/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/nla-digbench-scaling/lcm1_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:23:49,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:23:49,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:23:49,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:23:49,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:23:49,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:23:49,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:23:49,176 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 03:23:49,200 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:23:49,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:23:49,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:23:49,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:23:49,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:23:49,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:23:49,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:23:49,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:23:49,202 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:23:49,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:23:49,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:23:49,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:23:49,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:23:49,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:23:49,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:23:49,203 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:23:49,203 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:23:49,203 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:23:49,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:23:49,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:23:49,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:23:49,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:23:49,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:23:49,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:23:49,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:23:49,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:23:49,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:23:49,205 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:23:49,205 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:23:49,205 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:23:49,205 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:23:49,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:23:49,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:23:49,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:23:49,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:23:49,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:23:49,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:23:49,421 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:23:49,422 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:23:49,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound5.c [2022-01-10 03:23:49,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0156f1986/d2d7d86b9eea4accaf85fb343fc1cf54/FLAG8604151a1 [2022-01-10 03:23:49,769 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:23:49,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound5.c [2022-01-10 03:23:49,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0156f1986/d2d7d86b9eea4accaf85fb343fc1cf54/FLAG8604151a1 [2022-01-10 03:23:50,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0156f1986/d2d7d86b9eea4accaf85fb343fc1cf54 [2022-01-10 03:23:50,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:23:50,199 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:23:50,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:23:50,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:23:50,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:23:50,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:23:50" (1/1) ... [2022-01-10 03:23:50,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d210880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50, skipping insertion in model container [2022-01-10 03:23:50,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:23:50" (1/1) ... [2022-01-10 03:23:50,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:23:50,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:23:50,322 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound5.c[552,565] [2022-01-10 03:23:50,338 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:23:50,344 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:23:50,352 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm1_valuebound5.c[552,565] [2022-01-10 03:23:50,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:23:50,364 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:23:50,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50 WrapperNode [2022-01-10 03:23:50,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:23:50,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:23:50,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:23:50,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:23:50,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50" (1/1) ... [2022-01-10 03:23:50,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50" (1/1) ... [2022-01-10 03:23:50,385 INFO L137 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 66 [2022-01-10 03:23:50,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:23:50,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:23:50,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:23:50,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:23:50,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50" (1/1) ... [2022-01-10 03:23:50,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50" (1/1) ... [2022-01-10 03:23:50,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50" (1/1) ... [2022-01-10 03:23:50,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50" (1/1) ... [2022-01-10 03:23:50,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50" (1/1) ... [2022-01-10 03:23:50,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50" (1/1) ... [2022-01-10 03:23:50,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50" (1/1) ... [2022-01-10 03:23:50,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:23:50,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:23:50,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:23:50,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:23:50,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50" (1/1) ... [2022-01-10 03:23:50,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:23:50,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:23:50,425 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 03:23:50,430 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 03:23:50,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:23:50,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:23:50,449 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:23:50,449 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:23:50,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:23:50,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:23:50,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:23:50,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:23:50,500 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:23:50,501 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:23:50,689 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:23:50,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:23:50,697 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 03:23:50,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:23:50 BoogieIcfgContainer [2022-01-10 03:23:50,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:23:50,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:23:50,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:23:50,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:23:50,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:23:50" (1/3) ... [2022-01-10 03:23:50,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ab9bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:23:50, skipping insertion in model container [2022-01-10 03:23:50,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:23:50" (2/3) ... [2022-01-10 03:23:50,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ab9bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:23:50, skipping insertion in model container [2022-01-10 03:23:50,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:23:50" (3/3) ... [2022-01-10 03:23:50,706 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_valuebound5.c [2022-01-10 03:23:50,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:23:50,710 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:23:50,751 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:23:50,757 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 03:23:50,757 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:23:50,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-10 03:23:50,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 03:23:50,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:50,784 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:23:50,784 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:50,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1807347491, now seen corresponding path program 1 times [2022-01-10 03:23:50,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:50,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461435497] [2022-01-10 03:23:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:50,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:50,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:50,801 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 03:23:50,802 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 03:23:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:50,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:23:50,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 03:23:51,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:23:51,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:51,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461435497] [2022-01-10 03:23:51,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461435497] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:23:51,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:23:51,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:23:51,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014021432] [2022-01-10 03:23:51,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:23:51,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:23:51,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:51,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:23:51,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:23:51,029 INFO L87 Difference]: Start difference. First operand has 35 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:23:51,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:23:51,056 INFO L93 Difference]: Finished difference Result 67 states and 115 transitions. [2022-01-10 03:23:51,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:23:51,058 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-01-10 03:23:51,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:23:51,063 INFO L225 Difference]: With dead ends: 67 [2022-01-10 03:23:51,063 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 03:23:51,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 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 03:23:51,067 INFO L933 BasicCegarLoop]: 46 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, 46 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 03:23:51,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:23:51,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 03:23:51,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-10 03:23:51,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 03:23:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-01-10 03:23:51,120 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-01-10 03:23:51,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:23:51,121 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-01-10 03:23:51,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:23:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-01-10 03:23:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 03:23:51,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:51,123 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:23:51,135 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 03:23:51,332 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 03:23:51,333 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:51,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:51,334 INFO L85 PathProgramCache]: Analyzing trace with hash 197197551, now seen corresponding path program 1 times [2022-01-10 03:23:51,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:51,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972833542] [2022-01-10 03:23:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:51,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:51,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:51,338 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 03:23:51,340 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 03:23:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:51,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 03:23:51,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 03:23:51,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:23:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-10 03:23:52,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:23:52,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972833542] [2022-01-10 03:23:52,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972833542] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:23:52,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:23:52,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-01-10 03:23:52,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171334476] [2022-01-10 03:23:52,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:23:52,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:23:52,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:23:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:23:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:23:52,697 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:23:55,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:23:57,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:23:57,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:23:57,973 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-01-10 03:23:57,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:23:57,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-01-10 03:23:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:23:57,979 INFO L225 Difference]: With dead ends: 48 [2022-01-10 03:23:57,979 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 03:23:57,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:23:57,980 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:23:57,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 130 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2022-01-10 03:23:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 03:23:57,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-01-10 03:23:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-10 03:23:57,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2022-01-10 03:23:57,989 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 39 [2022-01-10 03:23:57,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:23:57,989 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2022-01-10 03:23:57,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:23:57,989 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2022-01-10 03:23:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 03:23:57,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:23:57,990 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:23:57,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 03:23:58,191 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 03:23:58,191 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:23:58,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:23:58,192 INFO L85 PathProgramCache]: Analyzing trace with hash -857401627, now seen corresponding path program 1 times [2022-01-10 03:23:58,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:23:58,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289688383] [2022-01-10 03:23:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:23:58,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:23:58,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:23:58,193 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 03:23:58,195 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 03:23:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:23:58,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 03:23:58,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:23:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 03:23:58,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:24:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-10 03:24:00,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:24:00,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289688383] [2022-01-10 03:24:00,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289688383] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:24:00,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:24:00,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-01-10 03:24:00,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681318930] [2022-01-10 03:24:00,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:24:00,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:24:00,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:24:00,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:24:00,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:24:00,355 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 03:24:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:24:01,277 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2022-01-10 03:24:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:24:01,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-01-10 03:24:01,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:24:01,283 INFO L225 Difference]: With dead ends: 61 [2022-01-10 03:24:01,283 INFO L226 Difference]: Without dead ends: 59 [2022-01-10 03:24:01,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-10 03:24:01,285 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 03:24:01,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 145 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 03:24:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-10 03:24:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-01-10 03:24:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-10 03:24:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2022-01-10 03:24:01,293 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 45 [2022-01-10 03:24:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:24:01,293 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2022-01-10 03:24:01,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 03:24:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2022-01-10 03:24:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 03:24:01,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:24:01,295 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:24:01,303 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 03:24:01,501 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 03:24:01,501 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:24:01,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:24:01,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1563788950, now seen corresponding path program 1 times [2022-01-10 03:24:01,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:24:01,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686988908] [2022-01-10 03:24:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:24:01,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:24:01,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:24:01,506 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 03:24:01,507 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 03:24:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:24:01,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:24:01,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:24:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-10 03:24:01,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:24:01,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:24:01,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686988908] [2022-01-10 03:24:01,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686988908] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:24:01,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:24:01,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 03:24:01,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108448851] [2022-01-10 03:24:01,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:24:01,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:24:01,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:24:01,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:24:01,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:24:01,633 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 03:24:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:24:01,798 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2022-01-10 03:24:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:24:01,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-01-10 03:24:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:24:01,800 INFO L225 Difference]: With dead ends: 64 [2022-01-10 03:24:01,800 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 03:24:01,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:24:01,801 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:24:01,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 152 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:24:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 03:24:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-10 03:24:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.25) internal successors, (40), 33 states have internal predecessors, (40), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 03:24:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2022-01-10 03:24:01,808 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 50 [2022-01-10 03:24:01,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:24:01,809 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2022-01-10 03:24:01,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 03:24:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2022-01-10 03:24:01,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 03:24:01,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:24:01,810 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:24:01,819 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 03:24:02,017 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 03:24:02,018 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:24:02,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:24:02,018 INFO L85 PathProgramCache]: Analyzing trace with hash 696987010, now seen corresponding path program 1 times [2022-01-10 03:24:02,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:24:02,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233600329] [2022-01-10 03:24:02,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:24:02,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:24:02,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:24:02,020 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 03:24:02,022 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 03:24:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:24:02,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 03:24:02,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:24:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 03:24:02,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:24:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-10 03:24:05,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:24:05,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233600329] [2022-01-10 03:24:05,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233600329] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:24:05,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:24:05,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2022-01-10 03:24:05,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560954044] [2022-01-10 03:24:05,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:24:05,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:24:05,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:24:05,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:24:05,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-10 03:24:05,975 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 03:24:08,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:10,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:13,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:13,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:24:13,914 INFO L93 Difference]: Finished difference Result 86 states and 121 transitions. [2022-01-10 03:24:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:24:13,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 53 [2022-01-10 03:24:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:24:13,920 INFO L225 Difference]: With dead ends: 86 [2022-01-10 03:24:13,920 INFO L226 Difference]: Without dead ends: 84 [2022-01-10 03:24:13,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-01-10 03:24:13,921 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-01-10 03:24:13,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 168 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 3 Unknown, 0 Unchecked, 7.8s Time] [2022-01-10 03:24:13,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-10 03:24:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-10 03:24:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 54 states have internal predecessors, (69), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-10 03:24:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2022-01-10 03:24:13,934 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 53 [2022-01-10 03:24:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:24:13,934 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2022-01-10 03:24:13,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 03:24:13,935 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2022-01-10 03:24:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 03:24:13,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:24:13,936 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:24:13,943 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 03:24:14,143 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 03:24:14,143 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:24:14,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:24:14,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1899280472, now seen corresponding path program 1 times [2022-01-10 03:24:14,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:24:14,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440416709] [2022-01-10 03:24:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:24:14,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:24:14,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:24:14,146 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 03:24:14,147 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 03:24:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:24:14,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 03:24:14,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:24:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-01-10 03:24:14,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:24:18,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:24:18,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440416709] [2022-01-10 03:24:18,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440416709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:24:18,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2088758073] [2022-01-10 03:24:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:24:18,270 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:24:18,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:24:18,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:24:18,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-01-10 03:24:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:24:18,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:24:18,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:24:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-01-10 03:24:18,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:24:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 03:24:23,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2088758073] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:24:23,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:24:23,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14, 6] total 19 [2022-01-10 03:24:23,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034500660] [2022-01-10 03:24:23,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:24:23,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:24:23,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:24:23,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:24:23,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=330, Unknown=1, NotChecked=0, Total=420 [2022-01-10 03:24:23,068 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 03:24:25,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:24:26,378 INFO L93 Difference]: Finished difference Result 108 states and 153 transitions. [2022-01-10 03:24:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:24:26,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2022-01-10 03:24:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:24:26,386 INFO L225 Difference]: With dead ends: 108 [2022-01-10 03:24:26,386 INFO L226 Difference]: Without dead ends: 106 [2022-01-10 03:24:26,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=93, Invalid=368, Unknown=1, NotChecked=0, Total=462 [2022-01-10 03:24:26,387 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:24:26,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 120 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-01-10 03:24:26,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-10 03:24:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-01-10 03:24:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 69 states have internal predecessors, (89), 31 states have call successors, (31), 5 states have call predecessors, (31), 5 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-01-10 03:24:26,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 150 transitions. [2022-01-10 03:24:26,399 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 150 transitions. Word has length 60 [2022-01-10 03:24:26,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:24:26,399 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 150 transitions. [2022-01-10 03:24:26,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 03:24:26,399 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 150 transitions. [2022-01-10 03:24:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 03:24:26,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:24:26,400 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:24:26,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-01-10 03:24:26,610 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 03:24:26,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:24:26,807 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:24:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:24:26,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2023913681, now seen corresponding path program 1 times [2022-01-10 03:24:26,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:24:26,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146720638] [2022-01-10 03:24:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:24:26,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:24:26,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:24:26,809 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:24:26,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 03:24:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:24:26,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 03:24:26,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:24:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 03:24:29,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:24:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 03:24:35,267 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:24:35,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146720638] [2022-01-10 03:24:35,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146720638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:24:35,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:24:35,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 21 [2022-01-10 03:24:35,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639518059] [2022-01-10 03:24:35,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:24:35,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 03:24:35,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:24:35,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 03:24:35,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:24:35,269 INFO L87 Difference]: Start difference. First operand 105 states and 150 transitions. Second operand has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 12 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-01-10 03:24:41,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:43,548 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:45,557 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:24:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:24:49,391 INFO L93 Difference]: Finished difference Result 216 states and 311 transitions. [2022-01-10 03:24:49,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 03:24:49,394 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 12 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 67 [2022-01-10 03:24:49,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:24:49,396 INFO L225 Difference]: With dead ends: 216 [2022-01-10 03:24:49,396 INFO L226 Difference]: Without dead ends: 160 [2022-01-10 03:24:49,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-01-10 03:24:49,397 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 84 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 85 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-01-10 03:24:49,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 353 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 511 Invalid, 3 Unknown, 0 Unchecked, 12.8s Time] [2022-01-10 03:24:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-10 03:24:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 153. [2022-01-10 03:24:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 100 states have (on average 1.3) internal successors, (130), 103 states have internal predecessors, (130), 45 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2022-01-10 03:24:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 219 transitions. [2022-01-10 03:24:49,435 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 219 transitions. Word has length 67 [2022-01-10 03:24:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:24:49,437 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 219 transitions. [2022-01-10 03:24:49,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 17 states have internal predecessors, (42), 12 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-01-10 03:24:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 219 transitions. [2022-01-10 03:24:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 03:24:49,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:24:49,441 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:24:49,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 03:24:49,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:24:49,654 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:24:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:24:49,654 INFO L85 PathProgramCache]: Analyzing trace with hash 597113487, now seen corresponding path program 1 times [2022-01-10 03:24:49,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:24:49,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630711402] [2022-01-10 03:24:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:24:49,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:24:49,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:24:49,664 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:24:49,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 03:24:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:24:49,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 03:24:49,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:24:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-10 03:24:50,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:24:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 03:24:56,531 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:24:56,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630711402] [2022-01-10 03:24:56,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630711402] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:24:56,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:24:56,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 20 [2022-01-10 03:24:56,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340911932] [2022-01-10 03:24:56,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:24:56,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 03:24:56,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:24:56,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 03:24:56,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-10 03:24:56,532 INFO L87 Difference]: Start difference. First operand 153 states and 219 transitions. Second operand has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 11 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-01-10 03:25:00,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:25:03,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:25:05,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:25:05,029 INFO L93 Difference]: Finished difference Result 327 states and 467 transitions. [2022-01-10 03:25:05,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 03:25:05,036 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 11 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 73 [2022-01-10 03:25:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:25:05,037 INFO L225 Difference]: With dead ends: 327 [2022-01-10 03:25:05,037 INFO L226 Difference]: Without dead ends: 182 [2022-01-10 03:25:05,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-01-10 03:25:05,039 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 54 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:25:05,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 232 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 371 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-01-10 03:25:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-10 03:25:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 128. [2022-01-10 03:25:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 86 states have internal predecessors, (102), 36 states have call successors, (36), 7 states have call predecessors, (36), 7 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-10 03:25:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 174 transitions. [2022-01-10 03:25:05,064 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 174 transitions. Word has length 73 [2022-01-10 03:25:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:25:05,064 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 174 transitions. [2022-01-10 03:25:05,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 11 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-01-10 03:25:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 174 transitions. [2022-01-10 03:25:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 03:25:05,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:25:05,066 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:25:05,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 03:25:05,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:25:05,266 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:25:05,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:25:05,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2128348972, now seen corresponding path program 1 times [2022-01-10 03:25:05,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:25:05,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859479008] [2022-01-10 03:25:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:25:05,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:25:05,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:25:05,269 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:25:05,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 03:25:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:25:05,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 03:25:05,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:25:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 03:25:07,821 INFO L328 TraceCheckSpWp]: Computing backward predicates...