/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/egcd2-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:08:36,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:08:36,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:08:36,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:08:36,244 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 03:08:36,271 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:08:36,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:08:36,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:08:36,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:08:36,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:08:36,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:08:36,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:08:36,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:08:36,273 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:08:36,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:08:36,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:08:36,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:08:36,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:08:36,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:08:36,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:08:36,274 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:08:36,274 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:08:36,274 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:08:36,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:08:36,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:08:36,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:08:36,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:08:36,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:08:36,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:08:36,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:08:36,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:08:36,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:08:36,276 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:08:36,276 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:08:36,276 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:08:36,277 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:08:36,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:08:36,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:08:36,277 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:08:36,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:08:36,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:08:36,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:08:36,492 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:08:36,492 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:08:36,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c [2022-01-10 03:08:36,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cee1b2ee/3cbf78eaa7794e44859a57ec8a5f54ee/FLAG66d7544f2 [2022-01-10 03:08:36,892 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:08:36,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c [2022-01-10 03:08:36,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cee1b2ee/3cbf78eaa7794e44859a57ec8a5f54ee/FLAG66d7544f2 [2022-01-10 03:08:36,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cee1b2ee/3cbf78eaa7794e44859a57ec8a5f54ee [2022-01-10 03:08:36,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:08:36,908 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:08:36,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:08:36,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:08:36,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:08:36,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:08:36" (1/1) ... [2022-01-10 03:08:36,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7f7cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:36, skipping insertion in model container [2022-01-10 03:08:36,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:08:36" (1/1) ... [2022-01-10 03:08:36,919 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:08:36,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:08:37,079 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/egcd2-ll_valuebound1.c[490,503] [2022-01-10 03:08:37,106 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:08:37,112 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:08:37,123 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/egcd2-ll_valuebound1.c[490,503] [2022-01-10 03:08:37,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:08:37,149 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:08:37,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37 WrapperNode [2022-01-10 03:08:37,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:08:37,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:08:37,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:08:37,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:08:37,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ... [2022-01-10 03:08:37,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ... [2022-01-10 03:08:37,182 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2022-01-10 03:08:37,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:08:37,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:08:37,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:08:37,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:08:37,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ... [2022-01-10 03:08:37,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ... [2022-01-10 03:08:37,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ... [2022-01-10 03:08:37,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ... [2022-01-10 03:08:37,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ... [2022-01-10 03:08:37,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ... [2022-01-10 03:08:37,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ... [2022-01-10 03:08:37,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:08:37,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:08:37,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:08:37,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:08:37,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (1/1) ... [2022-01-10 03:08:37,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:08:37,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:08:37,236 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 03:08:37,257 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 03:08:37,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:08:37,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:08:37,267 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:08:37,267 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:08:37,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:08:37,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:08:37,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 03:08:37,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 03:08:37,305 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:08:37,306 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:08:37,598 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:08:37,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:08:37,602 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 03:08:37,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:08:37 BoogieIcfgContainer [2022-01-10 03:08:37,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:08:37,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:08:37,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:08:37,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:08:37,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:08:36" (1/3) ... [2022-01-10 03:08:37,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373465e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:08:37, skipping insertion in model container [2022-01-10 03:08:37,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:08:37" (2/3) ... [2022-01-10 03:08:37,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373465e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:08:37, skipping insertion in model container [2022-01-10 03:08:37,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:08:37" (3/3) ... [2022-01-10 03:08:37,608 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound1.c [2022-01-10 03:08:37,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:08:37,611 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:08:37,636 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:08:37,640 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 03:08:37,640 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:08:37,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-10 03:08:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 03:08:37,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:08:37,653 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 03:08:37,654 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:08:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:08:37,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2022-01-10 03:08:37,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:08:37,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647191869] [2022-01-10 03:08:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:08:37,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:08:37,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:08:37,669 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 03:08:37,727 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 03:08:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:08:37,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:08:37,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:08:37,959 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 03:08:37,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:08:37,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:08:37,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647191869] [2022-01-10 03:08:37,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647191869] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:08:37,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:08:37,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:08:37,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652232470] [2022-01-10 03:08:37,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:08:37,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:08:37,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:08:37,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:08:37,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:08:37,988 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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 03:08:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:08:38,002 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2022-01-10 03:08:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:08:38,004 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 03:08:38,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:08:38,008 INFO L225 Difference]: With dead ends: 67 [2022-01-10 03:08:38,008 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 03:08:38,010 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 03:08:38,013 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 03:08:38,013 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 03:08:38,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 03:08:38,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-10 03:08:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-10 03:08:38,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-01-10 03:08:38,041 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-01-10 03:08:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:08:38,041 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-01-10 03:08:38,041 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 03:08:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-01-10 03:08:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 03:08:38,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:08:38,043 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, 1] [2022-01-10 03:08:38,054 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 03:08:38,253 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 03:08:38,254 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:08:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:08:38,256 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2022-01-10 03:08:38,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:08:38,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096962568] [2022-01-10 03:08:38,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:08:38,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:08:38,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:08:38,260 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 03:08:38,262 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 03:08:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:08:38,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:08:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:08:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 03:08:38,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:08:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 03:08:38,880 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:08:38,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096962568] [2022-01-10 03:08:38,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096962568] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:08:38,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:08:38,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2022-01-10 03:08:38,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169553568] [2022-01-10 03:08:38,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:08:38,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 03:08:38,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:08:38,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 03:08:38,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-10 03:08:38,882 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-01-10 03:08:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:08:39,112 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-01-10 03:08:39,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 03:08:39,112 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 40 [2022-01-10 03:08:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:08:39,113 INFO L225 Difference]: With dead ends: 41 [2022-01-10 03:08:39,113 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 03:08:39,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:08:39,114 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:08:39,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 173 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-10 03:08:39,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 03:08:39,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 03:08:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-10 03:08:39,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-01-10 03:08:39,121 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2022-01-10 03:08:39,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:08:39,122 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-01-10 03:08:39,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-01-10 03:08:39,122 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-01-10 03:08:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 03:08:39,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:08:39,123 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, 1, 1] [2022-01-10 03:08:39,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 03:08:39,331 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 03:08:39,332 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:08:39,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:08:39,332 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2022-01-10 03:08:39,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:08:39,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421090127] [2022-01-10 03:08:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:08:39,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:08:39,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:08:39,335 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 03:08:39,347 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 03:08:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:08:39,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 03:08:39,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:08:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 03:08:39,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:08:41,396 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 03:08:41,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:08:41,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421090127] [2022-01-10 03:08:41,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421090127] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:08:41,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:08:41,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-01-10 03:08:41,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443421626] [2022-01-10 03:08:41,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:08:41,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:08:41,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:08:41,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:08:41,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:08:41,398 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 03:08:43,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:08:46,136 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 03:08:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:08:47,598 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-01-10 03:08:47,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:08:47,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 41 [2022-01-10 03:08:47,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:08:47,609 INFO L225 Difference]: With dead ends: 46 [2022-01-10 03:08:47,609 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 03:08:47,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:08:47,610 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:08:47,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 146 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-01-10 03:08:47,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 03:08:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-01-10 03:08:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-10 03:08:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-01-10 03:08:47,616 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 41 [2022-01-10 03:08:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:08:47,616 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-01-10 03:08:47,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 03:08:47,616 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-01-10 03:08:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 03:08:47,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:08:47,617 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, 1] [2022-01-10 03:08:47,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 03:08:47,826 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 03:08:47,826 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:08:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:08:47,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2022-01-10 03:08:47,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:08:47,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953466044] [2022-01-10 03:08:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:08:47,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:08:47,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:08:47,829 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 03:08:47,833 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 03:08:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:08:48,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 03:08:48,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:08:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 03:08:48,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:08:55,571 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 03:08:55,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:08:55,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953466044] [2022-01-10 03:08:55,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953466044] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:08:55,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:08:55,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-01-10 03:08:55,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318267460] [2022-01-10 03:08:55,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:08:55,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:08:55,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:08:55,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:08:55,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:08:55,573 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 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 03:09:00,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-10 03:09:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:09:02,675 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2022-01-10 03:09:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:09:02,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 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 46 [2022-01-10 03:09:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:09:02,694 INFO L225 Difference]: With dead ends: 54 [2022-01-10 03:09:02,694 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 03:09:02,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:09:02,695 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-01-10 03:09:02,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 155 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-01-10 03:09:02,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 03:09:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-01-10 03:09:02,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-10 03:09:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2022-01-10 03:09:02,702 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 46 [2022-01-10 03:09:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:09:02,703 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2022-01-10 03:09:02,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 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 03:09:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2022-01-10 03:09:02,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 03:09:02,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:09:02,706 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, 1] [2022-01-10 03:09:02,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 03:09:02,907 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 03:09:02,907 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:09:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:09:02,908 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2022-01-10 03:09:02,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:09:02,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988870783] [2022-01-10 03:09:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:09:02,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:09:02,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:09:02,910 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 03:09:02,913 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 03:09:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:09:03,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-10 03:09:03,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:09:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-10 03:09:04,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:09:10,643 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 03:09:10,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:09:10,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988870783] [2022-01-10 03:09:10,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988870783] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 03:09:10,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 03:09:10,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-01-10 03:09:10,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755942738] [2022-01-10 03:09:10,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:09:10,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:09:10,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:09:10,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:09:10,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-10 03:09:10,645 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 03:09:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:09:17,424 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2022-01-10 03:09:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:09:17,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 51 [2022-01-10 03:09:17,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:09:17,441 INFO L225 Difference]: With dead ends: 58 [2022-01-10 03:09:17,441 INFO L226 Difference]: Without dead ends: 56 [2022-01-10 03:09:17,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:09:17,442 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-01-10 03:09:17,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 146 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-01-10 03:09:17,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-10 03:09:17,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-01-10 03:09:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-10 03:09:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2022-01-10 03:09:17,449 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 51 [2022-01-10 03:09:17,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:09:17,449 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2022-01-10 03:09:17,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 03:09:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2022-01-10 03:09:17,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-10 03:09:17,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:09:17,450 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 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 03:09:17,464 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 03:09:17,662 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 03:09:17,662 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:09:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:09:17,663 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2022-01-10 03:09:17,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:09:17,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793924] [2022-01-10 03:09:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:09:17,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:09:17,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:09:17,664 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 03:09:17,665 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 03:09:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:09:18,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 03:09:18,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:09:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 03:09:22,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:09:34,263 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:09:34,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793924] [2022-01-10 03:09:34,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793924] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:09:34,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [62456593] [2022-01-10 03:09:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:09:34,264 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:09:34,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:09:34,267 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 03:09:34,268 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 03:09:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:09:34,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:09:34,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:09:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-10 03:09:41,036 INFO L328 TraceCheckSpWp]: Computing backward predicates...