/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/recursive-simple/id2_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:39:08,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:39:08,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:39:08,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:39:08,487 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 06:39:08,501 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:39:08,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:39:08,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:39:08,501 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:39:08,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:39:08,502 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:39:08,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:39:08,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:39:08,502 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:39:08,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:39:08,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:39:08,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:39:08,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:39:08,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:39:08,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:39:08,503 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:39:08,503 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:39:08,503 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:39:08,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:39:08,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:39:08,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:39:08,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:39:08,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:39:08,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:39:08,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:39:08,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:39:08,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:39:08,504 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:39:08,504 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:39:08,504 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:39:08,504 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:39:08,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:39:08,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:39:08,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:39:08,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:39:08,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:39:08,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:39:08,662 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:39:08,663 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:39:08,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2022-01-10 06:39:08,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/073a81001/924cdfd4c2e8497ebed5d4217e82a885/FLAG56335359d [2022-01-10 06:39:09,077 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:39:09,077 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2022-01-10 06:39:09,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/073a81001/924cdfd4c2e8497ebed5d4217e82a885/FLAG56335359d [2022-01-10 06:39:09,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/073a81001/924cdfd4c2e8497ebed5d4217e82a885 [2022-01-10 06:39:09,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:39:09,105 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:39:09,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:39:09,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:39:09,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:39:09,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:39:09" (1/1) ... [2022-01-10 06:39:09,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e57ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09, skipping insertion in model container [2022-01-10 06:39:09,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:39:09" (1/1) ... [2022-01-10 06:39:09,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:39:09,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:39:09,288 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b2_o3.c[771,784] [2022-01-10 06:39:09,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:39:09,298 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:39:09,312 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b2_o3.c[771,784] [2022-01-10 06:39:09,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:39:09,322 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:39:09,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09 WrapperNode [2022-01-10 06:39:09,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:39:09,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:39:09,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:39:09,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:39:09,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09" (1/1) ... [2022-01-10 06:39:09,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09" (1/1) ... [2022-01-10 06:39:09,353 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-01-10 06:39:09,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:39:09,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:39:09,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:39:09,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:39:09,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09" (1/1) ... [2022-01-10 06:39:09,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09" (1/1) ... [2022-01-10 06:39:09,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09" (1/1) ... [2022-01-10 06:39:09,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09" (1/1) ... [2022-01-10 06:39:09,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09" (1/1) ... [2022-01-10 06:39:09,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09" (1/1) ... [2022-01-10 06:39:09,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09" (1/1) ... [2022-01-10 06:39:09,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:39:09,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:39:09,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:39:09,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:39:09,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09" (1/1) ... [2022-01-10 06:39:09,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:39:09,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:39:09,407 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 06:39:09,414 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 06:39:09,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:39:09,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:39:09,432 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2022-01-10 06:39:09,433 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2022-01-10 06:39:09,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:39:09,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:39:09,433 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-01-10 06:39:09,433 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-01-10 06:39:09,470 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:39:09,471 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:39:09,541 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:39:09,544 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:39:09,545 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 06:39:09,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:39:09 BoogieIcfgContainer [2022-01-10 06:39:09,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:39:09,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:39:09,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:39:09,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:39:09,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:39:09" (1/3) ... [2022-01-10 06:39:09,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71209287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:39:09, skipping insertion in model container [2022-01-10 06:39:09,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:39:09" (2/3) ... [2022-01-10 06:39:09,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71209287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:39:09, skipping insertion in model container [2022-01-10 06:39:09,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:39:09" (3/3) ... [2022-01-10 06:39:09,551 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_b2_o3.c [2022-01-10 06:39:09,554 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:39:09,554 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:39:09,579 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:39:09,584 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 06:39:09,584 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:39:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 06:39:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 06:39:09,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:09,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:09,596 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:09,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:09,599 INFO L85 PathProgramCache]: Analyzing trace with hash 794002500, now seen corresponding path program 1 times [2022-01-10 06:39:09,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:09,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987732185] [2022-01-10 06:39:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:39:09,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:09,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:09,608 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 06:39:09,609 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 06:39:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:39:09,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:39:09,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:09,712 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 06:39:09,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:39:09,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:09,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987732185] [2022-01-10 06:39:09,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987732185] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:39:09,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:39:09,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:39:09,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341665463] [2022-01-10 06:39:09,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:39:09,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:39:09,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:09,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:39:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:39:09,736 INFO L87 Difference]: Start difference. First operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:39:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:09,763 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-01-10 06:39:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:39:09,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 06:39:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:09,769 INFO L225 Difference]: With dead ends: 36 [2022-01-10 06:39:09,769 INFO L226 Difference]: Without dead ends: 23 [2022-01-10 06:39:09,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:39:09,773 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:09,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 98 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:39:09,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-10 06:39:09,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-10 06:39:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 06:39:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-10 06:39:09,803 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2022-01-10 06:39:09,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:09,803 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-10 06:39:09,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 06:39:09,804 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-10 06:39:09,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 06:39:09,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:09,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:09,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:39:10,013 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 06:39:10,014 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1040166181, now seen corresponding path program 1 times [2022-01-10 06:39:10,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:10,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740967087] [2022-01-10 06:39:10,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:39:10,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:10,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:10,016 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 06:39:10,018 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 06:39:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:39:10,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:39:10,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:10,118 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 06:39:10,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:39:10,119 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:10,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740967087] [2022-01-10 06:39:10,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740967087] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:39:10,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:39:10,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:39:10,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182948675] [2022-01-10 06:39:10,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:39:10,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:39:10,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:39:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:39:10,121 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:39:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:10,140 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-10 06:39:10,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:39:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-01-10 06:39:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:10,141 INFO L225 Difference]: With dead ends: 41 [2022-01-10 06:39:10,141 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 06:39:10,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:39:10,143 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:10,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:39:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 06:39:10,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-01-10 06:39:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:39:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-10 06:39:10,149 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2022-01-10 06:39:10,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:10,150 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-10 06:39:10,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:39:10,150 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-10 06:39:10,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 06:39:10,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:10,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:10,167 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 06:39:10,358 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 06:39:10,359 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:10,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1068795332, now seen corresponding path program 1 times [2022-01-10 06:39:10,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:10,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403763553] [2022-01-10 06:39:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:39:10,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:10,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:10,361 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 06:39:10,366 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 06:39:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:39:10,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:39:10,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:10,446 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 06:39:10,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:39:10,447 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:10,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403763553] [2022-01-10 06:39:10,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403763553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:39:10,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:39:10,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:39:10,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891938922] [2022-01-10 06:39:10,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:39:10,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:39:10,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:10,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:39:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:39:10,449 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:39:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:10,479 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-01-10 06:39:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:39:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-01-10 06:39:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:10,480 INFO L225 Difference]: With dead ends: 33 [2022-01-10 06:39:10,480 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 06:39:10,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:39:10,481 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:10,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 157 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:39:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 06:39:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-01-10 06:39:10,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 06:39:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-10 06:39:10,485 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2022-01-10 06:39:10,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:10,485 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-10 06:39:10,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 06:39:10,486 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-10 06:39:10,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 06:39:10,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:10,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:10,509 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 06:39:10,693 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 06:39:10,693 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1632008158, now seen corresponding path program 1 times [2022-01-10 06:39:10,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:10,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285839468] [2022-01-10 06:39:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:39:10,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:10,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:10,697 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 06:39:10,701 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 06:39:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:39:10,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:39:10,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:39:10,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:39:10,765 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:10,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285839468] [2022-01-10 06:39:10,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285839468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:39:10,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:39:10,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:39:10,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673461979] [2022-01-10 06:39:10,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:39:10,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:39:10,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:10,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:39:10,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:39:10,767 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 06:39:10,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:10,777 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-01-10 06:39:10,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:39:10,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-01-10 06:39:10,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:10,778 INFO L225 Difference]: With dead ends: 45 [2022-01-10 06:39:10,778 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 06:39:10,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:39:10,779 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:10,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:39:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 06:39:10,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-01-10 06:39:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 06:39:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-10 06:39:10,783 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2022-01-10 06:39:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:10,784 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-10 06:39:10,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 06:39:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-10 06:39:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 06:39:10,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:10,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:10,792 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 06:39:10,990 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 06:39:10,991 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:10,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1435494653, now seen corresponding path program 1 times [2022-01-10 06:39:10,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:10,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493037552] [2022-01-10 06:39:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:39:10,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:10,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:10,995 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 06:39:10,996 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 06:39:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:39:11,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:39:11,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:39:11,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:39:11,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:11,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493037552] [2022-01-10 06:39:11,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493037552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:39:11,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:39:11,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:39:11,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391629480] [2022-01-10 06:39:11,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:39:11,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:39:11,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:11,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:39:11,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:39:11,149 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 06:39:11,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:11,189 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-01-10 06:39:11,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:39:11,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-01-10 06:39:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:11,191 INFO L225 Difference]: With dead ends: 49 [2022-01-10 06:39:11,191 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 06:39:11,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:39:11,193 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:11,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 174 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:39:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 06:39:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-01-10 06:39:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 06:39:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-10 06:39:11,198 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2022-01-10 06:39:11,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:11,198 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-10 06:39:11,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 06:39:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-10 06:39:11,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 06:39:11,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:39:11,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:39:11,209 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 06:39:11,405 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 06:39:11,405 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:39:11,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:39:11,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1464123804, now seen corresponding path program 1 times [2022-01-10 06:39:11,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:39:11,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063696672] [2022-01-10 06:39:11,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:39:11,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:39:11,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:39:11,408 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 06:39:11,408 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 06:39:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:39:11,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 06:39:11,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:39:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:39:11,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:39:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 06:39:11,857 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:39:11,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063696672] [2022-01-10 06:39:11,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063696672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:39:11,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:39:11,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-01-10 06:39:11,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907990219] [2022-01-10 06:39:11,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:39:11,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 06:39:11,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:39:11,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 06:39:11,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-01-10 06:39:11,859 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 14 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:39:11,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:39:11,982 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-01-10 06:39:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 06:39:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 14 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) Word has length 24 [2022-01-10 06:39:11,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:39:11,983 INFO L225 Difference]: With dead ends: 51 [2022-01-10 06:39:11,983 INFO L226 Difference]: Without dead ends: 0 [2022-01-10 06:39:11,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-10 06:39:11,985 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:39:11,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 250 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:39:11,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-10 06:39:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-10 06:39:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 06:39:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-10 06:39:11,986 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2022-01-10 06:39:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:39:11,986 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-10 06:39:11,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 14 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 6 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:39:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-10 06:39:11,986 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-10 06:39:11,988 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 06:39:11,997 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 06:39:12,195 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 06:39:12,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-10 06:39:12,204 INFO L858 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2022-01-10 06:39:12,204 INFO L858 garLoopResultBuilder]: For program point L18-1(line 18) no Hoare annotation was computed. [2022-01-10 06:39:12,204 INFO L858 garLoopResultBuilder]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2022-01-10 06:39:12,205 INFO L861 garLoopResultBuilder]: At program point id2ENTRY(lines 16 21) the Hoare annotation is: true [2022-01-10 06:39:12,205 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-01-10 06:39:12,205 INFO L858 garLoopResultBuilder]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2022-01-10 06:39:12,205 INFO L861 garLoopResultBuilder]: At program point L18(line 18) the Hoare annotation is: true [2022-01-10 06:39:12,205 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-01-10 06:39:12,205 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-01-10 06:39:12,205 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-01-10 06:39:12,205 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-01-10 06:39:12,205 INFO L858 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2022-01-10 06:39:12,205 INFO L858 garLoopResultBuilder]: For program point L26(lines 26 28) no Hoare annotation was computed. [2022-01-10 06:39:12,205 INFO L861 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-01-10 06:39:12,205 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-01-10 06:39:12,205 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2022-01-10 06:39:12,206 INFO L858 garLoopResultBuilder]: For program point L23(lines 23 29) no Hoare annotation was computed. [2022-01-10 06:39:12,206 INFO L858 garLoopResultBuilder]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2022-01-10 06:39:12,206 INFO L858 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-01-10 06:39:12,206 INFO L861 garLoopResultBuilder]: At program point L11(line 11) the Hoare annotation is: true [2022-01-10 06:39:12,206 INFO L858 garLoopResultBuilder]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2022-01-10 06:39:12,206 INFO L858 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-01-10 06:39:12,206 INFO L858 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2022-01-10 06:39:12,206 INFO L861 garLoopResultBuilder]: At program point idENTRY(lines 9 14) the Hoare annotation is: true [2022-01-10 06:39:12,208 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-01-10 06:39:12,209 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 06:39:12,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:39:12 BoogieIcfgContainer [2022-01-10 06:39:12,212 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 06:39:12,212 INFO L158 Benchmark]: Toolchain (without parser) took 3107.77ms. Allocated memory was 178.3MB in the beginning and 282.1MB in the end (delta: 103.8MB). Free memory was 123.4MB in the beginning and 242.9MB in the end (delta: -119.6MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 06:39:12,212 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 178.3MB. Free memory is still 139.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 06:39:12,213 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.51ms. Allocated memory is still 178.3MB. Free memory was 123.1MB in the beginning and 150.6MB in the end (delta: -27.6MB). Peak memory consumption was 10.6MB. Max. memory is 8.0GB. [2022-01-10 06:39:12,213 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.18ms. Allocated memory is still 178.3MB. Free memory was 150.6MB in the beginning and 149.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 06:39:12,213 INFO L158 Benchmark]: Boogie Preprocessor took 21.10ms. Allocated memory is still 178.3MB. Free memory was 149.1MB in the beginning and 148.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 06:39:12,213 INFO L158 Benchmark]: RCFGBuilder took 170.16ms. Allocated memory is still 178.3MB. Free memory was 148.1MB in the beginning and 138.6MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-10 06:39:12,214 INFO L158 Benchmark]: TraceAbstraction took 2665.24ms. Allocated memory was 178.3MB in the beginning and 282.1MB in the end (delta: 103.8MB). Free memory was 138.1MB in the beginning and 242.9MB in the end (delta: -104.9MB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 06:39:12,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 178.3MB. Free memory is still 139.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 217.51ms. Allocated memory is still 178.3MB. Free memory was 123.1MB in the beginning and 150.6MB in the end (delta: -27.6MB). Peak memory consumption was 10.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.18ms. Allocated memory is still 178.3MB. Free memory was 150.6MB in the beginning and 149.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.10ms. Allocated memory is still 178.3MB. Free memory was 149.1MB in the beginning and 148.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 170.16ms. Allocated memory is still 178.3MB. Free memory was 148.1MB in the beginning and 138.6MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 2665.24ms. Allocated memory was 178.3MB in the beginning and 282.1MB in the end (delta: 103.8MB). Free memory was 138.1MB in the beginning and 242.9MB in the end (delta: -104.9MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 27]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.6s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 23 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 869 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 720 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 214 IncrementalHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 149 mSDtfsCounter, 214 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=5, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 5 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 273 SizeOfPredicates, 7 NumberOfNonLiveVariables, 236 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 12/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-10 06:39:12,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...