/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_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 01:38:14,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 01:38:14,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 01:38:15,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 01:38:15,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 01:38:15,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 01:38:15,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 01:38:15,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 01:38:15,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 01:38:15,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 01:38:15,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 01:38:15,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 01:38:15,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 01:38:15,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 01:38:15,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 01:38:15,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 01:38:15,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 01:38:15,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 01:38:15,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 01:38:15,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 01:38:15,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 01:38:15,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 01:38:15,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 01:38:15,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 01:38:15,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 01:38:15,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 01:38:15,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 01:38:15,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 01:38:15,049 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 01:38:15,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 01:38:15,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 01:38:15,050 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 01:38:15,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 01:38:15,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 01:38:15,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 01:38:15,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 01:38:15,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 01:38:15,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 01:38:15,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 01:38:15,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 01:38:15,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 01:38:15,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-10 01:38:15,079 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 01:38:15,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 01:38:15,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 01:38:15,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 01:38:15,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 01:38:15,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 01:38:15,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 01:38:15,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 01:38:15,081 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 01:38:15,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 01:38:15,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 01:38:15,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 01:38:15,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 01:38:15,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 01:38:15,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 01:38:15,081 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 01:38:15,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 01:38:15,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 01:38:15,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 01:38:15,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 01:38:15,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 01:38:15,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:38:15,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 01:38:15,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 01:38:15,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 01:38:15,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 01:38:15,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 01:38:15,083 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 01:38:15,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 01:38:15,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 01:38:15,083 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 01:38:15,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 01:38:15,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 01:38:15,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 01:38:15,309 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 01:38:15,313 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 01:38:15,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 01:38:15,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/636c17857/8ca2a80c0d4246e7b37acda137224ee0/FLAGb37112b21 [2022-01-10 01:38:15,782 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 01:38:15,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 01:38:15,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/636c17857/8ca2a80c0d4246e7b37acda137224ee0/FLAGb37112b21 [2022-01-10 01:38:15,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/636c17857/8ca2a80c0d4246e7b37acda137224ee0 [2022-01-10 01:38:15,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 01:38:15,822 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 01:38:15,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 01:38:15,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 01:38:15,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 01:38:15,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:38:15" (1/1) ... [2022-01-10 01:38:15,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75c16f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:15, skipping insertion in model container [2022-01-10 01:38:15,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:38:15" (1/1) ... [2022-01-10 01:38:15,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 01:38:15,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 01:38:16,074 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4938,4951] [2022-01-10 01:38:16,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:38:16,103 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 01:38:16,136 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4938,4951] [2022-01-10 01:38:16,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:38:16,183 INFO L208 MainTranslator]: Completed translation [2022-01-10 01:38:16,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:16 WrapperNode [2022-01-10 01:38:16,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 01:38:16,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 01:38:16,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 01:38:16,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 01:38:16,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:16" (1/1) ... [2022-01-10 01:38:16,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:16" (1/1) ... [2022-01-10 01:38:16,235 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 338 [2022-01-10 01:38:16,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 01:38:16,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 01:38:16,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 01:38:16,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 01:38:16,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:16" (1/1) ... [2022-01-10 01:38:16,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:16" (1/1) ... [2022-01-10 01:38:16,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:16" (1/1) ... [2022-01-10 01:38:16,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:16" (1/1) ... [2022-01-10 01:38:16,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:16" (1/1) ... [2022-01-10 01:38:16,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:16" (1/1) ... [2022-01-10 01:38:16,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:16" (1/1) ... [2022-01-10 01:38:16,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 01:38:16,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 01:38:16,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 01:38:16,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 01:38:16,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:16" (1/1) ... [2022-01-10 01:38:16,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:38:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:38:16,308 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 01:38:16,314 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 01:38:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 01:38:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 01:38:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 01:38:16,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 01:38:16,418 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 01:38:16,419 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 01:38:16,705 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 01:38:16,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 01:38:16,710 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 01:38:16,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:38:16 BoogieIcfgContainer [2022-01-10 01:38:16,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 01:38:16,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 01:38:16,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 01:38:16,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 01:38:16,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:38:15" (1/3) ... [2022-01-10 01:38:16,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f7be4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:38:16, skipping insertion in model container [2022-01-10 01:38:16,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:38:16" (2/3) ... [2022-01-10 01:38:16,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f7be4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:38:16, skipping insertion in model container [2022-01-10 01:38:16,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:38:16" (3/3) ... [2022-01-10 01:38:16,718 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-01-10 01:38:16,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 01:38:16,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 01:38:16,750 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 01:38:16,754 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 01:38:16,754 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 01:38:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 80 states have internal predecessors, (135), 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) [2022-01-10 01:38:16,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 01:38:16,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:16,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:16,769 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:16,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:16,772 INFO L85 PathProgramCache]: Analyzing trace with hash 377049112, now seen corresponding path program 1 times [2022-01-10 01:38:16,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:16,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866133685] [2022-01-10 01:38:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:16,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:17,013 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 01:38:17,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:17,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866133685] [2022-01-10 01:38:17,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866133685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:17,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:17,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:38:17,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33417555] [2022-01-10 01:38:17,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:17,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:38:17,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:17,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:38:17,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:38:17,042 INFO L87 Difference]: Start difference. First operand has 81 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 80 states have internal predecessors, (135), 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 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2022-01-10 01:38:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:17,103 INFO L93 Difference]: Finished difference Result 183 states and 292 transitions. [2022-01-10 01:38:17,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:38:17,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 48 [2022-01-10 01:38:17,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:17,112 INFO L225 Difference]: With dead ends: 183 [2022-01-10 01:38:17,112 INFO L226 Difference]: Without dead ends: 122 [2022-01-10 01:38:17,114 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 [2022-01-10 01:38:17,117 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 84 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:17,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 273 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-10 01:38:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-01-10 01:38:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.4705882352941178) internal successors, (175), 119 states have internal predecessors, (175), 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) [2022-01-10 01:38:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 175 transitions. [2022-01-10 01:38:17,161 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 175 transitions. Word has length 48 [2022-01-10 01:38:17,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:17,162 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 175 transitions. [2022-01-10 01:38:17,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2022-01-10 01:38:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 175 transitions. [2022-01-10 01:38:17,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 01:38:17,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:17,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:17,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 01:38:17,165 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:17,167 INFO L85 PathProgramCache]: Analyzing trace with hash 292717965, now seen corresponding path program 1 times [2022-01-10 01:38:17,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:17,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407441715] [2022-01-10 01:38:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:17,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:17,237 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 01:38:17,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:17,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407441715] [2022-01-10 01:38:17,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407441715] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:17,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:17,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:38:17,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676248747] [2022-01-10 01:38:17,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:17,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:38:17,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:17,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:38:17,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:38:17,239 INFO L87 Difference]: Start difference. First operand 120 states and 175 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2022-01-10 01:38:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:17,269 INFO L93 Difference]: Finished difference Result 292 states and 447 transitions. [2022-01-10 01:38:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:38:17,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 49 [2022-01-10 01:38:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:17,274 INFO L225 Difference]: With dead ends: 292 [2022-01-10 01:38:17,274 INFO L226 Difference]: Without dead ends: 198 [2022-01-10 01:38:17,275 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 [2022-01-10 01:38:17,276 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 62 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:17,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 231 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-10 01:38:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2022-01-10 01:38:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.5128205128205128) internal successors, (295), 195 states have internal predecessors, (295), 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) [2022-01-10 01:38:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 295 transitions. [2022-01-10 01:38:17,295 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 295 transitions. Word has length 49 [2022-01-10 01:38:17,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:17,295 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 295 transitions. [2022-01-10 01:38:17,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2022-01-10 01:38:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 295 transitions. [2022-01-10 01:38:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 01:38:17,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:17,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:17,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 01:38:17,297 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:17,297 INFO L85 PathProgramCache]: Analyzing trace with hash -875864605, now seen corresponding path program 1 times [2022-01-10 01:38:17,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:17,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988694615] [2022-01-10 01:38:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:17,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:17,340 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 01:38:17,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:17,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988694615] [2022-01-10 01:38:17,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988694615] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:17,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:17,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:38:17,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116344517] [2022-01-10 01:38:17,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:17,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:38:17,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:38:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:38:17,342 INFO L87 Difference]: Start difference. First operand 196 states and 295 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-01-10 01:38:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:17,386 INFO L93 Difference]: Finished difference Result 504 states and 781 transitions. [2022-01-10 01:38:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:38:17,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 50 [2022-01-10 01:38:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:17,388 INFO L225 Difference]: With dead ends: 504 [2022-01-10 01:38:17,388 INFO L226 Difference]: Without dead ends: 334 [2022-01-10 01:38:17,389 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 [2022-01-10 01:38:17,390 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 57 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:17,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 227 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-10 01:38:17,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2022-01-10 01:38:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.5317220543806647) internal successors, (507), 331 states have internal predecessors, (507), 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) [2022-01-10 01:38:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 507 transitions. [2022-01-10 01:38:17,407 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 507 transitions. Word has length 50 [2022-01-10 01:38:17,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:17,407 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 507 transitions. [2022-01-10 01:38:17,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2022-01-10 01:38:17,408 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 507 transitions. [2022-01-10 01:38:17,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 01:38:17,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:17,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:17,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 01:38:17,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:17,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1524907140, now seen corresponding path program 1 times [2022-01-10 01:38:17,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:17,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019278608] [2022-01-10 01:38:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:17,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:17,479 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 01:38:17,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:17,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019278608] [2022-01-10 01:38:17,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019278608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:17,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:17,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:38:17,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686567287] [2022-01-10 01:38:17,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:17,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:38:17,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:17,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:38:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:38:17,481 INFO L87 Difference]: Start difference. First operand 332 states and 507 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2022-01-10 01:38:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:17,738 INFO L93 Difference]: Finished difference Result 2780 states and 4355 transitions. [2022-01-10 01:38:17,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 01:38:17,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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 51 [2022-01-10 01:38:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:17,749 INFO L225 Difference]: With dead ends: 2780 [2022-01-10 01:38:17,749 INFO L226 Difference]: Without dead ends: 2474 [2022-01-10 01:38:17,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-10 01:38:17,760 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 697 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:17,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 1115 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:38:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-01-10 01:38:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 636. [2022-01-10 01:38:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.5291338582677165) internal successors, (971), 635 states have internal predecessors, (971), 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) [2022-01-10 01:38:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 971 transitions. [2022-01-10 01:38:17,831 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 971 transitions. Word has length 51 [2022-01-10 01:38:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:17,831 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 971 transitions. [2022-01-10 01:38:17,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2022-01-10 01:38:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 971 transitions. [2022-01-10 01:38:17,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 01:38:17,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:17,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:17,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 01:38:17,835 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:17,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:17,835 INFO L85 PathProgramCache]: Analyzing trace with hash -48905761, now seen corresponding path program 1 times [2022-01-10 01:38:17,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:17,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125305253] [2022-01-10 01:38:17,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:17,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:17,999 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 01:38:17,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:17,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125305253] [2022-01-10 01:38:17,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125305253] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:17,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:18,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:38:18,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286306555] [2022-01-10 01:38:18,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:18,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:38:18,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:18,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:38:18,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:38:18,001 INFO L87 Difference]: Start difference. First operand 636 states and 971 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2022-01-10 01:38:18,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:18,177 INFO L93 Difference]: Finished difference Result 1248 states and 1917 transitions. [2022-01-10 01:38:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:38:18,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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 53 [2022-01-10 01:38:18,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:18,180 INFO L225 Difference]: With dead ends: 1248 [2022-01-10 01:38:18,180 INFO L226 Difference]: Without dead ends: 638 [2022-01-10 01:38:18,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 01:38:18,181 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 215 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:18,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 342 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-01-10 01:38:18,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 636. [2022-01-10 01:38:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.5165354330708662) internal successors, (963), 635 states have internal predecessors, (963), 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) [2022-01-10 01:38:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 963 transitions. [2022-01-10 01:38:18,224 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 963 transitions. Word has length 53 [2022-01-10 01:38:18,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:18,224 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 963 transitions. [2022-01-10 01:38:18,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 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) [2022-01-10 01:38:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 963 transitions. [2022-01-10 01:38:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 01:38:18,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:18,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:18,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 01:38:18,225 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:18,226 INFO L85 PathProgramCache]: Analyzing trace with hash -69908416, now seen corresponding path program 1 times [2022-01-10 01:38:18,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:18,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3497947] [2022-01-10 01:38:18,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:18,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:18,259 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 01:38:18,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:18,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3497947] [2022-01-10 01:38:18,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3497947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:18,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:18,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:38:18,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651882561] [2022-01-10 01:38:18,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:18,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:38:18,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:38:18,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:38:18,261 INFO L87 Difference]: Start difference. First operand 636 states and 963 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2022-01-10 01:38:18,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:18,443 INFO L93 Difference]: Finished difference Result 1768 states and 2685 transitions. [2022-01-10 01:38:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:38:18,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2022-01-10 01:38:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:18,463 INFO L225 Difference]: With dead ends: 1768 [2022-01-10 01:38:18,463 INFO L226 Difference]: Without dead ends: 1158 [2022-01-10 01:38:18,464 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 [2022-01-10 01:38:18,465 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 47 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:18,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 181 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-01-10 01:38:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1140. [2022-01-10 01:38:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.4846356453028973) internal successors, (1691), 1139 states have internal predecessors, (1691), 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) [2022-01-10 01:38:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1691 transitions. [2022-01-10 01:38:18,578 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1691 transitions. Word has length 53 [2022-01-10 01:38:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:18,578 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 1691 transitions. [2022-01-10 01:38:18,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2022-01-10 01:38:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1691 transitions. [2022-01-10 01:38:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 01:38:18,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:18,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:18,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 01:38:18,579 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1517987980, now seen corresponding path program 1 times [2022-01-10 01:38:18,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:18,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566548240] [2022-01-10 01:38:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:18,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:18,646 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 01:38:18,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:18,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566548240] [2022-01-10 01:38:18,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566548240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:18,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:18,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:38:18,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251127598] [2022-01-10 01:38:18,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:18,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:38:18,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:18,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:38:18,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:38:18,648 INFO L87 Difference]: Start difference. First operand 1140 states and 1691 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2022-01-10 01:38:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:18,815 INFO L93 Difference]: Finished difference Result 2254 states and 3356 transitions. [2022-01-10 01:38:18,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:38:18,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2022-01-10 01:38:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:18,819 INFO L225 Difference]: With dead ends: 2254 [2022-01-10 01:38:18,819 INFO L226 Difference]: Without dead ends: 1140 [2022-01-10 01:38:18,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:38:18,822 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 243 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:18,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 94 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-10 01:38:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1140. [2022-01-10 01:38:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.4705882352941178) internal successors, (1675), 1139 states have internal predecessors, (1675), 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) [2022-01-10 01:38:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1675 transitions. [2022-01-10 01:38:18,912 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1675 transitions. Word has length 54 [2022-01-10 01:38:18,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:18,912 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 1675 transitions. [2022-01-10 01:38:18,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2022-01-10 01:38:18,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1675 transitions. [2022-01-10 01:38:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 01:38:18,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:18,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:18,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 01:38:18,914 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2047278481, now seen corresponding path program 1 times [2022-01-10 01:38:18,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:18,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852272952] [2022-01-10 01:38:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:18,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:18,975 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 01:38:18,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:18,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852272952] [2022-01-10 01:38:18,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852272952] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:18,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:18,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:38:18,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65538513] [2022-01-10 01:38:18,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:18,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:38:18,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:38:18,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:38:18,977 INFO L87 Difference]: Start difference. First operand 1140 states and 1675 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2022-01-10 01:38:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:19,124 INFO L93 Difference]: Finished difference Result 2254 states and 3324 transitions. [2022-01-10 01:38:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:38:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2022-01-10 01:38:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:19,128 INFO L225 Difference]: With dead ends: 2254 [2022-01-10 01:38:19,128 INFO L226 Difference]: Without dead ends: 1140 [2022-01-10 01:38:19,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:38:19,130 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 266 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:19,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 78 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:19,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-10 01:38:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1140. [2022-01-10 01:38:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.456540825285338) internal successors, (1659), 1139 states have internal predecessors, (1659), 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) [2022-01-10 01:38:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1659 transitions. [2022-01-10 01:38:19,210 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1659 transitions. Word has length 54 [2022-01-10 01:38:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:19,210 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 1659 transitions. [2022-01-10 01:38:19,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2022-01-10 01:38:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1659 transitions. [2022-01-10 01:38:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 01:38:19,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:19,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:19,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 01:38:19,211 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:19,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1919193174, now seen corresponding path program 1 times [2022-01-10 01:38:19,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:19,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138029445] [2022-01-10 01:38:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:19,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:19,251 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 01:38:19,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:19,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138029445] [2022-01-10 01:38:19,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138029445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:19,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:19,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:38:19,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711963726] [2022-01-10 01:38:19,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:19,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:38:19,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:19,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:38:19,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:38:19,253 INFO L87 Difference]: Start difference. First operand 1140 states and 1659 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2022-01-10 01:38:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:19,395 INFO L93 Difference]: Finished difference Result 2254 states and 3292 transitions. [2022-01-10 01:38:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:38:19,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2022-01-10 01:38:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:19,399 INFO L225 Difference]: With dead ends: 2254 [2022-01-10 01:38:19,399 INFO L226 Difference]: Without dead ends: 1140 [2022-01-10 01:38:19,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:38:19,400 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 250 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:19,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 86 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-10 01:38:19,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1140. [2022-01-10 01:38:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.4424934152765583) internal successors, (1643), 1139 states have internal predecessors, (1643), 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) [2022-01-10 01:38:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1643 transitions. [2022-01-10 01:38:19,506 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1643 transitions. Word has length 54 [2022-01-10 01:38:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:19,506 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 1643 transitions. [2022-01-10 01:38:19,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2022-01-10 01:38:19,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1643 transitions. [2022-01-10 01:38:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 01:38:19,507 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:19,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:19,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 01:38:19,507 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:19,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:19,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1053660785, now seen corresponding path program 1 times [2022-01-10 01:38:19,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:19,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268294118] [2022-01-10 01:38:19,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:19,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:19,551 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 01:38:19,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:19,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268294118] [2022-01-10 01:38:19,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268294118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:19,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:19,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:38:19,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881879199] [2022-01-10 01:38:19,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:19,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:38:19,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:38:19,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:38:19,552 INFO L87 Difference]: Start difference. First operand 1140 states and 1643 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2022-01-10 01:38:19,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:19,730 INFO L93 Difference]: Finished difference Result 1929 states and 2780 transitions. [2022-01-10 01:38:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:38:19,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 54 [2022-01-10 01:38:19,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:19,736 INFO L225 Difference]: With dead ends: 1929 [2022-01-10 01:38:19,736 INFO L226 Difference]: Without dead ends: 1927 [2022-01-10 01:38:19,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:38:19,737 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 142 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:19,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 507 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2022-01-10 01:38:19,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1172. [2022-01-10 01:38:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 1.4235695986336465) internal successors, (1667), 1171 states have internal predecessors, (1667), 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) [2022-01-10 01:38:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1667 transitions. [2022-01-10 01:38:19,859 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1667 transitions. Word has length 54 [2022-01-10 01:38:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:19,859 INFO L470 AbstractCegarLoop]: Abstraction has 1172 states and 1667 transitions. [2022-01-10 01:38:19,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2022-01-10 01:38:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1667 transitions. [2022-01-10 01:38:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 01:38:19,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:19,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:19,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 01:38:19,860 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:19,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:19,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1226019551, now seen corresponding path program 1 times [2022-01-10 01:38:19,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:19,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227987506] [2022-01-10 01:38:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:19,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:19,880 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 01:38:19,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:19,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227987506] [2022-01-10 01:38:19,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227987506] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:19,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:19,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:38:19,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649107639] [2022-01-10 01:38:19,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:19,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:38:19,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:19,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:38:19,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:38:19,882 INFO L87 Difference]: Start difference. First operand 1172 states and 1667 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-01-10 01:38:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:20,038 INFO L93 Difference]: Finished difference Result 2299 states and 3305 transitions. [2022-01-10 01:38:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:38:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2022-01-10 01:38:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:20,043 INFO L225 Difference]: With dead ends: 2299 [2022-01-10 01:38:20,043 INFO L226 Difference]: Without dead ends: 1656 [2022-01-10 01:38:20,044 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 [2022-01-10 01:38:20,044 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 66 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:20,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 234 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2022-01-10 01:38:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1654. [2022-01-10 01:38:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 1.4162129461584998) internal successors, (2341), 1653 states have internal predecessors, (2341), 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) [2022-01-10 01:38:20,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 2341 transitions. [2022-01-10 01:38:20,186 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 2341 transitions. Word has length 54 [2022-01-10 01:38:20,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:20,186 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 2341 transitions. [2022-01-10 01:38:20,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-01-10 01:38:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 2341 transitions. [2022-01-10 01:38:20,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 01:38:20,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:20,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:20,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 01:38:20,188 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:20,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:20,188 INFO L85 PathProgramCache]: Analyzing trace with hash 595199301, now seen corresponding path program 1 times [2022-01-10 01:38:20,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:20,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489820017] [2022-01-10 01:38:20,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:20,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 01:38:20,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:20,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489820017] [2022-01-10 01:38:20,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489820017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:20,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:20,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:38:20,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875238014] [2022-01-10 01:38:20,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:20,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:38:20,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:20,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:38:20,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:38:20,233 INFO L87 Difference]: Start difference. First operand 1654 states and 2341 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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) [2022-01-10 01:38:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:20,899 INFO L93 Difference]: Finished difference Result 8472 states and 12022 transitions. [2022-01-10 01:38:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:38:20,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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 77 [2022-01-10 01:38:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:20,919 INFO L225 Difference]: With dead ends: 8472 [2022-01-10 01:38:20,919 INFO L226 Difference]: Without dead ends: 6846 [2022-01-10 01:38:20,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-10 01:38:20,923 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 486 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:20,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 563 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2022-01-10 01:38:21,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 3278. [2022-01-10 01:38:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 1.4125724748245347) internal successors, (4629), 3277 states have internal predecessors, (4629), 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) [2022-01-10 01:38:21,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 4629 transitions. [2022-01-10 01:38:21,272 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 4629 transitions. Word has length 77 [2022-01-10 01:38:21,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:21,272 INFO L470 AbstractCegarLoop]: Abstraction has 3278 states and 4629 transitions. [2022-01-10 01:38:21,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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) [2022-01-10 01:38:21,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 4629 transitions. [2022-01-10 01:38:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 01:38:21,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:21,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:21,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 01:38:21,274 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:21,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:21,274 INFO L85 PathProgramCache]: Analyzing trace with hash -558746805, now seen corresponding path program 1 times [2022-01-10 01:38:21,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:21,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097743578] [2022-01-10 01:38:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:21,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 01:38:21,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:21,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097743578] [2022-01-10 01:38:21,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097743578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:21,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:21,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:38:21,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131087637] [2022-01-10 01:38:21,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:21,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:38:21,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:21,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:38:21,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:38:21,318 INFO L87 Difference]: Start difference. First operand 3278 states and 4629 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2022-01-10 01:38:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:22,131 INFO L93 Difference]: Finished difference Result 10096 states and 14310 transitions. [2022-01-10 01:38:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:38:22,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 77 [2022-01-10 01:38:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:22,158 INFO L225 Difference]: With dead ends: 10096 [2022-01-10 01:38:22,159 INFO L226 Difference]: Without dead ends: 8470 [2022-01-10 01:38:22,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-10 01:38:22,164 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 473 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:22,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 577 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:22,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8470 states. [2022-01-10 01:38:22,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8470 to 5718. [2022-01-10 01:38:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 1.4065069092181215) internal successors, (8041), 5717 states have internal predecessors, (8041), 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) [2022-01-10 01:38:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 8041 transitions. [2022-01-10 01:38:22,745 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 8041 transitions. Word has length 77 [2022-01-10 01:38:22,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:22,745 INFO L470 AbstractCegarLoop]: Abstraction has 5718 states and 8041 transitions. [2022-01-10 01:38:22,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2022-01-10 01:38:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 8041 transitions. [2022-01-10 01:38:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 01:38:22,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:22,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:22,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 01:38:22,747 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:22,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:22,747 INFO L85 PathProgramCache]: Analyzing trace with hash -262701377, now seen corresponding path program 1 times [2022-01-10 01:38:22,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:22,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316463756] [2022-01-10 01:38:22,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:22,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 01:38:22,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:22,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316463756] [2022-01-10 01:38:22,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316463756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:22,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:22,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:38:22,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594505477] [2022-01-10 01:38:22,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:22,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:38:22,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:38:22,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:38:22,789 INFO L87 Difference]: Start difference. First operand 5718 states and 8041 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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) [2022-01-10 01:38:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:23,684 INFO L93 Difference]: Finished difference Result 11720 states and 16598 transitions. [2022-01-10 01:38:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:38:23,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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 77 [2022-01-10 01:38:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:23,704 INFO L225 Difference]: With dead ends: 11720 [2022-01-10 01:38:23,704 INFO L226 Difference]: Without dead ends: 10094 [2022-01-10 01:38:23,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-10 01:38:23,709 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 438 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:23,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 663 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10094 states. [2022-01-10 01:38:24,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10094 to 7342. [2022-01-10 01:38:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7342 states, 7341 states have (on average 1.4070290151205558) internal successors, (10329), 7341 states have internal predecessors, (10329), 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) [2022-01-10 01:38:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7342 states to 7342 states and 10329 transitions. [2022-01-10 01:38:24,569 INFO L78 Accepts]: Start accepts. Automaton has 7342 states and 10329 transitions. Word has length 77 [2022-01-10 01:38:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:24,569 INFO L470 AbstractCegarLoop]: Abstraction has 7342 states and 10329 transitions. [2022-01-10 01:38:24,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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) [2022-01-10 01:38:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 7342 states and 10329 transitions. [2022-01-10 01:38:24,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 01:38:24,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:24,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:24,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 01:38:24,572 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:24,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:24,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2055185859, now seen corresponding path program 1 times [2022-01-10 01:38:24,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:24,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192413546] [2022-01-10 01:38:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:24,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:38:24,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:24,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192413546] [2022-01-10 01:38:24,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192413546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:24,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:24,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:38:24,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553616096] [2022-01-10 01:38:24,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:24,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:38:24,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:24,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:38:24,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:38:24,640 INFO L87 Difference]: Start difference. First operand 7342 states and 10329 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2022-01-10 01:38:25,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:25,692 INFO L93 Difference]: Finished difference Result 12336 states and 17494 transitions. [2022-01-10 01:38:25,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:38:25,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 78 [2022-01-10 01:38:25,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:25,714 INFO L225 Difference]: With dead ends: 12336 [2022-01-10 01:38:25,714 INFO L226 Difference]: Without dead ends: 11214 [2022-01-10 01:38:25,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-10 01:38:25,720 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 435 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:25,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 586 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11214 states. [2022-01-10 01:38:26,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11214 to 8462. [2022-01-10 01:38:26,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8462 states, 8461 states have (on average 1.4098806287672851) internal successors, (11929), 8461 states have internal predecessors, (11929), 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) [2022-01-10 01:38:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8462 states to 8462 states and 11929 transitions. [2022-01-10 01:38:26,576 INFO L78 Accepts]: Start accepts. Automaton has 8462 states and 11929 transitions. Word has length 78 [2022-01-10 01:38:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:26,576 INFO L470 AbstractCegarLoop]: Abstraction has 8462 states and 11929 transitions. [2022-01-10 01:38:26,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2022-01-10 01:38:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 8462 states and 11929 transitions. [2022-01-10 01:38:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 01:38:26,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:26,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:26,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 01:38:26,579 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash -144941472, now seen corresponding path program 1 times [2022-01-10 01:38:26,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:26,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078677461] [2022-01-10 01:38:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:26,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:38:26,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:26,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078677461] [2022-01-10 01:38:26,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078677461] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:38:26,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:38:26,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:38:26,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044064778] [2022-01-10 01:38:26,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:38:26,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:38:26,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:38:26,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:38:26,607 INFO L87 Difference]: Start difference. First operand 8462 states and 11929 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2022-01-10 01:38:27,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:27,415 INFO L93 Difference]: Finished difference Result 14658 states and 20769 transitions. [2022-01-10 01:38:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:38:27,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2022-01-10 01:38:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:27,426 INFO L225 Difference]: With dead ends: 14658 [2022-01-10 01:38:27,426 INFO L226 Difference]: Without dead ends: 6224 [2022-01-10 01:38:27,436 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 [2022-01-10 01:38:27,436 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 48 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:27,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 226 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:38:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6224 states. [2022-01-10 01:38:28,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6224 to 6222. [2022-01-10 01:38:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6222 states, 6221 states have (on average 1.4110271660504743) internal successors, (8778), 6221 states have internal predecessors, (8778), 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) [2022-01-10 01:38:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 8778 transitions. [2022-01-10 01:38:28,072 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 8778 transitions. Word has length 79 [2022-01-10 01:38:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:28,073 INFO L470 AbstractCegarLoop]: Abstraction has 6222 states and 8778 transitions. [2022-01-10 01:38:28,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2022-01-10 01:38:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 8778 transitions. [2022-01-10 01:38:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 01:38:28,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:28,074 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:28,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 01:38:28,074 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:28,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:28,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1559581035, now seen corresponding path program 1 times [2022-01-10 01:38:28,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:28,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336031287] [2022-01-10 01:38:28,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:28,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:38:28,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:28,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336031287] [2022-01-10 01:38:28,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336031287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:38:28,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773595916] [2022-01-10 01:38:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:28,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:38:28,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:38:28,259 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) [2022-01-10 01:38:28,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 01:38:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:28,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 01:38:28,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:38:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:38:28,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:38:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:38:28,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773595916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:38:28,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:38:28,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2022-01-10 01:38:28,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580051668] [2022-01-10 01:38:28,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:38:28,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 01:38:28,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:38:28,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 01:38:28,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-10 01:38:28,903 INFO L87 Difference]: Start difference. First operand 6222 states and 8778 transitions. Second operand has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 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) [2022-01-10 01:38:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:38:50,875 INFO L93 Difference]: Finished difference Result 114899 states and 157659 transitions. [2022-01-10 01:38:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-01-10 01:38:50,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 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 79 [2022-01-10 01:38:50,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:38:51,167 INFO L225 Difference]: With dead ends: 114899 [2022-01-10 01:38:51,167 INFO L226 Difference]: Without dead ends: 108737 [2022-01-10 01:38:51,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20884 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=6456, Invalid=39126, Unknown=0, NotChecked=0, Total=45582 [2022-01-10 01:38:51,225 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 7684 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7684 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 01:38:51,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7684 Valid, 1453 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 01:38:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108737 states. [2022-01-10 01:38:58,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108737 to 46580. [2022-01-10 01:38:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46580 states, 46579 states have (on average 1.3533566628738272) internal successors, (63038), 46579 states have internal predecessors, (63038), 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) [2022-01-10 01:38:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46580 states to 46580 states and 63038 transitions. [2022-01-10 01:38:58,803 INFO L78 Accepts]: Start accepts. Automaton has 46580 states and 63038 transitions. Word has length 79 [2022-01-10 01:38:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:38:58,803 INFO L470 AbstractCegarLoop]: Abstraction has 46580 states and 63038 transitions. [2022-01-10 01:38:58,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 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) [2022-01-10 01:38:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 46580 states and 63038 transitions. [2022-01-10 01:38:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 01:38:58,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:38:58,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:38:58,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 01:38:59,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-10 01:38:59,006 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:38:59,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:38:59,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1183040057, now seen corresponding path program 1 times [2022-01-10 01:38:59,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:38:59,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695647657] [2022-01-10 01:38:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:59,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:38:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:38:59,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:38:59,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695647657] [2022-01-10 01:38:59,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695647657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:38:59,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773066358] [2022-01-10 01:38:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:38:59,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:38:59,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:38:59,180 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) [2022-01-10 01:38:59,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 01:38:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:38:59,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 01:38:59,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:38:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:38:59,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:39:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:39:00,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773066358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 01:39:00,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 01:39:00,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-01-10 01:39:00,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845159511] [2022-01-10 01:39:00,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 01:39:00,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 01:39:00,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:39:00,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 01:39:00,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-10 01:39:00,439 INFO L87 Difference]: Start difference. First operand 46580 states and 63038 transitions. Second operand has 21 states, 21 states have (on average 8.238095238095237) internal successors, (173), 20 states have internal predecessors, (173), 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)