/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/array-examples/standard_partial_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:40:16,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:40:16,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:40:16,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:40:16,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 03:40:16,721 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:40:16,721 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:40:16,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:40:16,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:40:16,722 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:40:16,722 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:40:16,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:40:16,723 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:40:16,723 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:40:16,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:40:16,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:40:16,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:40:16,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:40:16,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:40:16,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:40:16,724 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:40:16,724 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:40:16,724 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:40:16,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:40:16,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:40:16,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:40:16,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:40:16,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:40:16,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:40:16,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:40:16,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:40:16,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:40:16,726 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:40:16,726 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:40:16,726 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:40:16,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:40:16,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:40:16,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:40:16,727 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:40:16,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:40:16,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:40:16,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:40:16,930 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:40:16,931 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:40:16,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2022-01-10 03:40:16,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06c7093e5/c4e1ca9add394d53827cd0faa1092a3e/FLAGab226ac51 [2022-01-10 03:40:17,350 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:40:17,351 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2022-01-10 03:40:17,363 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06c7093e5/c4e1ca9add394d53827cd0faa1092a3e/FLAGab226ac51 [2022-01-10 03:40:17,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06c7093e5/c4e1ca9add394d53827cd0faa1092a3e [2022-01-10 03:40:17,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:40:17,746 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:40:17,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:40:17,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:40:17,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:40:17,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:40:17" (1/1) ... [2022-01-10 03:40:17,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@576b26e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17, skipping insertion in model container [2022-01-10 03:40:17,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:40:17" (1/1) ... [2022-01-10 03:40:17,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:40:17,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:40:17,900 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partial_init_ground.i[821,834] [2022-01-10 03:40:17,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:40:17,920 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:40:17,929 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partial_init_ground.i[821,834] [2022-01-10 03:40:17,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:40:17,950 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:40:17,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17 WrapperNode [2022-01-10 03:40:17,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:40:17,954 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:40:17,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:40:17,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:40:17,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17" (1/1) ... [2022-01-10 03:40:17,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17" (1/1) ... [2022-01-10 03:40:17,984 INFO L137 Inliner]: procedures = 18, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-01-10 03:40:17,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:40:17,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:40:17,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:40:17,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:40:17,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17" (1/1) ... [2022-01-10 03:40:17,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17" (1/1) ... [2022-01-10 03:40:17,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17" (1/1) ... [2022-01-10 03:40:17,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17" (1/1) ... [2022-01-10 03:40:17,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17" (1/1) ... [2022-01-10 03:40:18,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17" (1/1) ... [2022-01-10 03:40:18,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17" (1/1) ... [2022-01-10 03:40:18,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:40:18,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:40:18,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:40:18,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:40:18,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17" (1/1) ... [2022-01-10 03:40:18,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:40:18,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:40:18,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 03:40:18,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 03:40:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:40:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:40:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 03:40:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 03:40:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:40:18,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:40:18,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:40:18,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:40:18,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 03:40:18,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 03:40:18,105 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:40:18,106 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:40:18,246 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:40:18,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:40:18,251 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-10 03:40:18,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:40:18 BoogieIcfgContainer [2022-01-10 03:40:18,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:40:18,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:40:18,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:40:18,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:40:18,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:40:17" (1/3) ... [2022-01-10 03:40:18,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ab105f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:40:18, skipping insertion in model container [2022-01-10 03:40:18,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:40:17" (2/3) ... [2022-01-10 03:40:18,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ab105f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:40:18, skipping insertion in model container [2022-01-10 03:40:18,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:40:18" (3/3) ... [2022-01-10 03:40:18,279 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2022-01-10 03:40:18,288 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:40:18,288 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:40:18,340 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:40:18,345 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 03:40:18,346 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:40:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:40:18,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 03:40:18,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:40:18,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:40:18,387 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:40:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:40:18,391 INFO L85 PathProgramCache]: Analyzing trace with hash 543579029, now seen corresponding path program 1 times [2022-01-10 03:40:18,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:40:18,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311624080] [2022-01-10 03:40:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:40:18,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:40:18,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:40:18,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:40:18,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 03:40:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:40:18,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:40:18,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:40:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:40:18,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:40:18,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:40:18,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311624080] [2022-01-10 03:40:18,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311624080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:40:18,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:40:18,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:40:18,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14215431] [2022-01-10 03:40:18,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:40:18,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:40:18,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:40:18,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:40:18,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:40:18,607 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:40:18,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:40:18,636 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2022-01-10 03:40:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:40:18,638 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 03:40:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:40:18,647 INFO L225 Difference]: With dead ends: 52 [2022-01-10 03:40:18,647 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 03:40:18,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:40:18,655 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:40:18,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:40:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 03:40:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 03:40:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:40:18,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-01-10 03:40:18,701 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 11 [2022-01-10 03:40:18,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:40:18,702 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-01-10 03:40:18,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:40:18,702 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-01-10 03:40:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 03:40:18,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:40:18,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:40:18,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 03:40:18,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:40:18,913 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:40:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:40:18,914 INFO L85 PathProgramCache]: Analyzing trace with hash -629026870, now seen corresponding path program 1 times [2022-01-10 03:40:18,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:40:18,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593042746] [2022-01-10 03:40:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:40:18,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:40:18,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:40:18,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:40:18,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 03:40:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:40:18,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:40:18,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:40:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:40:19,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:40:19,006 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:40:19,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593042746] [2022-01-10 03:40:19,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593042746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:40:19,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:40:19,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:40:19,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563875029] [2022-01-10 03:40:19,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:40:19,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:40:19,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:40:19,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:40:19,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:40:19,009 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:40:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:40:19,059 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-01-10 03:40:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:40:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 03:40:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:40:19,061 INFO L225 Difference]: With dead ends: 49 [2022-01-10 03:40:19,061 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 03:40:19,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:40:19,062 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:40:19,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:40:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 03:40:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-01-10 03:40:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:40:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-01-10 03:40:19,069 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 11 [2022-01-10 03:40:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:40:19,069 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-01-10 03:40:19,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:40:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-01-10 03:40:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 03:40:19,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:40:19,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:40:19,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 03:40:19,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:40:19,280 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:40:19,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:40:19,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2037184774, now seen corresponding path program 1 times [2022-01-10 03:40:19,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:40:19,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107269388] [2022-01-10 03:40:19,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:40:19,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:40:19,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:40:19,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:40:19,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 03:40:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:40:19,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:40:19,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:40:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:40:19,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:40:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:40:19,471 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:40:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107269388] [2022-01-10 03:40:19,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107269388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:40:19,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:40:19,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:40:19,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333918723] [2022-01-10 03:40:19,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:40:19,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:40:19,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:40:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:40:19,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:40:19,478 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:40:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:40:19,600 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-01-10 03:40:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:40:19,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 03:40:19,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:40:19,602 INFO L225 Difference]: With dead ends: 62 [2022-01-10 03:40:19,602 INFO L226 Difference]: Without dead ends: 41 [2022-01-10 03:40:19,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:40:19,604 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:40:19,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 85 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:40:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-10 03:40:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-10 03:40:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:40:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-01-10 03:40:19,610 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 16 [2022-01-10 03:40:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:40:19,611 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-01-10 03:40:19,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:40:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-01-10 03:40:19,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 03:40:19,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:40:19,612 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:40:19,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 03:40:19,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:40:19,815 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:40:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:40:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1365921470, now seen corresponding path program 2 times [2022-01-10 03:40:19,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:40:19,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171913245] [2022-01-10 03:40:19,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:40:19,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:40:19,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:40:19,818 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:40:19,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 03:40:19,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:40:19,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:40:19,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:40:19,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:40:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 03:40:20,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:40:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 03:40:20,221 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:40:20,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171913245] [2022-01-10 03:40:20,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171913245] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:40:20,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:40:20,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:40:20,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194864360] [2022-01-10 03:40:20,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:40:20,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:40:20,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:40:20,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:40:20,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:40:20,223 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:40:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:40:20,696 INFO L93 Difference]: Finished difference Result 101 states and 134 transitions. [2022-01-10 03:40:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:40:20,698 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-10 03:40:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:40:20,699 INFO L225 Difference]: With dead ends: 101 [2022-01-10 03:40:20,699 INFO L226 Difference]: Without dead ends: 71 [2022-01-10 03:40:20,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:40:20,701 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 104 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:40:20,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 166 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:40:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-10 03:40:20,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-01-10 03:40:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.208955223880597) internal successors, (81), 67 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:40:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-01-10 03:40:20,725 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 31 [2022-01-10 03:40:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:40:20,725 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-01-10 03:40:20,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:40:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-01-10 03:40:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-10 03:40:20,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:40:20,727 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:40:20,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 03:40:20,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:40:20,932 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:40:20,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:40:20,932 INFO L85 PathProgramCache]: Analyzing trace with hash 68306806, now seen corresponding path program 3 times [2022-01-10 03:40:20,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:40:20,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332383136] [2022-01-10 03:40:20,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:40:20,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:40:20,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:40:20,935 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:40:20,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 03:40:21,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-10 03:40:21,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:40:21,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 03:40:21,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:40:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 03:40:21,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:40:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 03:40:22,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:40:22,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332383136] [2022-01-10 03:40:22,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332383136] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:40:22,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:40:22,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-01-10 03:40:22,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555223657] [2022-01-10 03:40:22,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:40:22,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 03:40:22,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:40:22,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 03:40:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2022-01-10 03:40:22,374 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:40:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:40:24,517 INFO L93 Difference]: Finished difference Result 179 states and 242 transitions. [2022-01-10 03:40:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 03:40:24,518 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-01-10 03:40:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:40:24,520 INFO L225 Difference]: With dead ends: 179 [2022-01-10 03:40:24,520 INFO L226 Difference]: Without dead ends: 131 [2022-01-10 03:40:24,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=454, Invalid=806, Unknown=0, NotChecked=0, Total=1260 [2022-01-10 03:40:24,522 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 524 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:40:24,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 287 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 03:40:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-10 03:40:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-01-10 03:40:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 127 states have (on average 1.204724409448819) internal successors, (153), 127 states have internal predecessors, (153), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:40:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 157 transitions. [2022-01-10 03:40:24,535 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 157 transitions. Word has length 61 [2022-01-10 03:40:24,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:40:24,535 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 157 transitions. [2022-01-10 03:40:24,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.96) internal successors, (74), 25 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:40:24,535 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 157 transitions. [2022-01-10 03:40:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-10 03:40:24,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:40:24,538 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:40:24,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 03:40:24,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:40:24,756 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:40:24,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:40:24,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1368382430, now seen corresponding path program 4 times [2022-01-10 03:40:24,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:40:24,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718614884] [2022-01-10 03:40:24,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:40:24,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:40:24,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:40:24,758 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:40:24,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 03:40:25,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:40:25,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:40:25,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 03:40:25,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:40:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-01-10 03:40:25,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:40:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-01-10 03:40:26,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:40:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718614884] [2022-01-10 03:40:26,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718614884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:40:26,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:40:26,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-10 03:40:26,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074577587] [2022-01-10 03:40:26,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:40:26,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-10 03:40:26,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:40:26,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-10 03:40:26,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 03:40:26,944 INFO L87 Difference]: Start difference. First operand 131 states and 157 transitions. Second operand has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 states have internal predecessors, (103), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:40:34,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:40:34,845 INFO L93 Difference]: Finished difference Result 335 states and 458 transitions. [2022-01-10 03:40:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-10 03:40:34,846 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 states have internal predecessors, (103), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-01-10 03:40:34,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:40:34,848 INFO L225 Difference]: With dead ends: 335 [2022-01-10 03:40:34,862 INFO L226 Difference]: Without dead ends: 251 [2022-01-10 03:40:34,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2022-01-10 03:40:34,872 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 1447 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 2851 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 2851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:40:34,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 1030 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2851 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-10 03:40:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-10 03:40:34,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-01-10 03:40:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 247 states have (on average 1.2024291497975708) internal successors, (297), 247 states have internal predecessors, (297), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 03:40:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 301 transitions. [2022-01-10 03:40:34,904 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 301 transitions. Word has length 121 [2022-01-10 03:40:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:40:34,905 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 301 transitions. [2022-01-10 03:40:34,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1458333333333335) internal successors, (103), 48 states have internal predecessors, (103), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:40:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 301 transitions. [2022-01-10 03:40:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-10 03:40:34,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:40:34,918 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:40:34,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 03:40:35,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:40:35,124 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:40:35,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:40:35,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1690281134, now seen corresponding path program 5 times [2022-01-10 03:40:35,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:40:35,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661302394] [2022-01-10 03:40:35,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:40:35,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:40:35,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:40:35,127 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:40:35,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 03:40:48,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-10 03:40:48,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:40:48,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-10 03:40:48,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:40:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-10 03:40:49,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:40:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-10 03:40:56,059 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:40:56,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661302394] [2022-01-10 03:40:56,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661302394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:40:56,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:40:56,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 97 [2022-01-10 03:40:56,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740139812] [2022-01-10 03:40:56,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:40:56,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-10 03:40:56,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:40:56,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-10 03:40:56,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2448, Invalid=6864, Unknown=0, NotChecked=0, Total=9312 [2022-01-10 03:40:56,064 INFO L87 Difference]: Start difference. First operand 251 states and 301 transitions. Second operand has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 97 states have internal predecessors, (199), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)