/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/bitvector/gcd_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:38:39,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:38:39,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:38:39,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:38:39,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 02:38:39,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 02:38:39,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 02:38:39,742 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 02:38:39,755 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:38:39,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:38:39,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:38:39,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:38:39,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:38:39,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:38:39,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:38:39,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:38:39,757 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:38:39,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:38:39,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:38:39,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:38:39,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:38:39,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:38:39,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:38:39,758 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:38:39,758 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:38:39,758 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:38:39,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:38:39,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:38:39,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:38:39,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:38:39,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:38:39,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:38:39,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:38:39,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:38:39,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:38:39,759 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:38:39,759 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:38:39,759 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:38:39,760 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:38:39,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:38:39,760 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:38:39,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:38:39,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:38:39,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:38:39,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:38:39,924 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:38:39,925 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:38:39,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_4.c [2022-01-10 02:38:39,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1a8ffb85/7bfb30df307543a382686d1557299fa7/FLAG47433e602 [2022-01-10 02:38:40,478 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:38:40,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_4.c [2022-01-10 02:38:40,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1a8ffb85/7bfb30df307543a382686d1557299fa7/FLAG47433e602 [2022-01-10 02:38:40,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1a8ffb85/7bfb30df307543a382686d1557299fa7 [2022-01-10 02:38:40,981 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:38:40,983 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:38:40,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:38:40,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:38:40,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:38:40,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:38:40" (1/1) ... [2022-01-10 02:38:40,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b6bd34e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:40, skipping insertion in model container [2022-01-10 02:38:40,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:38:40" (1/1) ... [2022-01-10 02:38:41,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:38:41,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:38:41,263 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_4.c[662,675] [2022-01-10 02:38:41,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:38:41,281 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:38:41,293 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_4.c[662,675] [2022-01-10 02:38:41,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:38:41,311 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:38:41,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:41 WrapperNode [2022-01-10 02:38:41,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:38:41,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:38:41,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:38:41,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:38:41,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:41" (1/1) ... [2022-01-10 02:38:41,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:41" (1/1) ... [2022-01-10 02:38:41,334 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2022-01-10 02:38:41,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:38:41,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:38:41,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:38:41,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:38:41,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:41" (1/1) ... [2022-01-10 02:38:41,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:41" (1/1) ... [2022-01-10 02:38:41,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:41" (1/1) ... [2022-01-10 02:38:41,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:41" (1/1) ... [2022-01-10 02:38:41,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:41" (1/1) ... [2022-01-10 02:38:41,376 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:41" (1/1) ... [2022-01-10 02:38:41,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:41" (1/1) ... [2022-01-10 02:38:41,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:38:41,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:38:41,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:38:41,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:38:41,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:41" (1/1) ... [2022-01-10 02:38:41,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:38:41,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:38:41,410 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 02:38:41,415 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 02:38:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:38:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:38:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:38:41,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:38:41,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 02:38:41,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 02:38:41,473 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:38:41,474 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:38:41,622 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:38:41,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:38:41,625 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 02:38:41,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:38:41 BoogieIcfgContainer [2022-01-10 02:38:41,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:38:41,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:38:41,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:38:41,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:38:41,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:38:40" (1/3) ... [2022-01-10 02:38:41,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdbe59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:38:41, skipping insertion in model container [2022-01-10 02:38:41,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:38:41" (2/3) ... [2022-01-10 02:38:41,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdbe59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:38:41, skipping insertion in model container [2022-01-10 02:38:41,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:38:41" (3/3) ... [2022-01-10 02:38:41,632 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2022-01-10 02:38:41,635 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:38:41,635 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:38:41,662 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:38:41,666 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 02:38:41,666 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:38:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 02:38:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 02:38:41,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:38:41,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:38:41,678 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:38:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:38:41,681 INFO L85 PathProgramCache]: Analyzing trace with hash 705271831, now seen corresponding path program 1 times [2022-01-10 02:38:41,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:38:41,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686098684] [2022-01-10 02:38:41,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:38:41,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:38:41,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:38:41,692 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 02:38:41,693 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 02:38:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:38:41,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:38:41,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:38:41,899 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 02:38:41,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:38:41,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:38:41,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686098684] [2022-01-10 02:38:41,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686098684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:38:41,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:38:41,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:38:41,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669985188] [2022-01-10 02:38:41,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:38:41,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:38:41,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:38:41,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:38:41,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:38:41,923 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:38:41,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:38:41,953 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2022-01-10 02:38:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:38:41,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-10 02:38:41,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:38:41,961 INFO L225 Difference]: With dead ends: 52 [2022-01-10 02:38:41,961 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 02:38:41,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:38:41,965 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:38:41,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 42 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:38:41,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 02:38:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2022-01-10 02:38:41,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:38:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-01-10 02:38:41,991 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2022-01-10 02:38:41,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:38:41,991 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-01-10 02:38:41,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:38:41,992 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-01-10 02:38:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 02:38:41,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:38:41,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:38:42,006 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 02:38:42,203 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 02:38:42,204 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:38:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:38:42,205 INFO L85 PathProgramCache]: Analyzing trace with hash 2105475655, now seen corresponding path program 1 times [2022-01-10 02:38:42,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:38:42,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883203806] [2022-01-10 02:38:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:38:42,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:38:42,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:38:42,209 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 02:38:42,218 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 02:38:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:38:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:38:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:38:42,402 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 02:38:42,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:38:42,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:38:42,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883203806] [2022-01-10 02:38:42,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883203806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:38:42,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:38:42,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:38:42,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430874684] [2022-01-10 02:38:42,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:38:42,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:38:42,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:38:42,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:38:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:38:42,405 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:38:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:38:42,423 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-01-10 02:38:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:38:42,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 02:38:42,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:38:42,424 INFO L225 Difference]: With dead ends: 34 [2022-01-10 02:38:42,424 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 02:38:42,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:38:42,426 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:38:42,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:38:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 02:38:42,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-10 02:38:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:38:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-01-10 02:38:42,430 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2022-01-10 02:38:42,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:38:42,430 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-01-10 02:38:42,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:38:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-01-10 02:38:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 02:38:42,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:38:42,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:38:42,445 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 02:38:42,642 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 02:38:42,643 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:38:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:38:42,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1540999076, now seen corresponding path program 1 times [2022-01-10 02:38:42,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:38:42,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429942374] [2022-01-10 02:38:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:38:42,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:38:42,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:38:42,645 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 02:38:42,663 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 02:38:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:38:42,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:38:42,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:38:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:38:42,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:38:42,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:38:42,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429942374] [2022-01-10 02:38:42,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429942374] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:38:42,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:38:42,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 02:38:42,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878825397] [2022-01-10 02:38:42,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:38:42,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:38:42,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:38:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:38:42,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:38:42,848 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:38:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:38:42,863 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-01-10 02:38:42,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:38:42,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-10 02:38:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:38:42,864 INFO L225 Difference]: With dead ends: 35 [2022-01-10 02:38:42,864 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 02:38:42,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 02:38:42,865 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:38:42,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:38:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 02:38:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-10 02:38:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:38:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-01-10 02:38:42,869 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2022-01-10 02:38:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:38:42,869 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-01-10 02:38:42,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:38:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-01-10 02:38:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 02:38:42,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:38:42,870 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:38:42,895 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 02:38:43,081 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 02:38:43,082 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:38:43,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:38:43,082 INFO L85 PathProgramCache]: Analyzing trace with hash -63151615, now seen corresponding path program 1 times [2022-01-10 02:38:43,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:38:43,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282511661] [2022-01-10 02:38:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:38:43,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:38:43,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:38:43,084 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 02:38:43,085 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 02:38:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:38:43,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 02:38:43,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:38:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:38:43,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:38:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:38:43,450 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:38:43,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282511661] [2022-01-10 02:38:43,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282511661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:38:43,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:38:43,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 02:38:43,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428565773] [2022-01-10 02:38:43,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:38:43,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:38:43,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:38:43,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:38:43,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:38:43,452 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:38:43,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:38:43,516 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-01-10 02:38:43,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:38:43,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 02:38:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:38:43,519 INFO L225 Difference]: With dead ends: 39 [2022-01-10 02:38:43,519 INFO L226 Difference]: Without dead ends: 26 [2022-01-10 02:38:43,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:38:43,520 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:38:43,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:38:43,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-10 02:38:43,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-10 02:38:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:38:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-10 02:38:43,523 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2022-01-10 02:38:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:38:43,524 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-10 02:38:43,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 02:38:43,526 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-10 02:38:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 02:38:43,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:38:43,527 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:38:43,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 02:38:43,736 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 02:38:43,737 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:38:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:38:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash 755367163, now seen corresponding path program 2 times [2022-01-10 02:38:43,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:38:43,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784435171] [2022-01-10 02:38:43,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:38:43,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:38:43,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:38:43,741 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 02:38:43,742 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 02:38:43,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:38:43,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:38:43,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 02:38:43,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:38:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:38:44,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:39:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:39:34,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:39:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784435171] [2022-01-10 02:39:34,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784435171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:39:34,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:39:34,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-01-10 02:39:34,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826969503] [2022-01-10 02:39:34,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:39:34,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 02:39:34,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:39:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 02:39:34,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=258, Unknown=4, NotChecked=0, Total=306 [2022-01-10 02:39:34,191 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)