/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/array-patterns/array13_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:57:01,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:57:01,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:57:01,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 03:57:01,241 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 03:57:01,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:57:01,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:57:01,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:57:01,271 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:57:01,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:57:01,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:57:01,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:57:01,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:57:01,272 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:57:01,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:57:01,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:57:01,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:57:01,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:57:01,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:57:01,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:57:01,274 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:57:01,274 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:57:01,274 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:57:01,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:57:01,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:57:01,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:57:01,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:57:01,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:57:01,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:57:01,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:57:01,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:57:01,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:57:01,275 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:57:01,276 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:57:01,276 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:57:01,276 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:57:01,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:57:01,276 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:57:01,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:57:01,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:57:01,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:57:01,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:57:01,527 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:57:01,528 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:57:01,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array13_pattern.c [2022-01-10 03:57:01,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7be128029/3f52274a9a014ce8be39e1af65b2d0d4/FLAGf1e853325 [2022-01-10 03:57:01,958 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:57:01,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array13_pattern.c [2022-01-10 03:57:01,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7be128029/3f52274a9a014ce8be39e1af65b2d0d4/FLAGf1e853325 [2022-01-10 03:57:02,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7be128029/3f52274a9a014ce8be39e1af65b2d0d4 [2022-01-10 03:57:02,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:57:02,382 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:57:02,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:57:02,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:57:02,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:57:02,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:57:02" (1/1) ... [2022-01-10 03:57:02,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506e4353 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02, skipping insertion in model container [2022-01-10 03:57:02,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:57:02" (1/1) ... [2022-01-10 03:57:02,394 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:57:02,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:57:02,536 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array13_pattern.c[1342,1355] [2022-01-10 03:57:02,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:57:02,576 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:57:02,586 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array13_pattern.c[1342,1355] [2022-01-10 03:57:02,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:57:02,609 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:57:02,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02 WrapperNode [2022-01-10 03:57:02,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:57:02,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:57:02,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:57:02,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:57:02,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02" (1/1) ... [2022-01-10 03:57:02,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02" (1/1) ... [2022-01-10 03:57:02,648 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2022-01-10 03:57:02,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:57:02,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:57:02,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:57:02,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:57:02,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02" (1/1) ... [2022-01-10 03:57:02,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02" (1/1) ... [2022-01-10 03:57:02,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02" (1/1) ... [2022-01-10 03:57:02,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02" (1/1) ... [2022-01-10 03:57:02,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02" (1/1) ... [2022-01-10 03:57:02,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02" (1/1) ... [2022-01-10 03:57:02,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02" (1/1) ... [2022-01-10 03:57:02,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:57:02,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:57:02,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:57:02,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:57:02,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02" (1/1) ... [2022-01-10 03:57:02,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:57:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:57:02,721 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 03:57:02,734 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 03:57:02,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:57:02,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:57:02,762 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-10 03:57:02,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-10 03:57:02,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 03:57:02,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 03:57:02,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:57:02,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:57:02,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 03:57:02,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 03:57:02,817 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:57:02,818 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:57:03,299 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:57:03,317 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:57:03,318 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 03:57:03,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:57:03 BoogieIcfgContainer [2022-01-10 03:57:03,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:57:03,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:57:03,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:57:03,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:57:03,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:57:02" (1/3) ... [2022-01-10 03:57:03,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a53d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:57:03, skipping insertion in model container [2022-01-10 03:57:03,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:57:02" (2/3) ... [2022-01-10 03:57:03,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a53d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:57:03, skipping insertion in model container [2022-01-10 03:57:03,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:57:03" (3/3) ... [2022-01-10 03:57:03,325 INFO L111 eAbstractionObserver]: Analyzing ICFG array13_pattern.c [2022-01-10 03:57:03,329 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:57:03,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:57:03,385 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:57:03,399 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 03:57:03,399 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:57:03,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:57:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 03:57:03,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:57:03,437 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:57:03,438 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:57:03,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:57:03,443 INFO L85 PathProgramCache]: Analyzing trace with hash -152131175, now seen corresponding path program 1 times [2022-01-10 03:57:03,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:57:03,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [797569101] [2022-01-10 03:57:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:57:03,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:57:03,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:57:03,458 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 03:57:03,459 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 03:57:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:57:03,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:57:03,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:57:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 03:57:03,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:57:03,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:57:03,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [797569101] [2022-01-10 03:57:03,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [797569101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:57:03,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:57:03,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:57:03,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416910555] [2022-01-10 03:57:03,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:57:03,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:57:03,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:57:03,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:57:03,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:57:03,681 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:57:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:57:03,700 INFO L93 Difference]: Finished difference Result 59 states and 91 transitions. [2022-01-10 03:57:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:57:03,701 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-10 03:57:03,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:57:03,706 INFO L225 Difference]: With dead ends: 59 [2022-01-10 03:57:03,706 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 03:57:03,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 03:57:03,711 INFO L933 BasicCegarLoop]: 38 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, 38 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 03:57:03,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:57:03,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 03:57:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 03:57:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:57:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-01-10 03:57:03,741 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 15 [2022-01-10 03:57:03,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:57:03,742 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-01-10 03:57:03,742 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 03:57:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-01-10 03:57:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 03:57:03,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:57:03,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:57:03,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 03:57:03,955 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 03:57:03,955 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:57:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:57:03,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2136147464, now seen corresponding path program 1 times [2022-01-10 03:57:03,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:57:03,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464623421] [2022-01-10 03:57:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:57:03,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:57:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:57:03,959 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 03:57:03,959 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 03:57:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:57:04,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:57:04,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:57:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:57:04,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:57:04,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:57:04,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464623421] [2022-01-10 03:57:04,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464623421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:57:04,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:57:04,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 03:57:04,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484093013] [2022-01-10 03:57:04,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:57:04,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:57:04,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:57:04,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:57:04,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:57:04,435 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:57:04,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:57:04,452 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2022-01-10 03:57:04,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:57:04,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-01-10 03:57:04,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:57:04,453 INFO L225 Difference]: With dead ends: 51 [2022-01-10 03:57:04,453 INFO L226 Difference]: Without dead ends: 32 [2022-01-10 03:57:04,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:57:04,455 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:57:04,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 79 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2022-01-10 03:57:04,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-10 03:57:04,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-10 03:57:04,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:57:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-01-10 03:57:04,462 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 28 [2022-01-10 03:57:04,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:57:04,462 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-01-10 03:57:04,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:57:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-01-10 03:57:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 03:57:04,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:57:04,464 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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 03:57:04,479 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 03:57:04,677 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 03:57:04,677 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:57:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:57:04,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1062070342, now seen corresponding path program 1 times [2022-01-10 03:57:04,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:57:04,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784886412] [2022-01-10 03:57:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:57:04,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:57:04,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:57:04,680 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 03:57:04,682 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 03:57:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:57:04,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:57:04,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:57:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:57:05,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:57:05,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:57:05,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784886412] [2022-01-10 03:57:05,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784886412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:57:05,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:57:05,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 03:57:05,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683231740] [2022-01-10 03:57:05,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:57:05,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:57:05,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:57:05,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:57:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:57:05,103 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:57:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:57:05,120 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-01-10 03:57:05,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 03:57:05,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-01-10 03:57:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:57:05,121 INFO L225 Difference]: With dead ends: 56 [2022-01-10 03:57:05,121 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 03:57:05,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:57:05,122 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:57:05,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 72 Unchecked, 0.0s Time] [2022-01-10 03:57:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 03:57:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 03:57:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:57:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-01-10 03:57:05,128 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 31 [2022-01-10 03:57:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:57:05,129 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-01-10 03:57:05,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:57:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-01-10 03:57:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 03:57:05,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:57:05,130 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-10 03:57:05,146 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 03:57:05,330 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 03:57:05,331 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:57:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:57:05,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1662239748, now seen corresponding path program 1 times [2022-01-10 03:57:05,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:57:05,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552101671] [2022-01-10 03:57:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:57:05,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:57:05,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:57:05,334 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 03:57:05,335 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 03:57:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:57:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 03:57:05,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:57:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:57:06,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:57:06,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:57:06,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552101671] [2022-01-10 03:57:06,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552101671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:57:06,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1517036633] [2022-01-10 03:57:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:57:06,235 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:57:06,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:57:06,243 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:57:06,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-01-10 03:57:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:57:06,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:57:06,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:57:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:57:06,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:57:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:57:07,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1517036633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:57:07,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 03:57:07,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 20 [2022-01-10 03:57:07,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007108024] [2022-01-10 03:57:07,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 03:57:07,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 03:57:07,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:57:07,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 03:57:07,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-10 03:57:07,075 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 03:57:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:57:08,365 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2022-01-10 03:57:08,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 03:57:08,374 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 33 [2022-01-10 03:57:08,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:57:08,376 INFO L225 Difference]: With dead ends: 102 [2022-01-10 03:57:08,376 INFO L226 Difference]: Without dead ends: 83 [2022-01-10 03:57:08,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-01-10 03:57:08,378 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 211 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 03:57:08,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 136 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 103 Invalid, 0 Unknown, 144 Unchecked, 0.9s Time] [2022-01-10 03:57:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-10 03:57:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2022-01-10 03:57:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.3) internal successors, (65), 50 states have internal predecessors, (65), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 03:57:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2022-01-10 03:57:08,391 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 33 [2022-01-10 03:57:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:57:08,391 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2022-01-10 03:57:08,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-10 03:57:08,392 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2022-01-10 03:57:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 03:57:08,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:57:08,393 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-10 03:57:08,404 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 03:57:08,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-01-10 03:57:08,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-01-10 03:57:08,794 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:57:08,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:57:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash -980983847, now seen corresponding path program 1 times [2022-01-10 03:57:08,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:57:08,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901667581] [2022-01-10 03:57:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:57:08,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:57:08,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:57:08,797 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 03:57:08,800 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 03:57:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:57:08,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 03:57:08,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:57:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:57:09,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:57:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 03:57:09,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:57:09,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901667581] [2022-01-10 03:57:09,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901667581] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:57:09,612 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:57:09,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-01-10 03:57:09,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616713115] [2022-01-10 03:57:09,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:57:09,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 03:57:09,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:57:09,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 03:57:09,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:57:09,613 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:57:10,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:57:10,328 INFO L93 Difference]: Finished difference Result 87 states and 110 transitions. [2022-01-10 03:57:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 03:57:10,329 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2022-01-10 03:57:10,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:57:10,331 INFO L225 Difference]: With dead ends: 87 [2022-01-10 03:57:10,331 INFO L226 Difference]: Without dead ends: 79 [2022-01-10 03:57:10,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-01-10 03:57:10,332 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 03:57:10,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 109 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 47 Invalid, 0 Unknown, 54 Unchecked, 0.5s Time] [2022-01-10 03:57:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-10 03:57:10,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2022-01-10 03:57:10,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 03:57:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-01-10 03:57:10,342 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 36 [2022-01-10 03:57:10,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:57:10,343 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-01-10 03:57:10,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:57:10,343 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-01-10 03:57:10,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 03:57:10,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:57:10,344 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 03:57:10,356 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 03:57:10,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:57:10,557 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:57:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:57:10,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2124903680, now seen corresponding path program 2 times [2022-01-10 03:57:10,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:57:10,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089214533] [2022-01-10 03:57:10,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:57:10,558 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:57:10,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:57:10,558 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:57:10,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 03:57:10,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:57:10,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:57:10,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:57:10,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:57:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 03:57:11,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:57:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:57:11,501 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:57:11,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089214533] [2022-01-10 03:57:11,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089214533] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:57:11,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:57:11,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-01-10 03:57:11,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392423109] [2022-01-10 03:57:11,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:57:11,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 03:57:11,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:57:11,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 03:57:11,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-10 03:57:11,503 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:57:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:57:11,875 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2022-01-10 03:57:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 03:57:11,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2022-01-10 03:57:11,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:57:11,879 INFO L225 Difference]: With dead ends: 110 [2022-01-10 03:57:11,879 INFO L226 Difference]: Without dead ends: 106 [2022-01-10 03:57:11,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-01-10 03:57:11,880 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:57:11,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 90 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-01-10 03:57:11,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-10 03:57:11,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 66. [2022-01-10 03:57:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.290909090909091) internal successors, (71), 55 states have internal predecessors, (71), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 03:57:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2022-01-10 03:57:11,900 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 37 [2022-01-10 03:57:11,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:57:11,901 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2022-01-10 03:57:11,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 03:57:11,901 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2022-01-10 03:57:11,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 03:57:11,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:57:11,902 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 03:57:11,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 03:57:12,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:57:12,117 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:57:12,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:57:12,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1360716990, now seen corresponding path program 1 times [2022-01-10 03:57:12,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:57:12,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149359079] [2022-01-10 03:57:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:57:12,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:57:12,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:57:12,119 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 03:57:12,119 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 03:57:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:57:12,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 03:57:12,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:57:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:57:12,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:57:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 03:57:13,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:57:13,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149359079] [2022-01-10 03:57:13,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149359079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:57:13,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:57:13,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2022-01-10 03:57:13,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043289006] [2022-01-10 03:57:13,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:57:13,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:57:13,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:57:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:57:13,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:57:13,769 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 03:57:17,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:57:17,283 INFO L93 Difference]: Finished difference Result 140 states and 186 transitions. [2022-01-10 03:57:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-10 03:57:17,285 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2022-01-10 03:57:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:57:17,286 INFO L225 Difference]: With dead ends: 140 [2022-01-10 03:57:17,286 INFO L226 Difference]: Without dead ends: 108 [2022-01-10 03:57:17,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=441, Invalid=1281, Unknown=0, NotChecked=0, Total=1722 [2022-01-10 03:57:17,288 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:57:17,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 176 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 163 Invalid, 0 Unknown, 136 Unchecked, 1.3s Time] [2022-01-10 03:57:17,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-10 03:57:17,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2022-01-10 03:57:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 88 states have (on average 1.3409090909090908) internal successors, (118), 88 states have internal predecessors, (118), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-10 03:57:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 132 transitions. [2022-01-10 03:57:17,306 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 132 transitions. Word has length 37 [2022-01-10 03:57:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:57:17,306 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 132 transitions. [2022-01-10 03:57:17,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 03:57:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 132 transitions. [2022-01-10 03:57:17,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 03:57:17,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:57:17,308 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1] [2022-01-10 03:57:17,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 03:57:17,515 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 03:57:17,516 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:57:17,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:57:17,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1967381381, now seen corresponding path program 1 times [2022-01-10 03:57:17,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:57:17,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742385737] [2022-01-10 03:57:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:57:17,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:57:17,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:57:17,518 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 03:57:17,519 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 03:57:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:57:17,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-10 03:57:17,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:57:18,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-01-10 03:57:20,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 03:57:20,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 03:57:20,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 43 [2022-01-10 03:57:21,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 12 [2022-01-10 03:57:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:57:21,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:57:44,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:57:44,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742385737] [2022-01-10 03:57:44,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742385737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 03:57:44,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [277037375] [2022-01-10 03:57:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:57:44,505 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 03:57:44,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 03:57:44,506 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 03:57:44,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-01-10 03:57:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:57:45,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-10 03:57:45,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:57:50,778 INFO L353 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2022-01-10 03:57:50,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-10 03:58:01,235 INFO L353 Elim1Store]: treesize reduction 208, result has 5.0 percent of original size [2022-01-10 03:58:01,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 36 [2022-01-10 03:58:08,714 INFO L353 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2022-01-10 03:58:08,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 16 [2022-01-10 03:58:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:58:08,951 INFO L328 TraceCheckSpWp]: Computing backward predicates...