/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 02:09:38,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 02:09:38,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 02:09:38,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-11 02:09:38,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 02:09:38,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 02:09:38,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 02:09:38,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 02:09:38,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 02:09:38,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 02:09:38,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 02:09:38,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 02:09:38,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 02:09:38,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 02:09:38,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 02:09:38,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 02:09:38,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 02:09:38,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 02:09:38,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 02:09:38,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 02:09:38,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 02:09:38,837 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 02:09:38,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 02:09:38,838 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 02:09:38,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 02:09:38,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 02:09:38,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 02:09:38,839 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 02:09:38,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 02:09:38,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 02:09:38,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 02:09:38,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 02:09:38,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 02:09:38,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 02:09:38,839 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 02:09:38,839 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 02:09:38,840 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 02:09:38,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 02:09:38,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 02:09:38,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 02:09:38,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 02:09:38,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 02:09:38,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:09:38,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 02:09:38,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 02:09:38,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 02:09:38,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 02:09:38,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 02:09:38,841 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 02:09:38,841 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 02:09:38,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 02:09:38,841 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 02:09:38,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 02:09:38,841 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 02:09:38,841 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 02:09:39,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 02:09:39,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 02:09:39,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 02:09:39,056 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 02:09:39,056 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 02:09:39,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2022-01-11 02:09:39,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25994557c/40469b149df240dc9e809a5a0b23dad6/FLAGbe6cef25e [2022-01-11 02:09:39,453 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 02:09:39,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2022-01-11 02:09:39,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25994557c/40469b149df240dc9e809a5a0b23dad6/FLAGbe6cef25e [2022-01-11 02:09:39,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25994557c/40469b149df240dc9e809a5a0b23dad6 [2022-01-11 02:09:39,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 02:09:39,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 02:09:39,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 02:09:39,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 02:09:39,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 02:09:39,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4306385e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39, skipping insertion in model container [2022-01-11 02:09:39,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 02:09:39,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 02:09:39,610 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c[318,331] [2022-01-11 02:09:39,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:09:39,629 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 02:09:39,638 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c[318,331] [2022-01-11 02:09:39,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:09:39,651 INFO L208 MainTranslator]: Completed translation [2022-01-11 02:09:39,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39 WrapperNode [2022-01-11 02:09:39,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 02:09:39,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 02:09:39,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 02:09:39,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 02:09:39,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,673 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-01-11 02:09:39,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 02:09:39,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 02:09:39,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 02:09:39,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 02:09:39,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,689 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 02:09:39,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 02:09:39,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 02:09:39,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 02:09:39,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:09:39,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:09:39,724 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) [2022-01-11 02:09:39,743 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 [2022-01-11 02:09:39,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 02:09:39,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 02:09:39,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 02:09:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 02:09:39,792 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 02:09:39,793 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 02:09:39,885 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 02:09:39,889 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 02:09:39,889 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-11 02:09:39,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:09:39 BoogieIcfgContainer [2022-01-11 02:09:39,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 02:09:39,891 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 02:09:39,891 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 02:09:39,896 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 02:09:39,898 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:09:39" (1/1) ... [2022-01-11 02:09:39,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:09:39 BasicIcfg [2022-01-11 02:09:39,962 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 02:09:39,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 02:09:39,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 02:09:39,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 02:09:39,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:09:39" (1/4) ... [2022-01-11 02:09:39,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf93cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:09:39, skipping insertion in model container [2022-01-11 02:09:39,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:09:39" (2/4) ... [2022-01-11 02:09:39,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf93cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:09:39, skipping insertion in model container [2022-01-11 02:09:39,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:09:39" (3/4) ... [2022-01-11 02:09:39,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bf93cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:09:39, skipping insertion in model container [2022-01-11 02:09:39,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:09:39" (4/4) ... [2022-01-11 02:09:39,967 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.cTransformedIcfg [2022-01-11 02:09:39,970 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 02:09:39,971 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 02:09:40,026 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 02:09:40,031 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 [2022-01-11 02:09:40,031 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 02:09:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-11 02:09:40,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:09:40,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-11 02:09:40,046 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:09:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:09:40,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1953496264, now seen corresponding path program 1 times [2022-01-11 02:09:40,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:09:40,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667895844] [2022-01-11 02:09:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:09:40,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:09:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:09:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:09:40,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:09:40,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667895844] [2022-01-11 02:09:40,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667895844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:09:40,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:09:40,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 02:09:40,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363039956] [2022-01-11 02:09:40,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:09:40,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 02:09:40,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:09:40,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 02:09:40,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:09:40,210 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:40,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:09:40,220 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-01-11 02:09:40,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 02:09:40,221 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-01-11 02:09:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:09:40,226 INFO L225 Difference]: With dead ends: 21 [2022-01-11 02:09:40,227 INFO L226 Difference]: Without dead ends: 9 [2022-01-11 02:09:40,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 02:09:40,232 INFO L933 BasicCegarLoop]: 14 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, 14 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 [2022-01-11 02:09:40,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:09:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-01-11 02:09:40,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-01-11 02:09:40,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-01-11 02:09:40,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-01-11 02:09:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:09:40,258 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-01-11 02:09:40,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-01-11 02:09:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-11 02:09:40,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:09:40,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-11 02:09:40,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 02:09:40,260 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:09:40,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:09:40,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1953526055, now seen corresponding path program 1 times [2022-01-11 02:09:40,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:09:40,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517346347] [2022-01-11 02:09:40,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:09:40,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:09:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:09:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:09:40,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:09:40,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517346347] [2022-01-11 02:09:40,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517346347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:09:40,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:09:40,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-11 02:09:40,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200942284] [2022-01-11 02:09:40,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:09:40,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 02:09:40,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:09:40,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 02:09:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:09:40,341 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:40,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:09:40,365 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-01-11 02:09:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 02:09:40,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-01-11 02:09:40,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:09:40,366 INFO L225 Difference]: With dead ends: 19 [2022-01-11 02:09:40,366 INFO L226 Difference]: Without dead ends: 12 [2022-01-11 02:09:40,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 02:09:40,368 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:09:40,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:09:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-11 02:09:40,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-01-11 02:09:40,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-01-11 02:09:40,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-01-11 02:09:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:09:40,371 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-01-11 02:09:40,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-01-11 02:09:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-11 02:09:40,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:09:40,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:09:40,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 02:09:40,372 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:09:40,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:09:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1634255214, now seen corresponding path program 1 times [2022-01-11 02:09:40,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:09:40,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258515529] [2022-01-11 02:09:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:09:40,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:09:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:09:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:09:40,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:09:40,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258515529] [2022-01-11 02:09:40,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258515529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:09:40,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619677915] [2022-01-11 02:09:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:09:40,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:09:40,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:09:40,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:09:40,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 02:09:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:09:40,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-11 02:09:40,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:09:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:09:40,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:09:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:09:40,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619677915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:09:40,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:09:40,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-11 02:09:40,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205414785] [2022-01-11 02:09:40,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:09:40,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 02:09:40,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:09:40,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 02:09:40,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-11 02:09:40,671 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:09:40,713 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-01-11 02:09:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 02:09:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-11 02:09:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:09:40,713 INFO L225 Difference]: With dead ends: 26 [2022-01-11 02:09:40,714 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 02:09:40,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-11 02:09:40,715 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:09:40,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 14 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:09:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 02:09:40,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-11 02:09:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-11 02:09:40,718 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2022-01-11 02:09:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:09:40,718 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-11 02:09:40,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-11 02:09:40,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-11 02:09:40,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:09:40,719 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2022-01-11 02:09:40,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 02:09:40,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:09:40,934 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:09:40,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:09:40,934 INFO L85 PathProgramCache]: Analyzing trace with hash 252460743, now seen corresponding path program 1 times [2022-01-11 02:09:40,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:09:40,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892958966] [2022-01-11 02:09:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:09:40,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:09:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:09:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 02:09:41,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:09:41,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892958966] [2022-01-11 02:09:41,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892958966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:09:41,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191927104] [2022-01-11 02:09:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:09:41,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:09:41,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:09:41,006 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:09:41,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 02:09:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:09:41,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-11 02:09:41,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:09:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 02:09:41,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:09:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 02:09:41,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191927104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:09:41,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:09:41,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-11 02:09:41,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897892513] [2022-01-11 02:09:41,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:09:41,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-11 02:09:41,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:09:41,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-11 02:09:41,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-11 02:09:41,174 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:09:41,254 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-01-11 02:09:41,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 02:09:41,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-11 02:09:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:09:41,257 INFO L225 Difference]: With dead ends: 44 [2022-01-11 02:09:41,257 INFO L226 Difference]: Without dead ends: 35 [2022-01-11 02:09:41,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-01-11 02:09:41,261 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:09:41,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 29 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:09:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-11 02:09:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2022-01-11 02:09:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-01-11 02:09:41,269 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-01-11 02:09:41,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:09:41,269 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-01-11 02:09:41,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-01-11 02:09:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-11 02:09:41,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:09:41,272 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-01-11 02:09:41,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 02:09:41,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-11 02:09:41,491 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:09:41,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:09:41,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1526364569, now seen corresponding path program 2 times [2022-01-11 02:09:41,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:09:41,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630778440] [2022-01-11 02:09:41,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:09:41,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:09:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:09:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:09:41,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:09:41,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630778440] [2022-01-11 02:09:41,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630778440] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:09:41,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855507651] [2022-01-11 02:09:41,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:09:41,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:09:41,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:09:41,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:09:41,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 02:09:41,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 02:09:41,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:09:41,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-11 02:09:41,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:09:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 02:09:41,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 02:09:41,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855507651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:09:41,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 02:09:41,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-01-11 02:09:41,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598227036] [2022-01-11 02:09:41,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:09:41,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 02:09:41,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:09:41,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 02:09:41,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-11 02:09:41,765 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:09:41,809 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-01-11 02:09:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 02:09:41,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-11 02:09:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:09:41,811 INFO L225 Difference]: With dead ends: 35 [2022-01-11 02:09:41,811 INFO L226 Difference]: Without dead ends: 31 [2022-01-11 02:09:41,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-11 02:09:41,812 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:09:41,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 13 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:09:41,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-11 02:09:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-01-11 02:09:41,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-01-11 02:09:41,822 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 18 [2022-01-11 02:09:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:09:41,823 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-01-11 02:09:41,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:09:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-01-11 02:09:41,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-11 02:09:41,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:09:41,824 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:09:41,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 02:09:42,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:09:42,041 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:09:42,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:09:42,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2059439889, now seen corresponding path program 2 times [2022-01-11 02:09:42,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:09:42,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547587529] [2022-01-11 02:09:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:09:42,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:09:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:09:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-11 02:09:42,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:09:42,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547587529] [2022-01-11 02:09:42,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547587529] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:09:42,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823203386] [2022-01-11 02:09:42,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:09:42,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:09:42,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:09:42,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 02:09:42,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 02:09:42,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 02:09:42,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:09:42,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-11 02:09:42,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:09:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-11 02:09:42,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:10:38,467 WARN L228 SmtUtils]: Spent 52.70s on a formula simplification. DAG size of input: 7672 DAG size of output: 4004 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)