]: Without dead ends: 1290 [2022-01-10 02:54:00,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 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 02:54:00,965 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:00,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 38 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-01-10 02:54:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1272. [2022-01-10 02:54:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 1.3202202989771834) internal successors, (1678), 1271 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1678 transitions. [2022-01-10 02:54:01,075 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1678 transitions. Word has length 72 [2022-01-10 02:54:01,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:01,076 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 1678 transitions. [2022-01-10 02:54:01,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1678 transitions. [2022-01-10 02:54:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 02:54:01,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:01,078 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:01,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:01,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:01,287 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1436914409, now seen corresponding path program 1 times [2022-01-10 02:54:01,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:01,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812382844] [2022-01-10 02:54:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:01,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:01,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:01,289 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:01,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 02:54:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:01,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:54:01,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-01-10 02:54:01,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:54:01,473 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:01,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812382844] [2022-01-10 02:54:01,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812382844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:54:01,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:54:01,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:54:01,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042789654] [2022-01-10 02:54:01,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:54:01,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:54:01,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:01,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:54:01,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:54:01,475 INFO L87 Difference]: Start difference. First operand 1272 states and 1678 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:01,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:01,585 INFO L93 Difference]: Finished difference Result 1925 states and 2538 transitions. [2022-01-10 02:54:01,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:54:01,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 02:54:01,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:01,589 INFO L225 Difference]: With dead ends: 1925 [2022-01-10 02:54:01,589 INFO L226 Difference]: Without dead ends: 1290 [2022-01-10 02:54:01,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 71 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 02:54:01,590 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:01,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-01-10 02:54:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1278. [2022-01-10 02:54:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 1.3187157400156617) internal successors, (1684), 1277 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:01,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1684 transitions. [2022-01-10 02:54:01,682 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1684 transitions. Word has length 73 [2022-01-10 02:54:01,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:01,683 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 1684 transitions. [2022-01-10 02:54:01,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:01,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1684 transitions. [2022-01-10 02:54:01,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 02:54:01,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:01,684 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:01,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 02:54:01,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:01,891 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:01,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1438821033, now seen corresponding path program 1 times [2022-01-10 02:54:01,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:01,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805063436] [2022-01-10 02:54:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:01,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:01,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:01,893 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:01,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 02:54:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:01,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-10 02:54:01,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:54:02,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:54:03,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:03,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805063436] [2022-01-10 02:54:03,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805063436] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:03,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:03,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2022-01-10 02:54:03,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302545726] [2022-01-10 02:54:03,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:03,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-10 02:54:03,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:03,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-10 02:54:03,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2262, Unknown=0, NotChecked=0, Total=2450 [2022-01-10 02:54:03,817 INFO L87 Difference]: Start difference. First operand 1278 states and 1684 transitions. Second operand has 50 states, 50 states have (on average 2.84) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:06,571 INFO L93 Difference]: Finished difference Result 3800 states and 4997 transitions. [2022-01-10 02:54:06,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-10 02:54:06,571 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.84) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 02:54:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:06,589 INFO L225 Difference]: With dead ends: 3800 [2022-01-10 02:54:06,589 INFO L226 Difference]: Without dead ends: 2526 [2022-01-10 02:54:06,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=407, Invalid=5143, Unknown=0, NotChecked=0, Total=5550 [2022-01-10 02:54:06,591 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 417 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 6300 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 6426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 6300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:06,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 164 Invalid, 6426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 6300 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 02:54:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2022-01-10 02:54:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 1006. [2022-01-10 02:54:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.2796019900497513) internal successors, (1286), 1005 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1286 transitions. [2022-01-10 02:54:06,685 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1286 transitions. Word has length 73 [2022-01-10 02:54:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:06,685 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1286 transitions. [2022-01-10 02:54:06,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.84) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1286 transitions. [2022-01-10 02:54:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 02:54:06,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:06,687 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:06,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 02:54:06,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:06,894 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:06,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:06,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1623737319, now seen corresponding path program 1 times [2022-01-10 02:54:06,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:06,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324511965] [2022-01-10 02:54:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:06,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:06,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:06,896 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:06,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 02:54:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:06,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:54:06,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2022-01-10 02:54:07,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:54:07,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:07,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324511965] [2022-01-10 02:54:07,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324511965] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:54:07,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:54:07,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:54:07,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507493923] [2022-01-10 02:54:07,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:54:07,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 02:54:07,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:07,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 02:54:07,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:54:07,184 INFO L87 Difference]: Start difference. First operand 1006 states and 1286 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:07,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:07,308 INFO L93 Difference]: Finished difference Result 1826 states and 2348 transitions. [2022-01-10 02:54:07,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:54:07,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 02:54:07,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:07,311 INFO L225 Difference]: With dead ends: 1826 [2022-01-10 02:54:07,311 INFO L226 Difference]: Without dead ends: 1188 [2022-01-10 02:54:07,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:54:07,313 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:07,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 51 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:54:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-01-10 02:54:07,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1188. [2022-01-10 02:54:07,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.2687447346251053) internal successors, (1506), 1187 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1506 transitions. [2022-01-10 02:54:07,420 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1506 transitions. Word has length 73 [2022-01-10 02:54:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:07,420 INFO L470 AbstractCegarLoop]: Abstraction has 1188 states and 1506 transitions. [2022-01-10 02:54:07,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1506 transitions. [2022-01-10 02:54:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-10 02:54:07,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:07,421 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:07,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:07,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:07,629 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:07,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2032536794, now seen corresponding path program 1 times [2022-01-10 02:54:07,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:07,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799061327] [2022-01-10 02:54:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:54:07,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:07,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:07,648 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:07,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 02:54:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:54:07,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 02:54:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 2 proven. 1246 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2022-01-10 02:54:08,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 2 proven. 1246 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2022-01-10 02:54:08,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:08,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799061327] [2022-01-10 02:54:08,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799061327] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:08,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:08,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-01-10 02:54:08,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689920200] [2022-01-10 02:54:08,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:08,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 02:54:08,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:08,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 02:54:08,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-10 02:54:08,548 INFO L87 Difference]: Start difference. First operand 1188 states and 1506 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:08,936 INFO L93 Difference]: Finished difference Result 4288 states and 5537 transitions. [2022-01-10 02:54:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:54:08,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-01-10 02:54:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:08,944 INFO L225 Difference]: With dead ends: 4288 [2022-01-10 02:54:08,944 INFO L226 Difference]: Without dead ends: 3650 [2022-01-10 02:54:08,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:54:08,946 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 381 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:08,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 142 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:54:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3650 states. [2022-01-10 02:54:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3650 to 3644. [2022-01-10 02:54:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 1.2863024979412572) internal successors, (4686), 3643 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 4686 transitions. [2022-01-10 02:54:09,243 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 4686 transitions. Word has length 142 [2022-01-10 02:54:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:09,243 INFO L470 AbstractCegarLoop]: Abstraction has 3644 states and 4686 transitions. [2022-01-10 02:54:09,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:09,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 4686 transitions. [2022-01-10 02:54:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-01-10 02:54:09,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:09,247 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:09,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-01-10 02:54:09,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:09,454 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash 449680486, now seen corresponding path program 2 times [2022-01-10 02:54:09,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:09,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142737555] [2022-01-10 02:54:09,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:54:09,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:09,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:09,456 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:09,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 02:54:10,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:54:10,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:10,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:54:10,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 22270 backedges. 10 proven. 18720 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2022-01-10 02:54:11,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 22270 backedges. 10 proven. 18720 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2022-01-10 02:54:12,843 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:12,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142737555] [2022-01-10 02:54:12,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142737555] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:12,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:12,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 02:54:12,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342387514] [2022-01-10 02:54:12,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:12,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 02:54:12,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:12,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 02:54:12,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-01-10 02:54:12,845 INFO L87 Difference]: Start difference. First operand 3644 states and 4686 transitions. Second operand has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 17 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:13,843 INFO L93 Difference]: Finished difference Result 10217 states and 13193 transitions. [2022-01-10 02:54:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 02:54:13,844 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 17 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 418 [2022-01-10 02:54:13,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:13,863 INFO L225 Difference]: With dead ends: 10217 [2022-01-10 02:54:13,864 INFO L226 Difference]: Without dead ends: 7670 [2022-01-10 02:54:13,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2022-01-10 02:54:13,868 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 982 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:13,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 563 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:54:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7670 states. [2022-01-10 02:54:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7670 to 7644. [2022-01-10 02:54:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7644 states, 7643 states have (on average 1.2824807012953028) internal successors, (9802), 7643 states have internal predecessors, (9802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7644 states to 7644 states and 9802 transitions. [2022-01-10 02:54:14,705 INFO L78 Accepts]: Start accepts. Automaton has 7644 states and 9802 transitions. Word has length 418 [2022-01-10 02:54:14,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:14,706 INFO L470 AbstractCegarLoop]: Abstraction has 7644 states and 9802 transitions. [2022-01-10 02:54:14,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 17 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 7644 states and 9802 transitions. [2022-01-10 02:54:14,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 971 [2022-01-10 02:54:14,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:14,722 INFO L514 BasicCegarLoop]: trace histogram [280, 280, 280, 14, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:14,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 02:54:14,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:14,934 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash 133527270, now seen corresponding path program 3 times [2022-01-10 02:54:14,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:14,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070866757] [2022-01-10 02:54:14,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:54:14,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:14,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:14,956 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:14,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 02:54:21,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 132 check-sat command(s) [2022-01-10 02:54:21,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:54:22,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 02:54:22,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:54:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 121906 backedges. 26 proven. 113620 refuted. 0 times theorem prover too weak. 8260 trivial. 0 not checked. [2022-01-10 02:54:25,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:54:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 121906 backedges. 26 proven. 113620 refuted. 0 times theorem prover too weak. 8260 trivial. 0 not checked. [2022-01-10 02:54:27,613 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:54:27,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070866757] [2022-01-10 02:54:27,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070866757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:54:27,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:54:27,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2022-01-10 02:54:27,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268051624] [2022-01-10 02:54:27,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:54:27,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-10 02:54:27,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:54:27,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-10 02:54:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=810, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 02:54:27,615 INFO L87 Difference]: Start difference. First operand 7644 states and 9802 transitions. Second operand has 34 states, 34 states have (on average 10.029411764705882) internal successors, (341), 33 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:30,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:54:30,602 INFO L93 Difference]: Finished difference Result 20789 states and 26813 transitions. [2022-01-10 02:54:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-10 02:54:30,603 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 10.029411764705882) internal successors, (341), 33 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 970 [2022-01-10 02:54:30,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:54:30,637 INFO L225 Difference]: With dead ends: 20789 [2022-01-10 02:54:30,637 INFO L226 Difference]: Without dead ends: 15698 [2022-01-10 02:54:30,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1960 GetRequests, 1906 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=983, Invalid=2097, Unknown=0, NotChecked=0, Total=3080 [2022-01-10 02:54:30,644 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 2498 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2498 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:54:30,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2498 Valid, 1556 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 02:54:30,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15698 states. [2022-01-10 02:54:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15698 to 15645. [2022-01-10 02:54:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15645 states, 15644 states have (on average 1.2807466121196625) internal successors, (20036), 15644 states have internal predecessors, (20036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:32,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15645 states to 15645 states and 20036 transitions. [2022-01-10 02:54:32,427 INFO L78 Accepts]: Start accepts. Automaton has 15645 states and 20036 transitions. Word has length 970 [2022-01-10 02:54:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:54:32,428 INFO L470 AbstractCegarLoop]: Abstraction has 15645 states and 20036 transitions. [2022-01-10 02:54:32,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 10.029411764705882) internal successors, (341), 33 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:54:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 15645 states and 20036 transitions. [2022-01-10 02:54:32,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1385 [2022-01-10 02:54:32,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:54:32,471 INFO L514 BasicCegarLoop]: trace histogram [400, 400, 400, 20, 20, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:54:32,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-01-10 02:54:32,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:54:32,695 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:54:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:54:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash 341765318, now seen corresponding path program 4 times [2022-01-10 02:54:32,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:54:32,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411336543] [2022-01-10 02:54:32,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:54:32,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:54:32,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:54:32,698 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:54:32,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 02:54:44,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:54:44,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-01-10 02:54:44,769 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.