/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:50:17,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:50:17,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:50:17,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:50:17,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:50:17,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:50:17,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:50:17,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:50:17,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:50:17,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:50:17,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:50:17,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:50:17,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:50:17,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:50:17,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:50:17,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:50:17,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:50:17,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:50:17,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:50:17,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:50:17,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 21:50:17,551 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:50:17,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:50:17,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:50:17,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:50:17,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:50:17,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:50:17,553 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:50:17,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:50:17,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:50:17,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:50:17,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:50:17,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:50:17,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:50:17,554 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:50:17,554 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:50:17,554 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:50:17,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:50:17,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:50:17,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:50:17,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:50:17,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:50:17,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:50:17,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:50:17,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:50:17,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:50:17,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:50:17,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:50:17,556 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:50:17,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:50:17,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:50:17,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:50:17,556 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:50:17,557 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:50:17,557 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:50:17,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:50:17,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:50:17,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:50:17,780 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:50:17,785 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:50:17,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2022-01-10 21:50:17,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed21bee94/04aea809e00d4afeb91b86d584df5df0/FLAGf1d189864 [2022-01-10 21:50:18,269 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:50:18,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label27.c [2022-01-10 21:50:18,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed21bee94/04aea809e00d4afeb91b86d584df5df0/FLAGf1d189864 [2022-01-10 21:50:18,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed21bee94/04aea809e00d4afeb91b86d584df5df0 [2022-01-10 21:50:18,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:50:18,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:50:18,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:50:18,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:50:18,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:50:18,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:50:18" (1/1) ... [2022-01-10 21:50:18,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee0df21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:18, skipping insertion in model container [2022-01-10 21:50:18,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:50:18" (1/1) ... [2022-01-10 21:50:18,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:50:18,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:50:19,060 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label27.c[54867,54880] [2022-01-10 21:50:19,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:50:19,100 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:50:19,224 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label27.c[54867,54880] [2022-01-10 21:50:19,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:50:19,250 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:50:19,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:19 WrapperNode [2022-01-10 21:50:19,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:50:19,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:50:19,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:50:19,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:50:19,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:19" (1/1) ... [2022-01-10 21:50:19,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:19" (1/1) ... [2022-01-10 21:50:19,350 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 21:50:19,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:50:19,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:50:19,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:50:19,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:50:19,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:19" (1/1) ... [2022-01-10 21:50:19,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:19" (1/1) ... [2022-01-10 21:50:19,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:19" (1/1) ... [2022-01-10 21:50:19,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:19" (1/1) ... [2022-01-10 21:50:19,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:19" (1/1) ... [2022-01-10 21:50:19,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:19" (1/1) ... [2022-01-10 21:50:19,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:19" (1/1) ... [2022-01-10 21:50:19,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:50:19,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:50:19,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:50:19,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:50:19,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:19" (1/1) ... [2022-01-10 21:50:19,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:50:19,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:50:19,482 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 21:50:19,494 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 21:50:19,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:50:19,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:50:19,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:50:19,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:50:19,609 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:50:19,611 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:50:21,050 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:50:21,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:50:21,056 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 21:50:21,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:50:21 BoogieIcfgContainer [2022-01-10 21:50:21,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:50:21,058 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:50:21,058 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:50:21,059 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:50:21,061 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:50:21" (1/1) ... [2022-01-10 21:50:21,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:50:21 BasicIcfg [2022-01-10 21:50:21,362 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:50:21,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:50:21,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:50:21,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:50:21,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:50:18" (1/4) ... [2022-01-10 21:50:21,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd8b849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:50:21, skipping insertion in model container [2022-01-10 21:50:21,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:50:19" (2/4) ... [2022-01-10 21:50:21,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd8b849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:50:21, skipping insertion in model container [2022-01-10 21:50:21,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:50:21" (3/4) ... [2022-01-10 21:50:21,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd8b849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:50:21, skipping insertion in model container [2022-01-10 21:50:21,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:50:21" (4/4) ... [2022-01-10 21:50:21,367 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label27.cTransformedIcfg [2022-01-10 21:50:21,371 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:50:21,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:50:21,409 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:50:21,415 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 21:50:21,415 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:50:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 21:50:21,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-10 21:50:21,445 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:21,446 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:21,446 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:21,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1147981819, now seen corresponding path program 1 times [2022-01-10 21:50:21,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:21,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696941111] [2022-01-10 21:50:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:21,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:22,105 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 21:50:22,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:22,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696941111] [2022-01-10 21:50:22,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696941111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:22,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:22,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:22,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258928054] [2022-01-10 21:50:22,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:22,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:22,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:22,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:22,139 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 21:50:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:23,344 INFO L93 Difference]: Finished difference Result 816 states and 1453 transitions. [2022-01-10 21:50:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:23,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 153 [2022-01-10 21:50:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:23,357 INFO L225 Difference]: With dead ends: 816 [2022-01-10 21:50:23,357 INFO L226 Difference]: Without dead ends: 450 [2022-01-10 21:50:23,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:23,363 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 157 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:23,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 130 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:50:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-01-10 21:50:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2022-01-10 21:50:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.621923937360179) internal successors, (725), 447 states have internal predecessors, (725), 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 21:50:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 725 transitions. [2022-01-10 21:50:23,414 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 725 transitions. Word has length 153 [2022-01-10 21:50:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:23,415 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 725 transitions. [2022-01-10 21:50:23,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 states have internal predecessors, (153), 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 21:50:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 725 transitions. [2022-01-10 21:50:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-10 21:50:23,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:23,418 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:23,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:50:23,418 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2130634735, now seen corresponding path program 1 times [2022-01-10 21:50:23,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:23,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846093096] [2022-01-10 21:50:23,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:23,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:23,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:23,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846093096] [2022-01-10 21:50:23,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846093096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:23,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:23,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:23,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147881602] [2022-01-10 21:50:23,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:23,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:23,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:23,533 INFO L87 Difference]: Start difference. First operand 448 states and 725 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 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 21:50:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:23,916 INFO L93 Difference]: Finished difference Result 1327 states and 2154 transitions. [2022-01-10 21:50:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:23,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 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 158 [2022-01-10 21:50:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:23,926 INFO L225 Difference]: With dead ends: 1327 [2022-01-10 21:50:23,926 INFO L226 Difference]: Without dead ends: 881 [2022-01-10 21:50:23,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:23,938 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 360 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:23,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 555 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 21:50:23,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-10 21:50:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 879. [2022-01-10 21:50:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.6207289293849658) internal successors, (1423), 878 states have internal predecessors, (1423), 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 21:50:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1423 transitions. [2022-01-10 21:50:24,027 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1423 transitions. Word has length 158 [2022-01-10 21:50:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:24,028 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 1423 transitions. [2022-01-10 21:50:24,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 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 21:50:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1423 transitions. [2022-01-10 21:50:24,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 21:50:24,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:24,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:24,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:50:24,032 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:24,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash 189444503, now seen corresponding path program 1 times [2022-01-10 21:50:24,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:24,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967275339] [2022-01-10 21:50:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:24,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:24,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:24,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967275339] [2022-01-10 21:50:24,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967275339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:24,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:24,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:24,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680890025] [2022-01-10 21:50:24,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:24,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:24,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:24,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:24,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:24,212 INFO L87 Difference]: Start difference. First operand 879 states and 1423 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 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 21:50:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:25,110 INFO L93 Difference]: Finished difference Result 2601 states and 4231 transitions. [2022-01-10 21:50:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:25,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 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 161 [2022-01-10 21:50:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:25,116 INFO L225 Difference]: With dead ends: 2601 [2022-01-10 21:50:25,117 INFO L226 Difference]: Without dead ends: 1724 [2022-01-10 21:50:25,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:25,120 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:25,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 95 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:50:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2022-01-10 21:50:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1699. [2022-01-10 21:50:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 1.588339222614841) internal successors, (2697), 1698 states have internal predecessors, (2697), 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 21:50:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2697 transitions. [2022-01-10 21:50:25,185 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2697 transitions. Word has length 161 [2022-01-10 21:50:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:25,185 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 2697 transitions. [2022-01-10 21:50:25,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 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 21:50:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2697 transitions. [2022-01-10 21:50:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-10 21:50:25,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:25,203 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:25,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:50:25,203 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2122048789, now seen corresponding path program 1 times [2022-01-10 21:50:25,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:25,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227423842] [2022-01-10 21:50:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:25,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:25,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:25,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227423842] [2022-01-10 21:50:25,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227423842] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:25,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:25,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:25,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990639083] [2022-01-10 21:50:25,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:25,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:25,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:25,413 INFO L87 Difference]: Start difference. First operand 1699 states and 2697 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 21:50:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:26,216 INFO L93 Difference]: Finished difference Result 5046 states and 8023 transitions. [2022-01-10 21:50:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:26,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 162 [2022-01-10 21:50:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:26,225 INFO L225 Difference]: With dead ends: 5046 [2022-01-10 21:50:26,226 INFO L226 Difference]: Without dead ends: 3349 [2022-01-10 21:50:26,227 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 21:50:26,228 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 255 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:26,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 137 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:50:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3349 states. [2022-01-10 21:50:26,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3349 to 3345. [2022-01-10 21:50:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3345 states, 3344 states have (on average 1.500598086124402) internal successors, (5018), 3344 states have internal predecessors, (5018), 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 21:50:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3345 states to 3345 states and 5018 transitions. [2022-01-10 21:50:26,326 INFO L78 Accepts]: Start accepts. Automaton has 3345 states and 5018 transitions. Word has length 162 [2022-01-10 21:50:26,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:26,326 INFO L470 AbstractCegarLoop]: Abstraction has 3345 states and 5018 transitions. [2022-01-10 21:50:26,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 2 states have internal predecessors, (162), 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 21:50:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3345 states and 5018 transitions. [2022-01-10 21:50:26,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-10 21:50:26,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:26,347 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:26,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 21:50:26,347 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:26,348 INFO L85 PathProgramCache]: Analyzing trace with hash 498047833, now seen corresponding path program 1 times [2022-01-10 21:50:26,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:26,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492762173] [2022-01-10 21:50:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:26,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:26,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:26,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492762173] [2022-01-10 21:50:26,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492762173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:26,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:26,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:26,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213452941] [2022-01-10 21:50:26,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:26,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:26,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:26,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:26,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:26,449 INFO L87 Difference]: Start difference. First operand 3345 states and 5018 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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 21:50:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:27,345 INFO L93 Difference]: Finished difference Result 8332 states and 12446 transitions. [2022-01-10 21:50:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:27,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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 163 [2022-01-10 21:50:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:27,358 INFO L225 Difference]: With dead ends: 8332 [2022-01-10 21:50:27,359 INFO L226 Difference]: Without dead ends: 4989 [2022-01-10 21:50:27,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:27,364 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:27,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 116 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:50:27,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4989 states. [2022-01-10 21:50:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4989 to 4987. [2022-01-10 21:50:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4987 states, 4986 states have (on average 1.4705174488567991) internal successors, (7332), 4986 states have internal predecessors, (7332), 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 21:50:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4987 states to 4987 states and 7332 transitions. [2022-01-10 21:50:27,491 INFO L78 Accepts]: Start accepts. Automaton has 4987 states and 7332 transitions. Word has length 163 [2022-01-10 21:50:27,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:27,492 INFO L470 AbstractCegarLoop]: Abstraction has 4987 states and 7332 transitions. [2022-01-10 21:50:27,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 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 21:50:27,494 INFO L276 IsEmpty]: Start isEmpty. Operand 4987 states and 7332 transitions. [2022-01-10 21:50:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 21:50:27,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:27,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:27,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 21:50:27,515 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:27,516 INFO L85 PathProgramCache]: Analyzing trace with hash 891180079, now seen corresponding path program 1 times [2022-01-10 21:50:27,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:27,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722832617] [2022-01-10 21:50:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:27,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:50:27,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:27,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722832617] [2022-01-10 21:50:27,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722832617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:27,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:27,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:27,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100551036] [2022-01-10 21:50:27,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:27,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:27,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:27,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:27,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:27,776 INFO L87 Difference]: Start difference. First operand 4987 states and 7332 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 21:50:28,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:28,635 INFO L93 Difference]: Finished difference Result 14874 states and 21889 transitions. [2022-01-10 21:50:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:28,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 168 [2022-01-10 21:50:28,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:28,663 INFO L225 Difference]: With dead ends: 14874 [2022-01-10 21:50:28,663 INFO L226 Difference]: Without dead ends: 9889 [2022-01-10 21:50:28,672 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 21:50:28,672 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 100 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:28,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 408 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:50:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9889 states. [2022-01-10 21:50:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9889 to 9469. [2022-01-10 21:50:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9469 states, 9468 states have (on average 1.4094845796366708) internal successors, (13345), 9468 states have internal predecessors, (13345), 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 21:50:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9469 states to 9469 states and 13345 transitions. [2022-01-10 21:50:28,853 INFO L78 Accepts]: Start accepts. Automaton has 9469 states and 13345 transitions. Word has length 168 [2022-01-10 21:50:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:28,854 INFO L470 AbstractCegarLoop]: Abstraction has 9469 states and 13345 transitions. [2022-01-10 21:50:28,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 21:50:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 9469 states and 13345 transitions. [2022-01-10 21:50:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-10 21:50:28,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:28,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:28,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 21:50:28,866 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:28,866 INFO L85 PathProgramCache]: Analyzing trace with hash 923576556, now seen corresponding path program 1 times [2022-01-10 21:50:28,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:28,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850867698] [2022-01-10 21:50:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:28,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:28,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:28,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850867698] [2022-01-10 21:50:28,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850867698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:28,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:28,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:28,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069477804] [2022-01-10 21:50:28,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:28,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:28,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:28,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:28,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:28,971 INFO L87 Difference]: Start difference. First operand 9469 states and 13345 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 21:50:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:29,941 INFO L93 Difference]: Finished difference Result 22036 states and 30955 transitions. [2022-01-10 21:50:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:29,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 181 [2022-01-10 21:50:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:29,971 INFO L225 Difference]: With dead ends: 22036 [2022-01-10 21:50:29,971 INFO L226 Difference]: Without dead ends: 12569 [2022-01-10 21:50:29,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:29,985 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 222 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:29,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 143 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:50:29,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12569 states. [2022-01-10 21:50:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12569 to 12564. [2022-01-10 21:50:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12564 states, 12563 states have (on average 1.4002228767014249) internal successors, (17591), 12563 states have internal predecessors, (17591), 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 21:50:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12564 states to 12564 states and 17591 transitions. [2022-01-10 21:50:30,171 INFO L78 Accepts]: Start accepts. Automaton has 12564 states and 17591 transitions. Word has length 181 [2022-01-10 21:50:30,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:30,172 INFO L470 AbstractCegarLoop]: Abstraction has 12564 states and 17591 transitions. [2022-01-10 21:50:30,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 21:50:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 12564 states and 17591 transitions. [2022-01-10 21:50:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-10 21:50:30,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:30,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:30,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 21:50:30,221 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:30,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:30,221 INFO L85 PathProgramCache]: Analyzing trace with hash 494685263, now seen corresponding path program 1 times [2022-01-10 21:50:30,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:30,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734106989] [2022-01-10 21:50:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:30,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:30,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:30,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734106989] [2022-01-10 21:50:30,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734106989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:30,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:30,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:30,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012969275] [2022-01-10 21:50:30,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:30,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:30,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:30,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:30,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:30,336 INFO L87 Difference]: Start difference. First operand 12564 states and 17591 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 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 21:50:31,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:31,228 INFO L93 Difference]: Finished difference Result 36337 states and 50870 transitions. [2022-01-10 21:50:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:31,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 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 186 [2022-01-10 21:50:31,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:31,266 INFO L225 Difference]: With dead ends: 36337 [2022-01-10 21:50:31,266 INFO L226 Difference]: Without dead ends: 23775 [2022-01-10 21:50:31,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:31,282 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 223 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:31,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 170 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 21:50:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23775 states. [2022-01-10 21:50:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23775 to 22751. [2022-01-10 21:50:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22751 states, 22750 states have (on average 1.347076923076923) internal successors, (30646), 22750 states have internal predecessors, (30646), 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 21:50:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22751 states to 22751 states and 30646 transitions. [2022-01-10 21:50:31,691 INFO L78 Accepts]: Start accepts. Automaton has 22751 states and 30646 transitions. Word has length 186 [2022-01-10 21:50:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:31,692 INFO L470 AbstractCegarLoop]: Abstraction has 22751 states and 30646 transitions. [2022-01-10 21:50:31,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 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 21:50:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 22751 states and 30646 transitions. [2022-01-10 21:50:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-10 21:50:31,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:31,713 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:31,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 21:50:31,714 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:31,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:31,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2139950980, now seen corresponding path program 1 times [2022-01-10 21:50:31,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:31,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306446546] [2022-01-10 21:50:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:31,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:31,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:31,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306446546] [2022-01-10 21:50:31,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306446546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:31,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:31,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:31,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567871885] [2022-01-10 21:50:31,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:31,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:31,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:31,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:31,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:31,867 INFO L87 Difference]: Start difference. First operand 22751 states and 30646 transitions. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 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 21:50:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:33,072 INFO L93 Difference]: Finished difference Result 56886 states and 76491 transitions. [2022-01-10 21:50:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:33,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 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 188 [2022-01-10 21:50:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:33,130 INFO L225 Difference]: With dead ends: 56886 [2022-01-10 21:50:33,131 INFO L226 Difference]: Without dead ends: 34137 [2022-01-10 21:50:33,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:33,151 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 808 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:33,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 381 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 21:50:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34137 states. [2022-01-10 21:50:33,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34137 to 33520. [2022-01-10 21:50:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33520 states, 33519 states have (on average 1.3226229899460007) internal successors, (44333), 33519 states have internal predecessors, (44333), 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 21:50:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33520 states to 33520 states and 44333 transitions. [2022-01-10 21:50:33,572 INFO L78 Accepts]: Start accepts. Automaton has 33520 states and 44333 transitions. Word has length 188 [2022-01-10 21:50:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:33,572 INFO L470 AbstractCegarLoop]: Abstraction has 33520 states and 44333 transitions. [2022-01-10 21:50:33,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 3 states have internal predecessors, (188), 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 21:50:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 33520 states and 44333 transitions. [2022-01-10 21:50:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 21:50:33,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:33,597 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:33,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 21:50:33,597 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:33,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1837162853, now seen corresponding path program 1 times [2022-01-10 21:50:33,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:33,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427000748] [2022-01-10 21:50:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:33,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:50:33,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:33,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427000748] [2022-01-10 21:50:33,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427000748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:33,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:33,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:33,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836443395] [2022-01-10 21:50:33,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:33,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:33,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:33,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:33,815 INFO L87 Difference]: Start difference. First operand 33520 states and 44333 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 21:50:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:34,994 INFO L93 Difference]: Finished difference Result 81715 states and 108041 transitions. [2022-01-10 21:50:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:34,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 201 [2022-01-10 21:50:34,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:35,061 INFO L225 Difference]: With dead ends: 81715 [2022-01-10 21:50:35,061 INFO L226 Difference]: Without dead ends: 48197 [2022-01-10 21:50:35,197 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 21:50:35,197 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 196 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:35,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 399 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:50:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48197 states. [2022-01-10 21:50:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48197 to 48136. [2022-01-10 21:50:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48136 states, 48135 states have (on average 1.2706346733146359) internal successors, (61162), 48135 states have internal predecessors, (61162), 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 21:50:35,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48136 states to 48136 states and 61162 transitions. [2022-01-10 21:50:35,934 INFO L78 Accepts]: Start accepts. Automaton has 48136 states and 61162 transitions. Word has length 201 [2022-01-10 21:50:35,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:35,935 INFO L470 AbstractCegarLoop]: Abstraction has 48136 states and 61162 transitions. [2022-01-10 21:50:35,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 21:50:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 48136 states and 61162 transitions. [2022-01-10 21:50:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-10 21:50:35,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:35,968 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:35,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 21:50:35,968 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:35,969 INFO L85 PathProgramCache]: Analyzing trace with hash -226091697, now seen corresponding path program 1 times [2022-01-10 21:50:35,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:35,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493531261] [2022-01-10 21:50:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:35,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-10 21:50:36,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:36,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493531261] [2022-01-10 21:50:36,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493531261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:36,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:36,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:36,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627076565] [2022-01-10 21:50:36,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:36,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:36,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:36,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:36,180 INFO L87 Difference]: Start difference. First operand 48136 states and 61162 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 21:50:37,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:37,296 INFO L93 Difference]: Finished difference Result 95692 states and 121477 transitions. [2022-01-10 21:50:37,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:37,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 211 [2022-01-10 21:50:37,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:37,451 INFO L225 Difference]: With dead ends: 95692 [2022-01-10 21:50:37,451 INFO L226 Difference]: Without dead ends: 47558 [2022-01-10 21:50:37,479 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 21:50:37,479 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 219 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:37,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 387 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:50:37,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47558 states. [2022-01-10 21:50:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47558 to 47525. [2022-01-10 21:50:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47525 states, 47524 states have (on average 1.2618045619055636) internal successors, (59966), 47524 states have internal predecessors, (59966), 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 21:50:38,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47525 states to 47525 states and 59966 transitions. [2022-01-10 21:50:38,192 INFO L78 Accepts]: Start accepts. Automaton has 47525 states and 59966 transitions. Word has length 211 [2022-01-10 21:50:38,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:38,192 INFO L470 AbstractCegarLoop]: Abstraction has 47525 states and 59966 transitions. [2022-01-10 21:50:38,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 21:50:38,193 INFO L276 IsEmpty]: Start isEmpty. Operand 47525 states and 59966 transitions. [2022-01-10 21:50:38,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-10 21:50:38,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:38,219 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:38,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 21:50:38,220 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:38,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1748702983, now seen corresponding path program 1 times [2022-01-10 21:50:38,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:38,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055875542] [2022-01-10 21:50:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:38,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 21:50:38,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:38,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055875542] [2022-01-10 21:50:38,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055875542] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:38,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:38,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:38,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037564612] [2022-01-10 21:50:38,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:38,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:38,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:38,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:38,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:38,315 INFO L87 Difference]: Start difference. First operand 47525 states and 59966 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 21:50:39,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:39,613 INFO L93 Difference]: Finished difference Result 104428 states and 131383 transitions. [2022-01-10 21:50:39,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:39,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 213 [2022-01-10 21:50:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:39,715 INFO L225 Difference]: With dead ends: 104428 [2022-01-10 21:50:39,715 INFO L226 Difference]: Without dead ends: 56905 [2022-01-10 21:50:39,749 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 21:50:39,750 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 222 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:39,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 426 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:50:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56905 states. [2022-01-10 21:50:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56905 to 54662. [2022-01-10 21:50:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54662 states, 54661 states have (on average 1.2451473628363916) internal successors, (68061), 54661 states have internal predecessors, (68061), 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 21:50:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54662 states to 54662 states and 68061 transitions. [2022-01-10 21:50:40,637 INFO L78 Accepts]: Start accepts. Automaton has 54662 states and 68061 transitions. Word has length 213 [2022-01-10 21:50:40,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:40,637 INFO L470 AbstractCegarLoop]: Abstraction has 54662 states and 68061 transitions. [2022-01-10 21:50:40,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 21:50:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 54662 states and 68061 transitions. [2022-01-10 21:50:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-10 21:50:40,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:40,670 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:40,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 21:50:40,670 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:40,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:40,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2088183965, now seen corresponding path program 1 times [2022-01-10 21:50:40,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:40,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004799658] [2022-01-10 21:50:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:40,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:40,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:40,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004799658] [2022-01-10 21:50:40,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004799658] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:40,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:40,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:40,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808795446] [2022-01-10 21:50:40,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:40,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:40,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:40,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:40,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:40,798 INFO L87 Difference]: Start difference. First operand 54662 states and 68061 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 21:50:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:42,621 INFO L93 Difference]: Finished difference Result 111211 states and 138501 transitions. [2022-01-10 21:50:42,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:42,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 217 [2022-01-10 21:50:42,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:42,710 INFO L225 Difference]: With dead ends: 111211 [2022-01-10 21:50:42,710 INFO L226 Difference]: Without dead ends: 56551 [2022-01-10 21:50:42,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:42,728 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 392 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:42,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 170 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 21:50:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56551 states. [2022-01-10 21:50:43,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56551 to 53027. [2022-01-10 21:50:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53027 states, 53026 states have (on average 1.2428054162109154) internal successors, (65901), 53026 states have internal predecessors, (65901), 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 21:50:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53027 states to 53027 states and 65901 transitions. [2022-01-10 21:50:43,550 INFO L78 Accepts]: Start accepts. Automaton has 53027 states and 65901 transitions. Word has length 217 [2022-01-10 21:50:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:43,550 INFO L470 AbstractCegarLoop]: Abstraction has 53027 states and 65901 transitions. [2022-01-10 21:50:43,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 21:50:43,551 INFO L276 IsEmpty]: Start isEmpty. Operand 53027 states and 65901 transitions. [2022-01-10 21:50:43,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-10 21:50:43,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:43,586 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:43,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 21:50:43,587 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:43,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:43,587 INFO L85 PathProgramCache]: Analyzing trace with hash 681384597, now seen corresponding path program 1 times [2022-01-10 21:50:43,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:43,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740231626] [2022-01-10 21:50:43,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:43,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:50:43,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:43,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740231626] [2022-01-10 21:50:43,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740231626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:43,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:43,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:50:43,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171920163] [2022-01-10 21:50:43,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:43,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:43,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:43,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:43,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:43,891 INFO L87 Difference]: Start difference. First operand 53027 states and 65901 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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 21:50:45,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:45,129 INFO L93 Difference]: Finished difference Result 124525 states and 154607 transitions. [2022-01-10 21:50:45,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:45,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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 217 [2022-01-10 21:50:45,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:45,227 INFO L225 Difference]: With dead ends: 124525 [2022-01-10 21:50:45,228 INFO L226 Difference]: Without dead ends: 71500 [2022-01-10 21:50:45,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:50:45,263 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 183 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:45,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 166 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:50:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71500 states. [2022-01-10 21:50:46,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71500 to 61748. [2022-01-10 21:50:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61748 states, 61747 states have (on average 1.1604288467455908) internal successors, (71653), 61747 states have internal predecessors, (71653), 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 21:50:46,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61748 states to 61748 states and 71653 transitions. [2022-01-10 21:50:46,257 INFO L78 Accepts]: Start accepts. Automaton has 61748 states and 71653 transitions. Word has length 217 [2022-01-10 21:50:46,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:46,258 INFO L470 AbstractCegarLoop]: Abstraction has 61748 states and 71653 transitions. [2022-01-10 21:50:46,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 2 states have internal predecessors, (217), 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 21:50:46,258 INFO L276 IsEmpty]: Start isEmpty. Operand 61748 states and 71653 transitions. [2022-01-10 21:50:46,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-10 21:50:46,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:46,291 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:46,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 21:50:46,292 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:46,292 INFO L85 PathProgramCache]: Analyzing trace with hash -936845521, now seen corresponding path program 1 times [2022-01-10 21:50:46,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:46,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390317566] [2022-01-10 21:50:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:46,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-10 21:50:46,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:46,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390317566] [2022-01-10 21:50:46,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390317566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:46,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:46,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:46,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908206463] [2022-01-10 21:50:46,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:46,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:46,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:46,434 INFO L87 Difference]: Start difference. First operand 61748 states and 71653 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 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 21:50:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:48,237 INFO L93 Difference]: Finished difference Result 178307 states and 207574 transitions. [2022-01-10 21:50:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:48,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 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 239 [2022-01-10 21:50:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:48,407 INFO L225 Difference]: With dead ends: 178307 [2022-01-10 21:50:48,407 INFO L226 Difference]: Without dead ends: 116561 [2022-01-10 21:50:48,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:48,448 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 523 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:48,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 547 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 21:50:48,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116561 states. [2022-01-10 21:50:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116561 to 113881. [2022-01-10 21:50:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113881 states, 113880 states have (on average 1.1675886898489638) internal successors, (132965), 113880 states have internal predecessors, (132965), 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 21:50:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113881 states to 113881 states and 132965 transitions. [2022-01-10 21:50:50,119 INFO L78 Accepts]: Start accepts. Automaton has 113881 states and 132965 transitions. Word has length 239 [2022-01-10 21:50:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:50,119 INFO L470 AbstractCegarLoop]: Abstraction has 113881 states and 132965 transitions. [2022-01-10 21:50:50,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 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 21:50:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 113881 states and 132965 transitions. [2022-01-10 21:50:50,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-10 21:50:50,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:50,152 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:50,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 21:50:50,153 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:50,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:50,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1039694928, now seen corresponding path program 1 times [2022-01-10 21:50:50,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:50,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111681936] [2022-01-10 21:50:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:50,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-01-10 21:50:50,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:50,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111681936] [2022-01-10 21:50:50,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111681936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:50:50,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094838701] [2022-01-10 21:50:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:50,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:50:50,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:50:50,291 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 21:50:50,321 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 21:50:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 7735 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 21:50:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:50:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 21:50:51,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:50:51,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094838701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:51,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:50:51,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:50:51,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200144441] [2022-01-10 21:50:51,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:51,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:51,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:51,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:51,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:50:51,565 INFO L87 Difference]: Start difference. First operand 113881 states and 132965 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 21:50:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:53,269 INFO L93 Difference]: Finished difference Result 244731 states and 286024 transitions. [2022-01-10 21:50:53,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:50:53,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 255 [2022-01-10 21:50:53,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:53,481 INFO L225 Difference]: With dead ends: 244731 [2022-01-10 21:50:53,481 INFO L226 Difference]: Without dead ends: 130852 [2022-01-10 21:50:53,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:50:53,512 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 89 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:53,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 198 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:50:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130852 states. [2022-01-10 21:50:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130852 to 130754. [2022-01-10 21:50:55,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130754 states, 130753 states have (on average 1.1639274051073398) internal successors, (152187), 130753 states have internal predecessors, (152187), 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 21:50:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130754 states to 130754 states and 152187 transitions. [2022-01-10 21:50:55,374 INFO L78 Accepts]: Start accepts. Automaton has 130754 states and 152187 transitions. Word has length 255 [2022-01-10 21:50:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:55,375 INFO L470 AbstractCegarLoop]: Abstraction has 130754 states and 152187 transitions. [2022-01-10 21:50:55,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 21:50:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 130754 states and 152187 transitions. [2022-01-10 21:50:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-10 21:50:55,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:55,413 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:55,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 21:50:55,635 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,SelfDestructingSolverStorable15 [2022-01-10 21:50:55,636 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash 259355478, now seen corresponding path program 1 times [2022-01-10 21:50:55,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:55,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122355458] [2022-01-10 21:50:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:55,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:50:56,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:56,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122355458] [2022-01-10 21:50:56,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122355458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:56,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:56,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:56,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343200332] [2022-01-10 21:50:56,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:56,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:50:56,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:56,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:50:56,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:56,082 INFO L87 Difference]: Start difference. First operand 130754 states and 152187 transitions. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 3 states have internal predecessors, (256), 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 21:50:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:50:57,936 INFO L93 Difference]: Finished difference Result 264379 states and 307487 transitions. [2022-01-10 21:50:57,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:50:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 3 states have internal predecessors, (256), 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 261 [2022-01-10 21:50:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:50:58,139 INFO L225 Difference]: With dead ends: 264379 [2022-01-10 21:50:58,139 INFO L226 Difference]: Without dead ends: 133627 [2022-01-10 21:50:58,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:50:58,210 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 413 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:50:58,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 378 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:50:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133627 states. [2022-01-10 21:50:59,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133627 to 102659. [2022-01-10 21:50:59,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102659 states, 102658 states have (on average 1.168452531707222) internal successors, (119951), 102658 states have internal predecessors, (119951), 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 21:50:59,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102659 states to 102659 states and 119951 transitions. [2022-01-10 21:50:59,793 INFO L78 Accepts]: Start accepts. Automaton has 102659 states and 119951 transitions. Word has length 261 [2022-01-10 21:50:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:50:59,794 INFO L470 AbstractCegarLoop]: Abstraction has 102659 states and 119951 transitions. [2022-01-10 21:50:59,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 3 states have internal predecessors, (256), 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 21:50:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 102659 states and 119951 transitions. [2022-01-10 21:50:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-01-10 21:50:59,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:50:59,826 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:50:59,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 21:50:59,826 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:50:59,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:50:59,827 INFO L85 PathProgramCache]: Analyzing trace with hash 947949323, now seen corresponding path program 1 times [2022-01-10 21:50:59,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:50:59,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013014703] [2022-01-10 21:50:59,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:50:59,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:50:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:50:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-10 21:50:59,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:50:59,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013014703] [2022-01-10 21:50:59,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013014703] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:50:59,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:50:59,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:50:59,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862874988] [2022-01-10 21:50:59,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:50:59,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:50:59,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:50:59,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:50:59,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:50:59,977 INFO L87 Difference]: Start difference. First operand 102659 states and 119951 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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 21:51:01,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:01,579 INFO L93 Difference]: Finished difference Result 186969 states and 217991 transitions. [2022-01-10 21:51:01,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:01,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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 272 [2022-01-10 21:51:01,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:01,710 INFO L225 Difference]: With dead ends: 186969 [2022-01-10 21:51:01,710 INFO L226 Difference]: Without dead ends: 84312 [2022-01-10 21:51:01,754 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 21:51:01,756 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 277 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:01,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 366 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:01,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84312 states. [2022-01-10 21:51:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84312 to 83699. [2022-01-10 21:51:02,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83699 states, 83698 states have (on average 1.1350091997419294) internal successors, (94998), 83698 states have internal predecessors, (94998), 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 21:51:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83699 states to 83699 states and 94998 transitions. [2022-01-10 21:51:02,994 INFO L78 Accepts]: Start accepts. Automaton has 83699 states and 94998 transitions. Word has length 272 [2022-01-10 21:51:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:02,995 INFO L470 AbstractCegarLoop]: Abstraction has 83699 states and 94998 transitions. [2022-01-10 21:51:02,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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 21:51:02,995 INFO L276 IsEmpty]: Start isEmpty. Operand 83699 states and 94998 transitions. [2022-01-10 21:51:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-01-10 21:51:03,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:03,028 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:51:03,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 21:51:03,028 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:03,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:03,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1586926191, now seen corresponding path program 1 times [2022-01-10 21:51:03,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:03,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856446569] [2022-01-10 21:51:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:03,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 21:51:03,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:03,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856446569] [2022-01-10 21:51:03,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856446569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:03,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:03,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:03,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814111921] [2022-01-10 21:51:03,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:03,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:03,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:03,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:03,184 INFO L87 Difference]: Start difference. First operand 83699 states and 94998 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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 21:51:04,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:04,196 INFO L93 Difference]: Finished difference Result 231498 states and 263297 transitions. [2022-01-10 21:51:04,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:04,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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 278 [2022-01-10 21:51:04,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:04,409 INFO L225 Difference]: With dead ends: 231498 [2022-01-10 21:51:04,409 INFO L226 Difference]: Without dead ends: 147801 [2022-01-10 21:51:04,468 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 21:51:04,469 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 317 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:04,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 941 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 21:51:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147801 states. [2022-01-10 21:51:06,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147801 to 142112. [2022-01-10 21:51:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142112 states, 142111 states have (on average 1.12697117042312) internal successors, (160155), 142111 states have internal predecessors, (160155), 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 21:51:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142112 states to 142112 states and 160155 transitions. [2022-01-10 21:51:06,735 INFO L78 Accepts]: Start accepts. Automaton has 142112 states and 160155 transitions. Word has length 278 [2022-01-10 21:51:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:06,735 INFO L470 AbstractCegarLoop]: Abstraction has 142112 states and 160155 transitions. [2022-01-10 21:51:06,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 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 21:51:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 142112 states and 160155 transitions. [2022-01-10 21:51:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-10 21:51:06,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:06,777 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:06,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 21:51:06,777 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:06,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:06,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1328985833, now seen corresponding path program 1 times [2022-01-10 21:51:06,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:06,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915184206] [2022-01-10 21:51:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:06,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 21:51:07,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:07,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915184206] [2022-01-10 21:51:07,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915184206] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:07,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:07,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:07,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650818600] [2022-01-10 21:51:07,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:07,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:51:07,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:51:07,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:07,129 INFO L87 Difference]: Start difference. First operand 142112 states and 160155 transitions. Second operand has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 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 21:51:09,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:09,369 INFO L93 Difference]: Finished difference Result 287324 states and 323795 transitions. [2022-01-10 21:51:09,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:51:09,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 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 287 [2022-01-10 21:51:09,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:09,603 INFO L225 Difference]: With dead ends: 287324 [2022-01-10 21:51:09,603 INFO L226 Difference]: Without dead ends: 145214 [2022-01-10 21:51:09,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:09,666 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 370 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:09,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 191 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 21:51:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145214 states. [2022-01-10 21:51:11,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145214 to 145157. [2022-01-10 21:51:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145157 states, 145156 states have (on average 1.1232398247402795) internal successors, (163045), 145156 states have internal predecessors, (163045), 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 21:51:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145157 states to 145157 states and 163045 transitions. [2022-01-10 21:51:11,877 INFO L78 Accepts]: Start accepts. Automaton has 145157 states and 163045 transitions. Word has length 287 [2022-01-10 21:51:11,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:11,878 INFO L470 AbstractCegarLoop]: Abstraction has 145157 states and 163045 transitions. [2022-01-10 21:51:11,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.75) internal successors, (255), 3 states have internal predecessors, (255), 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 21:51:11,878 INFO L276 IsEmpty]: Start isEmpty. Operand 145157 states and 163045 transitions. [2022-01-10 21:51:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-10 21:51:11,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:11,917 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:51:11,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-10 21:51:11,917 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:11,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:11,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1467119761, now seen corresponding path program 1 times [2022-01-10 21:51:11,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:11,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826583001] [2022-01-10 21:51:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:11,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-01-10 21:51:12,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826583001] [2022-01-10 21:51:12,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826583001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:12,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:12,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:12,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701587025] [2022-01-10 21:51:12,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:12,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:51:12,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:12,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:51:12,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:12,034 INFO L87 Difference]: Start difference. First operand 145157 states and 163045 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 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 21:51:14,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:14,760 INFO L93 Difference]: Finished difference Result 424064 states and 475704 transitions. [2022-01-10 21:51:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:51:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 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 290 [2022-01-10 21:51:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:15,533 INFO L225 Difference]: With dead ends: 424064 [2022-01-10 21:51:15,533 INFO L226 Difference]: Without dead ends: 278909 [2022-01-10 21:51:15,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:15,695 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 779 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:15,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 441 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 21:51:15,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278909 states. [2022-01-10 21:51:18,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278909 to 253898. [2022-01-10 21:51:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253898 states, 253897 states have (on average 1.119316100623481) internal successors, (284191), 253897 states have internal predecessors, (284191), 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 21:51:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253898 states to 253898 states and 284191 transitions. [2022-01-10 21:51:19,039 INFO L78 Accepts]: Start accepts. Automaton has 253898 states and 284191 transitions. Word has length 290 [2022-01-10 21:51:19,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:19,039 INFO L470 AbstractCegarLoop]: Abstraction has 253898 states and 284191 transitions. [2022-01-10 21:51:19,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 3 states have internal predecessors, (203), 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 21:51:19,039 INFO L276 IsEmpty]: Start isEmpty. Operand 253898 states and 284191 transitions. [2022-01-10 21:51:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-01-10 21:51:19,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:19,073 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:19,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-10 21:51:19,073 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash -539403078, now seen corresponding path program 1 times [2022-01-10 21:51:19,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:19,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874531389] [2022-01-10 21:51:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:19,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 21:51:19,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:19,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874531389] [2022-01-10 21:51:19,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874531389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:19,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:19,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:19,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002963646] [2022-01-10 21:51:19,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:19,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:19,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:19,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:19,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:19,480 INFO L87 Difference]: Start difference. First operand 253898 states and 284191 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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)