/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/array-examples/sanfoundry_10_ground.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:34:43,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:34:43,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:34:43,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:34:43,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:34:43,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:34:43,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:34:43,135 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 03:34:43,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:34:43,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:34:43,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:34:43,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:34:43,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:34:43,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:34:43,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:34:43,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:34:43,148 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:34:43,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:34:43,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:34:43,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:34:43,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:34:43,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:34:43,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:34:43,149 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:34:43,149 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:34:43,149 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:34:43,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:34:43,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:34:43,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:34:43,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:34:43,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:34:43,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:34:43,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:34:43,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:34:43,150 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:34:43,150 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:34:43,150 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:34:43,150 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:34:43,151 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:34:43,151 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:34:43,151 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:34:43,151 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:34:43,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:34:43,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:34:43,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:34:43,386 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:34:43,396 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:34:43,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2022-01-10 03:34:43,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81cfad57c/d18a3643730f4256b7c9c3d2c7957c04/FLAG254347219 [2022-01-10 03:34:43,824 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:34:43,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2022-01-10 03:34:43,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81cfad57c/d18a3643730f4256b7c9c3d2c7957c04/FLAG254347219 [2022-01-10 03:34:43,848 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81cfad57c/d18a3643730f4256b7c9c3d2c7957c04 [2022-01-10 03:34:43,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:34:43,852 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:34:43,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:34:43,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:34:43,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:34:43,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:34:43" (1/1) ... [2022-01-10 03:34:43,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4d047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:43, skipping insertion in model container [2022-01-10 03:34:43,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:34:43" (1/1) ... [2022-01-10 03:34:43,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:34:43,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:34:44,054 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c[324,337] [2022-01-10 03:34:44,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:34:44,085 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:34:44,095 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c[324,337] [2022-01-10 03:34:44,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:34:44,126 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:34:44,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:44 WrapperNode [2022-01-10 03:34:44,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:34:44,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:34:44,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:34:44,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:34:44,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:44" (1/1) ... [2022-01-10 03:34:44,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:44" (1/1) ... [2022-01-10 03:34:44,158 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-01-10 03:34:44,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:34:44,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:34:44,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:34:44,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:34:44,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:44" (1/1) ... [2022-01-10 03:34:44,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:44" (1/1) ... [2022-01-10 03:34:44,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:44" (1/1) ... [2022-01-10 03:34:44,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:44" (1/1) ... [2022-01-10 03:34:44,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:44" (1/1) ... [2022-01-10 03:34:44,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:44" (1/1) ... [2022-01-10 03:34:44,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:44" (1/1) ... [2022-01-10 03:34:44,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:34:44,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:34:44,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:34:44,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:34:44,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:44" (1/1) ... [2022-01-10 03:34:44,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:34:44,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:34:44,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 03:34:44,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 03:34:44,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:34:44,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:34:44,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 03:34:44,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 03:34:44,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:34:44,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:34:44,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 03:34:44,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 03:34:44,303 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:34:44,304 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:34:44,473 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:34:44,477 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:34:44,477 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-10 03:34:44,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:34:44 BoogieIcfgContainer [2022-01-10 03:34:44,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:34:44,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:34:44,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:34:44,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:34:44,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:34:43" (1/3) ... [2022-01-10 03:34:44,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11297da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:34:44, skipping insertion in model container [2022-01-10 03:34:44,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:34:44" (2/3) ... [2022-01-10 03:34:44,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11297da5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:34:44, skipping insertion in model container [2022-01-10 03:34:44,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:34:44" (3/3) ... [2022-01-10 03:34:44,484 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2022-01-10 03:34:44,487 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:34:44,487 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:34:44,552 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:34:44,557 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 03:34:44,557 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:34:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 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 03:34:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 03:34:44,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:44,574 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:44,574 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:44,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2044605464, now seen corresponding path program 1 times [2022-01-10 03:34:44,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:44,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002455126] [2022-01-10 03:34:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:44,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:44,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:44,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:44,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 03:34:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:44,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:34:44,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:44,708 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 03:34:44,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:44,709 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:44,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002455126] [2022-01-10 03:34:44,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002455126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:44,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:44,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:34:44,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314634872] [2022-01-10 03:34:44,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:44,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:34:44,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:44,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:34:44,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:34:44,732 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 03:34:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:44,743 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2022-01-10 03:34:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:34:44,744 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2022-01-10 03:34:44,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:44,748 INFO L225 Difference]: With dead ends: 40 [2022-01-10 03:34:44,748 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 03:34:44,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:34:44,755 INFO L933 BasicCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:44,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:34:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 03:34:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 03:34:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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 03:34:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2022-01-10 03:34:44,776 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2022-01-10 03:34:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:44,777 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2022-01-10 03:34:44,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 03:34:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2022-01-10 03:34:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 03:34:44,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:44,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:44,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 03:34:44,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:44,979 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:44,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1935441171, now seen corresponding path program 1 times [2022-01-10 03:34:44,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:44,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739850853] [2022-01-10 03:34:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:44,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:44,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:44,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 03:34:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:45,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:34:45,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:45,081 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 03:34:45,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:45,082 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739850853] [2022-01-10 03:34:45,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739850853] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:45,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:45,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:34:45,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826085766] [2022-01-10 03:34:45,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:45,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:34:45,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:45,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:34:45,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:34:45,087 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 03:34:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:45,129 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-01-10 03:34:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:34:45,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-01-10 03:34:45,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:45,131 INFO L225 Difference]: With dead ends: 34 [2022-01-10 03:34:45,131 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 03:34:45,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:34:45,132 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:45,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:34:45,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 03:34:45,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-01-10 03:34:45,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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 03:34:45,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-01-10 03:34:45,137 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-01-10 03:34:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:45,137 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-01-10 03:34:45,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 03:34:45,138 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-01-10 03:34:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 03:34:45,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:45,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:45,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:45,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:45,345 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:45,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:45,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1280243605, now seen corresponding path program 1 times [2022-01-10 03:34:45,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:45,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013762133] [2022-01-10 03:34:45,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:45,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:45,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:45,350 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:45,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 03:34:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:45,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:34:45,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:45,435 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 03:34:45,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:45,498 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 03:34:45,498 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:45,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013762133] [2022-01-10 03:34:45,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013762133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:45,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:45,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:34:45,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181208304] [2022-01-10 03:34:45,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:45,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:34:45,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:45,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:34:45,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:34:45,500 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 03:34:45,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:45,595 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-01-10 03:34:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:34:45,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 12 [2022-01-10 03:34:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:45,597 INFO L225 Difference]: With dead ends: 39 [2022-01-10 03:34:45,597 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 03:34:45,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:34:45,598 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:45,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 58 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:34:45,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 03:34:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 03:34:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 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 03:34:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-01-10 03:34:45,601 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 12 [2022-01-10 03:34:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:45,602 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-01-10 03:34:45,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 03:34:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-01-10 03:34:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 03:34:45,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:45,602 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:45,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:45,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:45,803 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:45,804 INFO L85 PathProgramCache]: Analyzing trace with hash -244100069, now seen corresponding path program 2 times [2022-01-10 03:34:45,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:45,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998610203] [2022-01-10 03:34:45,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:34:45,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:45,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:45,805 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:45,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 03:34:45,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:34:45,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:34:45,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:34:45,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:34:45,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:45,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:45,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998610203] [2022-01-10 03:34:45,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998610203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:45,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:45,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:34:45,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389854298] [2022-01-10 03:34:45,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:45,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:34:45,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:45,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:34:45,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:34:45,882 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 03:34:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:45,956 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-01-10 03:34:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:34:45,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 18 [2022-01-10 03:34:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:45,958 INFO L225 Difference]: With dead ends: 47 [2022-01-10 03:34:45,958 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 03:34:45,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:34:45,959 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:45,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 25 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:34:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 03:34:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-01-10 03:34:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 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 03:34:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-01-10 03:34:45,963 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2022-01-10 03:34:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:45,963 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-01-10 03:34:45,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 03:34:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-01-10 03:34:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 03:34:45,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:45,964 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:45,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:46,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:46,173 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:46,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:46,173 INFO L85 PathProgramCache]: Analyzing trace with hash 581148211, now seen corresponding path program 1 times [2022-01-10 03:34:46,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:46,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975308114] [2022-01-10 03:34:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:46,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:46,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:46,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:46,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 03:34:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:46,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:34:46,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:46,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:34:46,512 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:46,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975308114] [2022-01-10 03:34:46,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975308114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:46,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:46,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:34:46,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032730886] [2022-01-10 03:34:46,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:46,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:34:46,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:46,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:34:46,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:34:46,514 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 03:34:46,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:46,855 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2022-01-10 03:34:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:34:46,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 19 [2022-01-10 03:34:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:46,873 INFO L225 Difference]: With dead ends: 59 [2022-01-10 03:34:46,873 INFO L226 Difference]: Without dead ends: 41 [2022-01-10 03:34:46,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:34:46,874 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:46,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 78 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:34:46,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-10 03:34:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-10 03:34:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 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 03:34:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-01-10 03:34:46,881 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 19 [2022-01-10 03:34:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:46,882 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-01-10 03:34:46,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 03:34:46,882 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-01-10 03:34:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 03:34:46,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:46,883 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:46,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:47,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:47,084 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:47,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:47,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1021701159, now seen corresponding path program 2 times [2022-01-10 03:34:47,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:47,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615552423] [2022-01-10 03:34:47,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:34:47,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:47,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:47,086 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:47,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 03:34:47,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:34:47,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:34:47,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:34:47,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 03:34:47,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:34:47,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:47,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615552423] [2022-01-10 03:34:47,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615552423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:34:47,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:34:47,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:34:47,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659035142] [2022-01-10 03:34:47,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:34:47,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:34:47,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:47,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:34:47,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:34:47,273 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 03:34:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:47,314 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-01-10 03:34:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:34:47,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 31 [2022-01-10 03:34:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:47,315 INFO L225 Difference]: With dead ends: 54 [2022-01-10 03:34:47,315 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 03:34:47,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 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 03:34:47,316 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:47,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 27 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:34:47,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 03:34:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-01-10 03:34:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 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 03:34:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-01-10 03:34:47,321 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2022-01-10 03:34:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:47,321 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-01-10 03:34:47,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 03:34:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-01-10 03:34:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 03:34:47,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:47,322 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:47,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 03:34:47,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:47,528 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash -777067383, now seen corresponding path program 1 times [2022-01-10 03:34:47,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:47,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937379648] [2022-01-10 03:34:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:34:47,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:47,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:47,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:47,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 03:34:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:34:47,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 03:34:47,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:47,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:48,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:48,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937379648] [2022-01-10 03:34:48,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937379648] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:48,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:48,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 03:34:48,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617288666] [2022-01-10 03:34:48,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:48,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:34:48,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:48,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:34:48,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:34:48,339 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 03:34:49,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:34:49,824 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-01-10 03:34:49,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 03:34:49,825 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 34 [2022-01-10 03:34:49,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:34:49,825 INFO L225 Difference]: With dead ends: 79 [2022-01-10 03:34:49,825 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 03:34:49,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 03:34:49,827 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:34:49,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 116 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 03:34:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 03:34:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-01-10 03:34:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 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 03:34:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-01-10 03:34:49,836 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 34 [2022-01-10 03:34:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:34:49,837 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-01-10 03:34:49,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 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 03:34:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-01-10 03:34:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 03:34:49,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:34:49,840 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:34:49,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 03:34:50,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:34:50,047 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:34:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:34:50,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2095122849, now seen corresponding path program 2 times [2022-01-10 03:34:50,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:34:50,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366558315] [2022-01-10 03:34:50,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:34:50,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:34:50,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:34:50,049 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:34:50,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 03:34:50,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:34:50,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:34:50,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 03:34:50,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:34:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:50,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:34:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:34:52,402 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:34:52,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366558315] [2022-01-10 03:34:52,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366558315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:34:52,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:34:52,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-10 03:34:52,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100555186] [2022-01-10 03:34:52,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:34:52,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-10 03:34:52,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:34:52,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-10 03:34:52,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 03:34:52,405 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 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 03:35:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:01,723 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2022-01-10 03:35:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-10 03:35:01,728 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 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 58 [2022-01-10 03:35:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:01,728 INFO L225 Difference]: With dead ends: 127 [2022-01-10 03:35:01,728 INFO L226 Difference]: Without dead ends: 111 [2022-01-10 03:35:01,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2022-01-10 03:35:01,730 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:01,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 242 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 03:35:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-10 03:35:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-01-10 03:35:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 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 03:35:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-01-10 03:35:01,741 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 58 [2022-01-10 03:35:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:01,741 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-01-10 03:35:01,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 48 states have internal predecessors, (104), 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 03:35:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-01-10 03:35:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 03:35:01,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:01,743 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:35:01,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:01,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:01,943 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:01,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:01,944 INFO L85 PathProgramCache]: Analyzing trace with hash 689306577, now seen corresponding path program 3 times [2022-01-10 03:35:01,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:01,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773577287] [2022-01-10 03:35:01,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:35:01,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:01,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:01,946 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:01,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 03:35:02,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 03:35:02,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:35:02,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 03:35:02,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-10 03:35:02,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-01-10 03:35:02,429 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:02,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773577287] [2022-01-10 03:35:02,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773577287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:02,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:02,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2022-01-10 03:35:02,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020451974] [2022-01-10 03:35:02,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:02,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 03:35:02,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 03:35:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-10 03:35:02,430 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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 03:35:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:35:02,662 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2022-01-10 03:35:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 03:35:02,663 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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 106 [2022-01-10 03:35:02,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:35:02,663 INFO L225 Difference]: With dead ends: 147 [2022-01-10 03:35:02,664 INFO L226 Difference]: Without dead ends: 130 [2022-01-10 03:35:02,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:35:02,664 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:35:02,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 50 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:35:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-10 03:35:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 120. [2022-01-10 03:35:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 119 states have internal predecessors, (124), 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 03:35:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-01-10 03:35:02,676 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 106 [2022-01-10 03:35:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:35:02,677 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-01-10 03:35:02,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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 03:35:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-01-10 03:35:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-10 03:35:02,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:35:02,682 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:35:02,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 03:35:02,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:35:02,889 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:35:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:35:02,889 INFO L85 PathProgramCache]: Analyzing trace with hash 723551483, now seen corresponding path program 1 times [2022-01-10 03:35:02,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:35:02,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137856884] [2022-01-10 03:35:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:35:02,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:35:02,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:35:02,891 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:35:02,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 03:35:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:35:03,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-10 03:35:03,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:35:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:35:04,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:35:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:35:10,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:35:10,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137856884] [2022-01-10 03:35:10,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137856884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:35:10,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:35:10,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2022-01-10 03:35:10,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430260213] [2022-01-10 03:35:10,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:35:10,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-10 03:35:10,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:35:10,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-10 03:35:10,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=6722, Unknown=0, NotChecked=0, Total=9120 [2022-01-10 03:35:10,698 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 96 states, 96 states have (on average 2.1145833333333335) internal successors, (203), 96 states have internal predecessors, (203), 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)