/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/list-simple/sll2n_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:09:41,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:09:41,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:09:41,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 06:09:41,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:09:41,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:09:41,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:09:41,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:09:41,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:09:41,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:09:41,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:09:41,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:09:41,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:09:41,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:09:41,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:09:41,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:09:41,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 06:09:41,787 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 06:09:41,802 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:09:41,802 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:09:41,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:09:41,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:09:41,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:09:41,803 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:09:41,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:09:41,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:09:41,803 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:09:41,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:09:41,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:09:41,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:09:41,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:09:41,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:09:41,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:09:41,804 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:09:41,804 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:09:41,804 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:09:41,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:09:41,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:09:41,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:09:41,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:09:41,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:09:41,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:09:41,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:09:41,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:09:41,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:09:41,805 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:09:41,805 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:09:41,805 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:09:41,805 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:09:41,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:09:41,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:09:41,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:09:42,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:09:42,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:09:42,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:09:42,038 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:09:42,038 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:09:42,039 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_prepend_equal.i [2022-01-10 06:09:42,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41081fa96/680e7fee0c4849048c5bf48d7499b4ee/FLAG092b7623f [2022-01-10 06:09:42,550 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:09:42,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_prepend_equal.i [2022-01-10 06:09:42,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41081fa96/680e7fee0c4849048c5bf48d7499b4ee/FLAG092b7623f [2022-01-10 06:09:43,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41081fa96/680e7fee0c4849048c5bf48d7499b4ee [2022-01-10 06:09:43,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:09:43,081 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:09:43,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:09:43,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:09:43,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:09:43,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:09:43" (1/1) ... [2022-01-10 06:09:43,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@341c4f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43, skipping insertion in model container [2022-01-10 06:09:43,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:09:43" (1/1) ... [2022-01-10 06:09:43,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:09:43,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:09:43,389 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_prepend_equal.i[24076,24089] [2022-01-10 06:09:43,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:09:43,401 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:09:43,453 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_prepend_equal.i[24076,24089] [2022-01-10 06:09:43,454 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:09:43,480 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:09:43,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43 WrapperNode [2022-01-10 06:09:43,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:09:43,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:09:43,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:09:43,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:09:43,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43" (1/1) ... [2022-01-10 06:09:43,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43" (1/1) ... [2022-01-10 06:09:43,540 INFO L137 Inliner]: procedures = 130, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 104 [2022-01-10 06:09:43,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:09:43,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:09:43,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:09:43,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:09:43,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43" (1/1) ... [2022-01-10 06:09:43,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43" (1/1) ... [2022-01-10 06:09:43,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43" (1/1) ... [2022-01-10 06:09:43,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43" (1/1) ... [2022-01-10 06:09:43,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43" (1/1) ... [2022-01-10 06:09:43,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43" (1/1) ... [2022-01-10 06:09:43,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43" (1/1) ... [2022-01-10 06:09:43,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:09:43,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:09:43,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:09:43,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:09:43,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43" (1/1) ... [2022-01-10 06:09:43,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:09:43,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:09:43,609 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 06:09:43,630 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 06:09:43,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 06:09:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-01-10 06:09:43,641 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-01-10 06:09:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 06:09:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:09:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 06:09:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 06:09:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 06:09:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 06:09:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 06:09:43,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-01-10 06:09:43,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:09:43,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:09:43,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:09:43,739 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:09:43,740 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:09:43,954 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:09:43,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:09:43,958 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 06:09:43,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:09:43 BoogieIcfgContainer [2022-01-10 06:09:43,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:09:43,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:09:43,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:09:43,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:09:43,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:09:43" (1/3) ... [2022-01-10 06:09:43,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b36291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:09:43, skipping insertion in model container [2022-01-10 06:09:43,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:09:43" (2/3) ... [2022-01-10 06:09:43,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b36291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:09:43, skipping insertion in model container [2022-01-10 06:09:43,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:09:43" (3/3) ... [2022-01-10 06:09:43,969 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2022-01-10 06:09:43,974 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:09:43,975 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:09:44,019 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:09:44,030 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 06:09:44,031 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:09:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:09:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 06:09:44,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:09:44,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:09:44,051 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:09:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:09:44,056 INFO L85 PathProgramCache]: Analyzing trace with hash 845524335, now seen corresponding path program 1 times [2022-01-10 06:09:44,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:09:44,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [371890963] [2022-01-10 06:09:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:09:44,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:09:44,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:09:44,069 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 06:09:44,070 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 06:09:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:09:44,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:09:44,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:09:44,260 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 06:09:44,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:09:44,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:09:44,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [371890963] [2022-01-10 06:09:44,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [371890963] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:09:44,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:09:44,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:09:44,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595964350] [2022-01-10 06:09:44,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:09:44,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:09:44,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:09:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:09:44,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:09:44,293 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 06:09:44,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:09:44,308 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2022-01-10 06:09:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:09:44,313 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 16 [2022-01-10 06:09:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:09:44,318 INFO L225 Difference]: With dead ends: 48 [2022-01-10 06:09:44,318 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 06:09:44,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 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 06:09:44,324 INFO L933 BasicCegarLoop]: 32 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, 32 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 06:09:44,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:09:44,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 06:09:44,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 06:09:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:09:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-01-10 06:09:44,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2022-01-10 06:09:44,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:09:44,358 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-01-10 06:09:44,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 06:09:44,358 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-01-10 06:09:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 06:09:44,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:09:44,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:09:44,369 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 06:09:44,566 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 06:09:44,567 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:09:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:09:44,568 INFO L85 PathProgramCache]: Analyzing trace with hash 595026039, now seen corresponding path program 1 times [2022-01-10 06:09:44,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:09:44,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304276276] [2022-01-10 06:09:44,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:09:44,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:09:44,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:09:44,571 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 06:09:44,573 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 06:09:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:09:44,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:09:44,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:09:44,755 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 06:09:44,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:09:44,756 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:09:44,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304276276] [2022-01-10 06:09:44,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304276276] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:09:44,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:09:44,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:09:44,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7505075] [2022-01-10 06:09:44,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:09:44,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:09:44,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:09:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:09:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:09:44,763 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 06:09:44,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:09:44,775 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-01-10 06:09:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:09:44,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 16 [2022-01-10 06:09:44,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:09:44,777 INFO L225 Difference]: With dead ends: 40 [2022-01-10 06:09:44,778 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 06:09:44,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 06:09:44,781 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:09:44,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:09:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 06:09:44,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-01-10 06:09:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:09:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-10 06:09:44,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2022-01-10 06:09:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:09:44,794 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-10 06:09:44,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 06:09:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-10 06:09:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 06:09:44,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:09:44,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:09:44,807 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 06:09:45,010 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 06:09:45,011 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:09:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:09:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash -190501289, now seen corresponding path program 1 times [2022-01-10 06:09:45,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:09:45,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47828072] [2022-01-10 06:09:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:09:45,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:09:45,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:09:45,019 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 06:09:45,020 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 06:09:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:09:45,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:09:45,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:09:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:09:45,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:09:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:09:45,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:09:45,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47828072] [2022-01-10 06:09:45,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47828072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:09:45,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:09:45,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:09:45,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684445128] [2022-01-10 06:09:45,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:09:45,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:09:45,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:09:45,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:09:45,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:09:45,257 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 06:09:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:09:45,300 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-01-10 06:09:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:09:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-01-10 06:09:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:09:45,332 INFO L225 Difference]: With dead ends: 44 [2022-01-10 06:09:45,332 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 06:09:45,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:09:45,333 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:09:45,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 66 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:09:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 06:09:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-01-10 06:09:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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 06:09:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-10 06:09:45,337 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 25 [2022-01-10 06:09:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:09:45,337 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-10 06:09:45,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 06:09:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-10 06:09:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 06:09:45,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:09:45,338 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:09:45,354 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 06:09:45,546 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 06:09:45,547 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:09:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:09:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1242497929, now seen corresponding path program 2 times [2022-01-10 06:09:45,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:09:45,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653039458] [2022-01-10 06:09:45,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:09:45,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:09:45,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:09:45,551 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 06:09:45,553 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 06:09:45,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 06:09:45,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:09:45,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 06:09:45,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:09:45,968 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 11 treesize of output 7 [2022-01-10 06:09:46,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:46,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:46,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-01-10 06:09:46,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:46,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:46,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-01-10 06:09:46,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-01-10 06:09:46,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-01-10 06:09:46,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:46,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-10 06:09:46,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-01-10 06:09:46,351 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 26 treesize of output 14 [2022-01-10 06:09:46,362 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 15 treesize of output 7 [2022-01-10 06:09:46,428 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 15 treesize of output 7 [2022-01-10 06:09:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:09:46,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:09:46,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:09:46,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653039458] [2022-01-10 06:09:46,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653039458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:09:46,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:09:46,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-10 06:09:46,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61877957] [2022-01-10 06:09:46,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:09:46,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 06:09:46,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:09:46,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 06:09:46,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:09:46,451 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:09:46,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:09:46,649 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-01-10 06:09:46,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 06:09:46,650 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-01-10 06:09:46,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:09:46,651 INFO L225 Difference]: With dead ends: 30 [2022-01-10 06:09:46,651 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 06:09:46,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-01-10 06:09:46,652 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:09:46,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 78 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-01-10 06:09:46,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 06:09:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 06:09:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 06:09:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-01-10 06:09:46,657 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 34 [2022-01-10 06:09:46,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:09:46,658 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-01-10 06:09:46,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:09:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-01-10 06:09:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 06:09:46,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:09:46,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:09:46,668 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 06:09:46,866 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 06:09:46,867 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:09:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:09:46,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1242499603, now seen corresponding path program 1 times [2022-01-10 06:09:46,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:09:46,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365946410] [2022-01-10 06:09:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:09:46,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:09:46,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:09:46,869 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 06:09:46,870 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 06:09:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:09:47,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 06:09:47,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:09:47,219 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-10 06:09:47,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-01-10 06:09:47,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-10 06:09:47,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-10 06:09:47,281 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 11 treesize of output 7 [2022-01-10 06:09:47,351 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 06:09:47,351 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2022-01-10 06:09:47,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 16 [2022-01-10 06:09:47,379 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 16 treesize of output 8 [2022-01-10 06:09:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 06:09:47,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:09:47,395 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:09:47,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365946410] [2022-01-10 06:09:47,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365946410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:09:47,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:09:47,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 06:09:47,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720594015] [2022-01-10 06:09:47,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:09:47,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 06:09:47,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:09:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 06:09:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:09:47,397 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:09:47,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:09:47,641 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-10 06:09:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:09:47,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-01-10 06:09:47,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:09:47,642 INFO L225 Difference]: With dead ends: 31 [2022-01-10 06:09:47,642 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 06:09:47,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:09:47,643 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:09:47,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 107 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:09:47,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 06:09:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 06:09:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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 06:09:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-10 06:09:47,648 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2022-01-10 06:09:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:09:47,649 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-10 06:09:47,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 06:09:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-10 06:09:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 06:09:47,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:09:47,650 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:09:47,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:09:47,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:09:47,862 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:09:47,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:09:47,862 INFO L85 PathProgramCache]: Analyzing trace with hash -39567630, now seen corresponding path program 1 times [2022-01-10 06:09:47,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:09:47,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850142217] [2022-01-10 06:09:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:09:47,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:09:47,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:09:47,864 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 06:09:47,866 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 06:09:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:09:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 79 conjunts are in the unsatisfiable core [2022-01-10 06:09:48,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:09:48,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-01-10 06:09:48,574 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 11 treesize of output 7 [2022-01-10 06:09:48,743 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 6 treesize of output 5 [2022-01-10 06:09:48,755 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 6 treesize of output 5 [2022-01-10 06:09:48,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:48,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-10 06:09:49,150 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 30 treesize of output 18 [2022-01-10 06:09:49,159 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 7 treesize of output 3 [2022-01-10 06:09:49,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 5 [2022-01-10 06:09:49,173 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 7 treesize of output 3 [2022-01-10 06:09:49,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:49,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-01-10 06:09:49,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:49,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-10 06:09:49,669 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-01-10 06:09:49,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 17 [2022-01-10 06:09:49,797 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-10 06:09:49,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-01-10 06:09:49,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-01-10 06:09:50,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:50,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:50,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 06:09:50,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:50,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18 [2022-01-10 06:09:50,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:50,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 29 [2022-01-10 06:09:50,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:09:50,754 INFO L353 Elim1Store]: treesize reduction 31, result has 8.8 percent of original size [2022-01-10 06:09:50,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 47 [2022-01-10 06:09:50,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:50,795 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-10 06:09:50,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-01-10 06:09:51,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-10 06:09:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:09:51,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:09:53,474 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_343 (Array (_ BitVec 64) (_ BitVec 32))) (v_ArrVal_357 (Array (_ BitVec 64) (_ BitVec 64))) (|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_15| (_ BitVec 64)) (v_ArrVal_356 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_338 (Array (_ BitVec 64) (_ BitVec 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_15|))) (not (bvult |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_15| |c_#StackHeapBarrier|)) (= (let ((.cse3 (let ((.cse5 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_15| (store v_ArrVal_357 (_ bv4 64) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_15| v_ArrVal_357) |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse5 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse5 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| (_ bv0 64))))) (.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_15| (store v_ArrVal_356 (_ bv4 64) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_15| v_ArrVal_356) |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_15|))))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (bvadd (_ bv4 64) (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store (store |c_#memory_int| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_15| v_ArrVal_343) |c_ULTIMATE.start_sll_prepend_~head#1.base| v_ArrVal_338) (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2)))) |c_ULTIMATE.start_main_~data~0#1|))) is different from false [2022-01-10 06:09:53,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:09:53,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850142217] [2022-01-10 06:09:53,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850142217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:09:53,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [215453234] [2022-01-10 06:09:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:09:53,517 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:09:53,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:09:53,519 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:09:53,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-01-10 06:09:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:09:54,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 74 conjunts are in the unsatisfiable core [2022-01-10 06:09:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:09:54,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-01-10 06:09:54,351 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 11 treesize of output 7 [2022-01-10 06:09:54,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:54,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-10 06:09:55,553 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 30 treesize of output 18 [2022-01-10 06:09:55,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 5 [2022-01-10 06:09:55,578 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 7 treesize of output 3 [2022-01-10 06:09:55,585 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 7 treesize of output 3 [2022-01-10 06:09:55,870 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-10 06:09:55,870 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 14 treesize of output 20 [2022-01-10 06:09:55,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-01-10 06:09:55,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:55,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-01-10 06:09:55,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:55,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-10 06:09:55,982 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-01-10 06:09:55,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 17 [2022-01-10 06:09:56,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:56,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:56,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-01-10 06:09:56,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:56,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:56,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 06:09:56,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:56,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 45 [2022-01-10 06:09:56,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:56,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-01-10 06:09:56,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 39 treesize of output 30 [2022-01-10 06:09:56,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-10 06:09:56,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:56,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-01-10 06:09:56,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 28 treesize of output 23 [2022-01-10 06:09:56,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-01-10 06:09:57,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:57,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 06:09:57,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:09:57,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 47 [2022-01-10 06:09:57,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:09:57,400 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-10 06:09:57,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-01-10 06:09:57,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-10 06:09:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:09:57,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:09:57,961 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_437 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_435 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_440 (Array (_ BitVec 64) (_ BitVec 32))) (v_ArrVal_438 (Array (_ BitVec 64) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse4 (bvadd |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| (_ bv4 64)))) (let ((.cse3 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) .cse4 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| v_ArrVal_437) |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset|))) (.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) .cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| v_ArrVal_435) |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (bvadd (_ bv4 64) (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| v_ArrVal_438) |c_ULTIMATE.start_sll_prepend_~head#1.base| v_ArrVal_440) (select (select .cse0 .cse1) .cse2)) (select (select .cse3 .cse1) .cse2))))))) is different from false [2022-01-10 06:10:03,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [215453234] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:10:03,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:10:03,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2022-01-10 06:10:03,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402441327] [2022-01-10 06:10:03,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:10:03,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 06:10:03,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:10:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 06:10:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=990, Unknown=37, NotChecked=130, Total=1260 [2022-01-10 06:10:03,332 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 27 states, 25 states have (on average 1.64) internal successors, (41), 22 states have internal predecessors, (41), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 06:10:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:10:06,356 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-01-10 06:10:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 06:10:06,357 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.64) internal successors, (41), 22 states have internal predecessors, (41), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2022-01-10 06:10:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:10:06,358 INFO L225 Difference]: With dead ends: 37 [2022-01-10 06:10:06,358 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 06:10:06,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=158, Invalid=1450, Unknown=40, NotChecked=158, Total=1806 [2022-01-10 06:10:06,360 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 06:10:06,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 192 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 209 Invalid, 0 Unknown, 130 Unchecked, 0.9s Time] [2022-01-10 06:10:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 06:10:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-10 06:10:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 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 06:10:06,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-10 06:10:06,369 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 36 [2022-01-10 06:10:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:10:06,369 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-10 06:10:06,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.64) internal successors, (41), 22 states have internal predecessors, (41), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 06:10:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-10 06:10:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 06:10:06,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:10:06,370 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:10:06,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-01-10 06:10:06,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 06:10:06,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:10:06,776 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:10:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:10:06,777 INFO L85 PathProgramCache]: Analyzing trace with hash -39569304, now seen corresponding path program 1 times [2022-01-10 06:10:06,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:10:06,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719282877] [2022-01-10 06:10:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:10:06,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:10:06,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:10:06,779 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 06:10:06,780 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 06:10:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:10:07,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-10 06:10:07,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:07,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-10 06:10:07,471 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 8 treesize of output 4 [2022-01-10 06:10:07,738 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-10 06:10:07,738 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 15 treesize of output 21 [2022-01-10 06:10:07,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-01-10 06:10:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:07,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:07,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-01-10 06:10:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:08,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:08,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-01-10 06:10:08,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:08,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-10 06:10:08,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 25 treesize of output 20 [2022-01-10 06:10:08,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-10 06:10:08,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-01-10 06:10:08,134 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 15 treesize of output 7 [2022-01-10 06:10:08,275 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-10 06:10:08,275 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-01-10 06:10:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:10:08,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:10:08,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:10:08,632 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 938 treesize of output 935 [2022-01-10 06:10:08,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1210 treesize of output 1202 [2022-01-10 06:10:08,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1202 treesize of output 1198 [2022-01-10 06:10:08,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 140 treesize of output 138 [2022-01-10 06:10:08,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 66 treesize of output 64 [2022-01-10 06:10:08,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 66 treesize of output 64 [2022-01-10 06:10:20,870 WARN L228 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 80 DAG size of output: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 06:10:27,378 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:10:27,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719282877] [2022-01-10 06:10:27,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719282877] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:10:27,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1403544347] [2022-01-10 06:10:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:10:27,379 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-01-10 06:10:27,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-01-10 06:10:27,380 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-01-10 06:10:27,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-01-10 06:10:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:10:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-10 06:10:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:29,400 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 8 treesize of output 4 [2022-01-10 06:10:29,644 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-01-10 06:10:29,645 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 15 treesize of output 21 [2022-01-10 06:10:29,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-01-10 06:10:29,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:29,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:29,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-01-10 06:10:29,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:30,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:30,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-01-10 06:10:30,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:30,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-10 06:10:30,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 25 treesize of output 20 [2022-01-10 06:10:30,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-10 06:10:30,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 7 [2022-01-10 06:10:30,378 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 15 treesize of output 7 [2022-01-10 06:10:30,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:10:30,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-01-10 06:10:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 06:10:30,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:10:31,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 06:10:31,042 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 464 treesize of output 467 [2022-01-10 06:10:31,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 600 treesize of output 596 [2022-01-10 06:10:31,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 596 treesize of output 594 [2022-01-10 06:10:31,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 140 treesize of output 138 [2022-01-10 06:10:31,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 66 treesize of output 64 [2022-01-10 06:10:42,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1403544347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 06:10:42,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:10:42,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2022-01-10 06:10:42,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147742665] [2022-01-10 06:10:42,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:10:42,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 06:10:42,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:10:42,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 06:10:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=814, Unknown=11, NotChecked=0, Total=930 [2022-01-10 06:10:42,961 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 06:10:45,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:10:45,723 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-01-10 06:10:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 06:10:45,723 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2022-01-10 06:10:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:10:45,725 INFO L225 Difference]: With dead ends: 38 [2022-01-10 06:10:45,725 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 06:10:45,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=144, Invalid=1105, Unknown=11, NotChecked=0, Total=1260 [2022-01-10 06:10:45,726 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 06:10:45,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 148 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 47 Unchecked, 0.4s Time] [2022-01-10 06:10:45,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 06:10:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-10 06:10:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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 06:10:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-01-10 06:10:45,731 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 36 [2022-01-10 06:10:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:10:45,731 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-01-10 06:10:45,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-10 06:10:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-01-10 06:10:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 06:10:45,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:10:45,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:10:45,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 06:10:45,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:10:46,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-01-10 06:10:46,144 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:10:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:10:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash 630247085, now seen corresponding path program 2 times [2022-01-10 06:10:46,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:10:46,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117687917] [2022-01-10 06:10:46,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 06:10:46,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:10:46,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:10:46,146 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:10:46,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:10:46,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 06:10:46,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 06:10:46,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 107 conjunts are in the unsatisfiable core [2022-01-10 06:10:46,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:10:46,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-01-10 06:10:46,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-01-10 06:10:46,954 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 11 treesize of output 7 [2022-01-10 06:10:47,211 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-01-10 06:10:47,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 24 [2022-01-10 06:10:47,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:47,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-10 06:10:47,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-10 06:10:47,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-10 06:10:48,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:48,354 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-10 06:10:48,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 16 [2022-01-10 06:10:48,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 06:10:48,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-10 06:10:48,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-10 06:10:48,783 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 13 treesize of output 9 [2022-01-10 06:10:49,830 INFO L353 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-01-10 06:10:49,831 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 35 [2022-01-10 06:10:49,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:49,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 12 [2022-01-10 06:10:49,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-01-10 06:10:50,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:50,668 INFO L353 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-01-10 06:10:50,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 86 [2022-01-10 06:10:50,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:50,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:50,803 INFO L353 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-01-10 06:10:50,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 79 [2022-01-10 06:10:50,902 INFO L353 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2022-01-10 06:10:50,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 36 [2022-01-10 06:10:50,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-01-10 06:10:51,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 44 treesize of output 20 [2022-01-10 06:10:51,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 [2022-01-10 06:10:51,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 3 [2022-01-10 06:10:52,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:52,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:52,616 INFO L353 Elim1Store]: treesize reduction 23, result has 43.9 percent of original size [2022-01-10 06:10:52,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 186 treesize of output 165 [2022-01-10 06:10:52,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 06:10:53,070 INFO L353 Elim1Store]: treesize reduction 29, result has 45.3 percent of original size [2022-01-10 06:10:53,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 195 treesize of output 201 [2022-01-10 06:10:53,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:10:53,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117687917] [2022-01-10 06:10:53,093 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2022-01-10 06:10:53,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-01-10 06:10:53,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:10:53,294 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Should have been eliminated by DER at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:184) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:154) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:142) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:126) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:110) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:95) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:90) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:904) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-01-10 06:10:53,298 INFO L158 Benchmark]: Toolchain (without parser) took 70216.79ms. Allocated memory was 182.5MB in the beginning and 306.2MB in the end (delta: 123.7MB). Free memory was 125.7MB in the beginning and 103.3MB in the end (delta: 22.4MB). Peak memory consumption was 147.1MB. Max. memory is 8.0GB. [2022-01-10 06:10:53,298 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 182.5MB. Free memory is still 143.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 06:10:53,298 INFO L158 Benchmark]: CACSL2BoogieTranslator took 399.11ms. Allocated memory was 182.5MB in the beginning and 254.8MB in the end (delta: 72.4MB). Free memory was 125.4MB in the beginning and 218.1MB in the end (delta: -92.7MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. [2022-01-10 06:10:53,299 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.85ms. Allocated memory is still 254.8MB. Free memory was 218.1MB in the beginning and 216.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 06:10:53,299 INFO L158 Benchmark]: Boogie Preprocessor took 37.96ms. Allocated memory is still 254.8MB. Free memory was 216.0MB in the beginning and 214.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-10 06:10:53,299 INFO L158 Benchmark]: RCFGBuilder took 377.65ms. Allocated memory is still 254.8MB. Free memory was 214.4MB in the beginning and 199.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-01-10 06:10:53,299 INFO L158 Benchmark]: TraceAbstraction took 69333.89ms. Allocated memory was 254.8MB in the beginning and 306.2MB in the end (delta: 51.4MB). Free memory was 199.2MB in the beginning and 103.3MB in the end (delta: 96.0MB). Peak memory consumption was 148.4MB. Max. memory is 8.0GB. [2022-01-10 06:10:53,301 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 182.5MB. Free memory is still 143.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 399.11ms. Allocated memory was 182.5MB in the beginning and 254.8MB in the end (delta: 72.4MB). Free memory was 125.4MB in the beginning and 218.1MB in the end (delta: -92.7MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 58.85ms. Allocated memory is still 254.8MB. Free memory was 218.1MB in the beginning and 216.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.96ms. Allocated memory is still 254.8MB. Free memory was 216.0MB in the beginning and 214.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 377.65ms. Allocated memory is still 254.8MB. Free memory was 214.4MB in the beginning and 199.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 69333.89ms. Allocated memory was 254.8MB in the beginning and 306.2MB in the end (delta: 51.4MB). Free memory was 199.2MB in the beginning and 103.3MB in the end (delta: 96.0MB). Peak memory consumption was 148.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Should have been eliminated by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Should have been eliminated by DER: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:108) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-01-10 06:10:53,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...