/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:44:49,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:44:49,311 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:44:49,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:44:49,415 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 02:44:49,440 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:44:49,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:44:49,441 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:44:49,441 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:44:49,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:44:49,441 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:44:49,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:44:49,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:44:49,442 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:44:49,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:44:49,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:44:49,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:44:49,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:44:49,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:44:49,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:44:49,443 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:44:49,443 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:44:49,443 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:44:49,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:44:49,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:44:49,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:44:49,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:44:49,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:44:49,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:44:49,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:44:49,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:44:49,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:44:49,444 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:44:49,444 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:44:49,445 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:44:49,445 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:44:49,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:44:49,445 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:44:49,445 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:44:49,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:44:49,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:44:49,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:44:49,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:44:49,601 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:44:49,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2022-01-10 02:44:49,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2c9a868c/6847241c9700425da838b8689fd6bc78/FLAGa9c28f7bf [2022-01-10 02:44:49,964 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:44:49,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c [2022-01-10 02:44:49,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2c9a868c/6847241c9700425da838b8689fd6bc78/FLAGa9c28f7bf [2022-01-10 02:44:49,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2c9a868c/6847241c9700425da838b8689fd6bc78 [2022-01-10 02:44:49,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:44:49,984 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:44:49,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:44:49,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:44:49,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:44:49,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:44:49" (1/1) ... [2022-01-10 02:44:49,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52198af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:49, skipping insertion in model container [2022-01-10 02:44:49,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:44:49" (1/1) ... [2022-01-10 02:44:49,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:44:50,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:44:50,151 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c[327,340] [2022-01-10 02:44:50,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:44:50,172 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:44:50,180 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-2.c[327,340] [2022-01-10 02:44:50,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:44:50,193 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:44:50,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:50 WrapperNode [2022-01-10 02:44:50,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:44:50,195 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:44:50,195 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:44:50,195 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:44:50,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:50" (1/1) ... [2022-01-10 02:44:50,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:50" (1/1) ... [2022-01-10 02:44:50,217 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2022-01-10 02:44:50,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:44:50,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:44:50,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:44:50,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:44:50,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:50" (1/1) ... [2022-01-10 02:44:50,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:50" (1/1) ... [2022-01-10 02:44:50,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:50" (1/1) ... [2022-01-10 02:44:50,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:50" (1/1) ... [2022-01-10 02:44:50,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:50" (1/1) ... [2022-01-10 02:44:50,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:50" (1/1) ... [2022-01-10 02:44:50,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:50" (1/1) ... [2022-01-10 02:44:50,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:44:50,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:44:50,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:44:50,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:44:50,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:50" (1/1) ... [2022-01-10 02:44:50,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:44:50,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:44:50,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 02:44:50,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 02:44:50,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:44:50,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:44:50,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:44:50,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:44:50,384 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:44:50,385 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:44:50,482 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:44:50,485 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:44:50,485 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 02:44:50,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:44:50 BoogieIcfgContainer [2022-01-10 02:44:50,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:44:50,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:44:50,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:44:50,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:44:50,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:44:49" (1/3) ... [2022-01-10 02:44:50,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc79a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:44:50, skipping insertion in model container [2022-01-10 02:44:50,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:44:50" (2/3) ... [2022-01-10 02:44:50,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc79a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:44:50, skipping insertion in model container [2022-01-10 02:44:50,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:44:50" (3/3) ... [2022-01-10 02:44:50,506 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2022-01-10 02:44:50,510 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:44:50,510 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:44:50,539 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:44:50,543 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 02:44:50,543 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:44:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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 02:44:50,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 02:44:50,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:44:50,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 02:44:50,556 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:44:50,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:44:50,563 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2022-01-10 02:44:50,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:44:50,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650823879] [2022-01-10 02:44:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:44:50,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:44:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:44:50,603 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:44:50,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 02:44:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:44:50,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:44:50,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:44:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:44:50,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:44:50,767 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:44:50,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650823879] [2022-01-10 02:44:50,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650823879] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:44:50,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:44:50,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:44:50,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910845722] [2022-01-10 02:44:50,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:44:50,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:44:50,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:44:50,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:44:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:44:50,796 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:44:50,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:44:50,811 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-01-10 02:44:50,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:44:50,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-01-10 02:44:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:44:50,818 INFO L225 Difference]: With dead ends: 20 [2022-01-10 02:44:50,818 INFO L226 Difference]: Without dead ends: 8 [2022-01-10 02:44:50,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:44:50,823 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:44:50,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:44:50,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-01-10 02:44:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-01-10 02:44:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:44:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-01-10 02:44:50,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2022-01-10 02:44:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:44:50,844 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-01-10 02:44:50,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:44:50,845 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-01-10 02:44:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-10 02:44:50,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:44:50,845 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:44:50,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 02:44:51,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:44:51,051 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:44:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:44:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2022-01-10 02:44:51,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:44:51,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706611853] [2022-01-10 02:44:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:44:51,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:44:51,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:44:51,071 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:44:51,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 02:44:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:44:51,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:44:51,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:44:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:44:51,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:44:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:44:51,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:44:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706611853] [2022-01-10 02:44:51,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706611853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:44:51,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:44:51,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:44:51,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550486138] [2022-01-10 02:44:51,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:44:51,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:44:51,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:44:51,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:44:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:44:51,202 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 02:44:51,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:44:51,229 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2022-01-10 02:44:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:44:51,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 7 [2022-01-10 02:44:51,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:44:51,230 INFO L225 Difference]: With dead ends: 15 [2022-01-10 02:44:51,230 INFO L226 Difference]: Without dead ends: 11 [2022-01-10 02:44:51,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:44:51,231 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:44:51,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:44:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-01-10 02:44:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-01-10 02:44:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:44:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-01-10 02:44:51,243 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2022-01-10 02:44:51,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:44:51,245 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-01-10 02:44:51,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 02:44:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-01-10 02:44:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 02:44:51,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:44:51,249 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-01-10 02:44:51,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 02:44:51,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:44:51,455 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:44:51,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:44:51,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2022-01-10 02:44:51,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:44:51,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225003610] [2022-01-10 02:44:51,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:44:51,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:44:51,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:44:51,458 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:44:51,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 02:44:51,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:44:51,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:44:51,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:44:51,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:44:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:44:51,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:44:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:44:53,216 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:44:53,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225003610] [2022-01-10 02:44:53,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225003610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:44:53,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:44:53,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 02:44:53,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745211610] [2022-01-10 02:44:53,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:44:53,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:44:53,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:44:53,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:44:53,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:44:53,218 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:45:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:45:04,828 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-01-10 02:45:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 02:45:04,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 02:45:04,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:45:04,829 INFO L225 Difference]: With dead ends: 31 [2022-01-10 02:45:04,829 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 02:45:04,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-01-10 02:45:04,831 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 02:45:04,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 47 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-10 02:45:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 02:45:04,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 02:45:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:45:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-01-10 02:45:04,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2022-01-10 02:45:04,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:45:04,835 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-01-10 02:45:04,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:45:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-01-10 02:45:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 02:45:04,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:45:04,835 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-01-10 02:45:04,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 02:45:05,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 02:45:05,053 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:45:05,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:45:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 3 times [2022-01-10 02:45:05,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:45:05,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304930083] [2022-01-10 02:45:05,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:45:05,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:45:05,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:45:05,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 02:45:05,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 02:45:05,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-10 02:45:05,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:45:05,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 02:45:05,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:45:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:45:05,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:45:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:45:13,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:45:13,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304930083] [2022-01-10 02:45:13,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304930083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:45:13,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:45:13,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-10 02:45:13,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134287108] [2022-01-10 02:45:13,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:45:13,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 02:45:13,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:45:13,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 02:45:13,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2022-01-10 02:45:13,754 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 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 02:45:32,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 02:45:42,186 WARN L228 SmtUtils]: Spent 5.36s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)