/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_LAZY.epf -i ../../../trunk/examples/svcomp/heap-manipulation/dancing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 17:40:55,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 17:40:55,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 17:40:55,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 17:40:55,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 17:40:55,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 17:40:55,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 17:40:55,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 17:40:55,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 17:40:55,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 17:40:55,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 17:40:55,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 17:40:55,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 17:40:55,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 17:40:55,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 17:40:55,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 17:40:55,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 17:40:55,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 17:40:55,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 17:40:55,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 17:40:55,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 17:40:55,234 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 17:40:55,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 17:40:55,235 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 17:40:55,235 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 17:40:55,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 17:40:55,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 17:40:55,236 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 17:40:55,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 17:40:55,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 17:40:55,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 17:40:55,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 17:40:55,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 17:40:55,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 17:40:55,237 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 17:40:55,237 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 17:40:55,237 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 17:40:55,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 17:40:55,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 17:40:55,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 17:40:55,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 17:40:55,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 17:40:55,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 17:40:55,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 17:40:55,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 17:40:55,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 17:40:55,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 17:40:55,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 17:40:55,239 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 17:40:55,239 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 17:40:55,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 17:40:55,239 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 17:40:55,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 17:40:55,240 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 17:40:55,240 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 17:40:55,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 17:40:55,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 17:40:55,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 17:40:55,481 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 17:40:55,487 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 17:40:55,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dancing.i [2022-01-10 17:40:55,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c32bb021b/4ec58c18503f46a5a4a9eb299a9daf6a/FLAG77caa9571 [2022-01-10 17:40:55,999 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 17:40:56,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/dancing.i [2022-01-10 17:40:56,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c32bb021b/4ec58c18503f46a5a4a9eb299a9daf6a/FLAG77caa9571 [2022-01-10 17:40:56,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c32bb021b/4ec58c18503f46a5a4a9eb299a9daf6a [2022-01-10 17:40:56,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 17:40:56,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 17:40:56,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 17:40:56,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 17:40:56,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 17:40:56,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:40:56" (1/1) ... [2022-01-10 17:40:56,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70c2eb31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56, skipping insertion in model container [2022-01-10 17:40:56,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:40:56" (1/1) ... [2022-01-10 17:40:56,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 17:40:56,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 17:40:56,238 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/dancing.i[938,951] [2022-01-10 17:40:56,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 17:40:56,334 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 17:40:56,345 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/dancing.i[938,951] [2022-01-10 17:40:56,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 17:40:56,434 INFO L208 MainTranslator]: Completed translation [2022-01-10 17:40:56,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56 WrapperNode [2022-01-10 17:40:56,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 17:40:56,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 17:40:56,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 17:40:56,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 17:40:56,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56" (1/1) ... [2022-01-10 17:40:56,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56" (1/1) ... [2022-01-10 17:40:56,491 INFO L137 Inliner]: procedures = 125, calls = 40, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 103 [2022-01-10 17:40:56,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 17:40:56,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 17:40:56,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 17:40:56,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 17:40:56,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56" (1/1) ... [2022-01-10 17:40:56,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56" (1/1) ... [2022-01-10 17:40:56,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56" (1/1) ... [2022-01-10 17:40:56,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56" (1/1) ... [2022-01-10 17:40:56,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56" (1/1) ... [2022-01-10 17:40:56,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56" (1/1) ... [2022-01-10 17:40:56,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56" (1/1) ... [2022-01-10 17:40:56,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 17:40:56,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 17:40:56,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 17:40:56,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 17:40:56,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56" (1/1) ... [2022-01-10 17:40:56,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 17:40:56,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:40:56,564 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 17:40:56,569 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 17:40:56,605 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2022-01-10 17:40:56,606 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2022-01-10 17:40:56,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 17:40:56,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 17:40:56,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 17:40:56,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 17:40:56,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 17:40:56,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 17:40:56,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 17:40:56,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 17:40:56,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 17:40:56,784 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 17:40:56,786 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 17:40:57,128 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 17:40:57,134 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 17:40:57,134 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 17:40:57,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:40:57 BoogieIcfgContainer [2022-01-10 17:40:57,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 17:40:57,136 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 17:40:57,136 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 17:40:57,141 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 17:40:57,144 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:40:57" (1/1) ... [2022-01-10 17:40:57,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 05:40:57 BasicIcfg [2022-01-10 17:40:57,250 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 17:40:57,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 17:40:57,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 17:40:57,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 17:40:57,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 05:40:56" (1/4) ... [2022-01-10 17:40:57,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261d1261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:40:57, skipping insertion in model container [2022-01-10 17:40:57,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:40:56" (2/4) ... [2022-01-10 17:40:57,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261d1261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:40:57, skipping insertion in model container [2022-01-10 17:40:57,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:40:57" (3/4) ... [2022-01-10 17:40:57,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261d1261 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 05:40:57, skipping insertion in model container [2022-01-10 17:40:57,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 05:40:57" (4/4) ... [2022-01-10 17:40:57,257 INFO L111 eAbstractionObserver]: Analyzing ICFG dancing.iTransformedIcfg [2022-01-10 17:40:57,261 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 17:40:57,262 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 17:40:57,324 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 17:40:57,329 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 17:40:57,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 17:40:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 17:40:57,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 17:40:57,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:40:57,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 17:40:57,353 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:40:57,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:40:57,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1870213, now seen corresponding path program 1 times [2022-01-10 17:40:57,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:40:57,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660055689] [2022-01-10 17:40:57,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:40:57,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:40:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:57,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:40:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:57,641 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 17:40:57,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:40:57,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660055689] [2022-01-10 17:40:57,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660055689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:40:57,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:40:57,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 17:40:57,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166397710] [2022-01-10 17:40:57,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:40:57,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 17:40:57,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:40:57,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 17:40:57,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 17:40:57,685 INFO L87 Difference]: Start difference. First operand has 41 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 17:40:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:40:57,703 INFO L93 Difference]: Finished difference Result 77 states and 105 transitions. [2022-01-10 17:40:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 17:40:57,704 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-10 17:40:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:40:57,709 INFO L225 Difference]: With dead ends: 77 [2022-01-10 17:40:57,709 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 17:40:57,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 17:40:57,715 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 17:40:57,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 17:40:57,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 17:40:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-10 17:40:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 31 states have internal predecessors, (41), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 17:40:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-01-10 17:40:57,754 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 19 [2022-01-10 17:40:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:40:57,755 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-01-10 17:40:57,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 17:40:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-01-10 17:40:57,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 17:40:57,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:40:57,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 17:40:57,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 17:40:57,761 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:40:57,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:40:57,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1154925979, now seen corresponding path program 1 times [2022-01-10 17:40:57,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:40:57,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082834176] [2022-01-10 17:40:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:40:57,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:40:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:57,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:40:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:57,963 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 17:40:57,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:40:57,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082834176] [2022-01-10 17:40:57,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082834176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:40:57,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:40:57,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 17:40:57,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510250807] [2022-01-10 17:40:57,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:40:57,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 17:40:57,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:40:57,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 17:40:57,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 17:40:57,969 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 17:40:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:40:58,017 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-01-10 17:40:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 17:40:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-10 17:40:58,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:40:58,018 INFO L225 Difference]: With dead ends: 42 [2022-01-10 17:40:58,018 INFO L226 Difference]: Without dead ends: 40 [2022-01-10 17:40:58,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 17:40:58,020 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 17:40:58,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 125 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 17:40:58,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-10 17:40:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-01-10 17:40:58,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.34375) internal successors, (43), 33 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-10 17:40:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2022-01-10 17:40:58,030 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 19 [2022-01-10 17:40:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:40:58,032 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2022-01-10 17:40:58,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 17:40:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2022-01-10 17:40:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 17:40:58,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:40:58,033 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] [2022-01-10 17:40:58,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 17:40:58,033 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:40:58,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:40:58,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2029966424, now seen corresponding path program 1 times [2022-01-10 17:40:58,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:40:58,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711159263] [2022-01-10 17:40:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:40:58,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:40:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:58,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:40:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:58,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-10 17:40:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 17:40:58,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:40:58,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711159263] [2022-01-10 17:40:58,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711159263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:40:58,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:40:58,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 17:40:58,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681358768] [2022-01-10 17:40:58,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:40:58,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 17:40:58,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:40:58,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 17:40:58,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 17:40:58,170 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 17:40:58,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:40:58,244 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2022-01-10 17:40:58,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 17:40:58,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-01-10 17:40:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:40:58,246 INFO L225 Difference]: With dead ends: 87 [2022-01-10 17:40:58,246 INFO L226 Difference]: Without dead ends: 64 [2022-01-10 17:40:58,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 17:40:58,248 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 24 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 17:40:58,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 132 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 17:40:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-10 17:40:58,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2022-01-10 17:40:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.372093023255814) internal successors, (59), 44 states have internal predecessors, (59), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 17:40:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-01-10 17:40:58,260 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 25 [2022-01-10 17:40:58,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:40:58,260 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-01-10 17:40:58,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 17:40:58,261 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-01-10 17:40:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 17:40:58,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:40:58,262 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] [2022-01-10 17:40:58,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 17:40:58,262 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:40:58,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:40:58,263 INFO L85 PathProgramCache]: Analyzing trace with hash -865419746, now seen corresponding path program 1 times [2022-01-10 17:40:58,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:40:58,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348657981] [2022-01-10 17:40:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:40:58,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:40:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:58,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 17:40:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:58,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-10 17:40:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 17:40:58,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:40:58,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348657981] [2022-01-10 17:40:58,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348657981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:40:58,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585709582] [2022-01-10 17:40:58,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:40:58,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:40:58,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:40:58,507 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 17:40:58,514 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 17:40:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:58,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 17:40:58,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:40:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 17:40:58,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 17:40:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 17:40:58,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585709582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 17:40:58,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 17:40:58,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-01-10 17:40:58,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882949277] [2022-01-10 17:40:58,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 17:40:58,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 17:40:58,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:40:58,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 17:40:58,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-10 17:40:58,972 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 17:40:59,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:40:59,303 INFO L93 Difference]: Finished difference Result 120 states and 161 transitions. [2022-01-10 17:40:59,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 17:40:59,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-01-10 17:40:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:40:59,306 INFO L225 Difference]: With dead ends: 120 [2022-01-10 17:40:59,306 INFO L226 Difference]: Without dead ends: 87 [2022-01-10 17:40:59,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-10 17:40:59,307 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 128 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 17:40:59,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 499 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 17:40:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-10 17:40:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 61. [2022-01-10 17:40:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 54 states have internal predecessors, (69), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-10 17:40:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2022-01-10 17:40:59,318 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 28 [2022-01-10 17:40:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:40:59,319 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2022-01-10 17:40:59,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 17:40:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2022-01-10 17:40:59,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 17:40:59,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:40:59,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 17:40:59,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 17:40:59,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:40:59,546 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:40:59,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:40:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1349804752, now seen corresponding path program 1 times [2022-01-10 17:40:59,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:40:59,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881792357] [2022-01-10 17:40:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:40:59,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:40:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:59,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 17:40:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:59,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 17:40:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 17:40:59,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:40:59,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881792357] [2022-01-10 17:40:59,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881792357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:40:59,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147086969] [2022-01-10 17:40:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:40:59,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:40:59,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:40:59,690 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 17:40:59,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 17:40:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:40:59,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 17:40:59,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:40:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 17:40:59,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 17:40:59,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147086969] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:40:59,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 17:40:59,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2022-01-10 17:40:59,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070128110] [2022-01-10 17:40:59,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:40:59,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 17:40:59,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:40:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 17:40:59,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 17:40:59,927 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 17:40:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:40:59,959 INFO L93 Difference]: Finished difference Result 114 states and 156 transitions. [2022-01-10 17:40:59,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 17:40:59,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-01-10 17:40:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:40:59,962 INFO L225 Difference]: With dead ends: 114 [2022-01-10 17:40:59,962 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 17:40:59,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 17:40:59,965 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 1 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 17:40:59,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 202 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 17:40:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 17:40:59,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-01-10 17:40:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 56 states have internal predecessors, (70), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2022-01-10 17:40:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 89 transitions. [2022-01-10 17:40:59,987 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 89 transitions. Word has length 30 [2022-01-10 17:40:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:40:59,987 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 89 transitions. [2022-01-10 17:40:59,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 17:40:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 89 transitions. [2022-01-10 17:40:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 17:40:59,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:40:59,991 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] [2022-01-10 17:41:00,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 17:41:00,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:41:00,192 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:00,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:00,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1174107104, now seen corresponding path program 1 times [2022-01-10 17:41:00,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:00,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547177388] [2022-01-10 17:41:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:00,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:00,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:00,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-10 17:41:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 17:41:00,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:00,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547177388] [2022-01-10 17:41:00,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547177388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:41:00,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:41:00,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 17:41:00,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089694361] [2022-01-10 17:41:00,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:41:00,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 17:41:00,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:00,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 17:41:00,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 17:41:00,274 INFO L87 Difference]: Start difference. First operand 63 states and 89 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 17:41:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:00,296 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2022-01-10 17:41:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 17:41:00,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-01-10 17:41:00,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:00,297 INFO L225 Difference]: With dead ends: 67 [2022-01-10 17:41:00,297 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 17:41:00,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 17:41:00,298 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:00,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 176 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 17:41:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 17:41:00,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-01-10 17:41:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 48 states have internal predecessors, (61), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-10 17:41:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2022-01-10 17:41:00,307 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 31 [2022-01-10 17:41:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:00,307 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2022-01-10 17:41:00,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 17:41:00,308 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2022-01-10 17:41:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 17:41:00,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:00,309 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 17:41:00,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 17:41:00,309 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:00,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:00,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1346828331, now seen corresponding path program 1 times [2022-01-10 17:41:00,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:00,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36622351] [2022-01-10 17:41:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:00,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:00,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:00,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-10 17:41:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 17:41:00,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:00,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36622351] [2022-01-10 17:41:00,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36622351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:41:00,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:41:00,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 17:41:00,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959614389] [2022-01-10 17:41:00,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:41:00,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 17:41:00,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 17:41:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 17:41:00,519 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 17:41:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:00,628 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2022-01-10 17:41:00,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 17:41:00,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-01-10 17:41:00,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:00,637 INFO L225 Difference]: With dead ends: 94 [2022-01-10 17:41:00,637 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 17:41:00,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 17:41:00,638 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:00,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 140 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 17:41:00,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 17:41:00,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-10 17:41:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 40 states have internal predecessors, (49), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 17:41:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2022-01-10 17:41:00,644 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 32 [2022-01-10 17:41:00,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:00,644 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2022-01-10 17:41:00,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 17:41:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2022-01-10 17:41:00,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 17:41:00,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:00,645 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 17:41:00,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 17:41:00,646 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash -776107193, now seen corresponding path program 1 times [2022-01-10 17:41:00,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:00,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606508622] [2022-01-10 17:41:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:00,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:00,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 17:41:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:00,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:00,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-10 17:41:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 17:41:00,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:00,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606508622] [2022-01-10 17:41:00,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606508622] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:41:00,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:41:00,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 17:41:00,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309228377] [2022-01-10 17:41:00,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:41:00,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 17:41:00,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:00,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 17:41:00,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 17:41:00,820 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 17:41:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:00,882 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2022-01-10 17:41:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 17:41:00,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-01-10 17:41:00,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:00,884 INFO L225 Difference]: With dead ends: 53 [2022-01-10 17:41:00,884 INFO L226 Difference]: Without dead ends: 51 [2022-01-10 17:41:00,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-10 17:41:00,888 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 14 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:00,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 221 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 17:41:00,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-10 17:41:00,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-01-10 17:41:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 40 states have internal predecessors, (50), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 17:41:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-01-10 17:41:00,901 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 36 [2022-01-10 17:41:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:00,902 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-01-10 17:41:00,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 17:41:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-01-10 17:41:00,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 17:41:00,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:00,905 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2022-01-10 17:41:00,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 17:41:00,905 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:00,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:00,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1848763390, now seen corresponding path program 1 times [2022-01-10 17:41:00,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:00,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018021070] [2022-01-10 17:41:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:00,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:01,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 17:41:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:01,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:01,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-10 17:41:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:01,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 17:41:01,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:01,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018021070] [2022-01-10 17:41:01,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018021070] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:41:01,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805385424] [2022-01-10 17:41:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:01,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:41:01,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:41:01,561 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 17:41:01,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 17:41:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:01,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-10 17:41:01,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:41:01,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:01,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 17:41:01,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:01,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 17:41:01,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:01,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-10 17:41:01,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:01,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-10 17:41:02,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:02,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-10 17:41:02,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:02,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-10 17:41:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 17:41:02,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 17:41:02,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-01-10 17:41:02,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-01-10 17:41:03,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:03,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:03,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 65 [2022-01-10 17:41:03,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:03,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:03,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 50 [2022-01-10 17:41:03,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:03,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 58 [2022-01-10 17:41:03,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-10 17:41:03,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:03,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 60 [2022-01-10 17:41:03,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-10 17:41:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 17:41:03,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805385424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 17:41:03,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 17:41:03,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 16, 14] total 33 [2022-01-10 17:41:03,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943763190] [2022-01-10 17:41:03,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 17:41:03,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-10 17:41:03,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:03,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-10 17:41:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 17:41:03,578 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 33 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 32 states have internal predecessors, (72), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 17:41:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:04,587 INFO L93 Difference]: Finished difference Result 165 states and 222 transitions. [2022-01-10 17:41:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-10 17:41:04,588 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 32 states have internal predecessors, (72), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) Word has length 42 [2022-01-10 17:41:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:04,589 INFO L225 Difference]: With dead ends: 165 [2022-01-10 17:41:04,589 INFO L226 Difference]: Without dead ends: 126 [2022-01-10 17:41:04,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2022-01-10 17:41:04,591 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 274 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:04,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 958 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 298 Invalid, 0 Unknown, 200 Unchecked, 0.4s Time] [2022-01-10 17:41:04,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-10 17:41:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 66. [2022-01-10 17:41:04,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 55 states have internal predecessors, (68), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-10 17:41:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2022-01-10 17:41:04,603 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 42 [2022-01-10 17:41:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:04,603 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2022-01-10 17:41:04,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 32 states have internal predecessors, (72), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-10 17:41:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2022-01-10 17:41:04,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 17:41:04,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:04,604 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2022-01-10 17:41:04,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 17:41:04,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:41:04,819 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:04,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2060114303, now seen corresponding path program 1 times [2022-01-10 17:41:04,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:04,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186143098] [2022-01-10 17:41:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:04,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:05,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 17:41:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:05,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:05,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-10 17:41:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:05,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 17:41:05,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:05,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186143098] [2022-01-10 17:41:05,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186143098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:41:05,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415034915] [2022-01-10 17:41:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:05,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:41:05,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:41:05,848 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 17:41:05,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 17:41:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 77 conjunts are in the unsatisfiable core [2022-01-10 17:41:06,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:41:06,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:06,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 17:41:06,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:06,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 17:41:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:06,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-01-10 17:41:06,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:06,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 17:41:07,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:07,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:07,045 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-01-10 17:41:07,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 43 [2022-01-10 17:41:07,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2022-01-10 17:41:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 17:41:10,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 17:41:11,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:11,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:11,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 230 treesize of output 205 [2022-01-10 17:41:11,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:11,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:11,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 234 treesize of output 134 [2022-01-10 17:41:11,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:11,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 952 treesize of output 926 [2022-01-10 17:41:11,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:11,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1230 treesize of output 1162 [2022-01-10 17:41:11,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1154 treesize of output 1126 [2022-01-10 17:41:11,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:11,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:11,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 1476 treesize of output 1280 [2022-01-10 17:41:12,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-01-10 17:41:12,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-01-10 17:41:12,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-01-10 17:41:12,693 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-01-10 17:41:12,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-01-10 17:41:13,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-01-10 17:41:14,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-01-10 17:41:14,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-01-10 17:41:14,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-01-10 17:41:14,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:15,502 INFO L353 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2022-01-10 17:41:15,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 401 treesize of output 377 [2022-01-10 17:41:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 17:41:18,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415034915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 17:41:18,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 17:41:18,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15] total 42 [2022-01-10 17:41:18,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752321712] [2022-01-10 17:41:18,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 17:41:18,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-10 17:41:18,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-10 17:41:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1575, Unknown=6, NotChecked=0, Total=1722 [2022-01-10 17:41:18,037 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand has 42 states, 39 states have (on average 2.0) internal successors, (78), 41 states have internal predecessors, (78), 11 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-10 17:41:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:24,352 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2022-01-10 17:41:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 17:41:24,352 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 2.0) internal successors, (78), 41 states have internal predecessors, (78), 11 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) Word has length 42 [2022-01-10 17:41:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:24,354 INFO L225 Difference]: With dead ends: 171 [2022-01-10 17:41:24,354 INFO L226 Difference]: Without dead ends: 125 [2022-01-10 17:41:24,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=381, Invalid=4026, Unknown=15, NotChecked=0, Total=4422 [2022-01-10 17:41:24,357 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 182 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:24,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 802 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 527 Invalid, 0 Unknown, 235 Unchecked, 0.8s Time] [2022-01-10 17:41:24,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-10 17:41:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 99. [2022-01-10 17:41:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 81 states have internal predecessors, (96), 9 states have call successors, (9), 7 states have call predecessors, (9), 11 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2022-01-10 17:41:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2022-01-10 17:41:24,372 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 42 [2022-01-10 17:41:24,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:24,372 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2022-01-10 17:41:24,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 2.0) internal successors, (78), 41 states have internal predecessors, (78), 11 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-10 17:41:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2022-01-10 17:41:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 17:41:24,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:24,373 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 17:41:24,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 17:41:24,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:41:24,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash -64349558, now seen corresponding path program 1 times [2022-01-10 17:41:24,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:24,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568632468] [2022-01-10 17:41:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:24,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:24,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 17:41:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:24,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:24,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 17:41:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 17:41:24,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:24,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568632468] [2022-01-10 17:41:24,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568632468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:41:24,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819911659] [2022-01-10 17:41:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:24,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:41:24,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:41:24,685 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 17:41:24,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 17:41:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:24,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 17:41:24,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:41:24,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-10 17:41:24,912 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-10 17:41:24,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2022-01-10 17:41:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 17:41:24,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 17:41:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 17:41:25,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819911659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 17:41:25,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 17:41:25,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-10 17:41:25,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636648217] [2022-01-10 17:41:25,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 17:41:25,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 17:41:25,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 17:41:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-01-10 17:41:25,051 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-10 17:41:25,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:25,157 INFO L93 Difference]: Finished difference Result 124 states and 156 transitions. [2022-01-10 17:41:25,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 17:41:25,157 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2022-01-10 17:41:25,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:25,158 INFO L225 Difference]: With dead ends: 124 [2022-01-10 17:41:25,158 INFO L226 Difference]: Without dead ends: 92 [2022-01-10 17:41:25,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-01-10 17:41:25,159 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 132 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:25,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 148 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 17:41:25,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-10 17:41:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-01-10 17:41:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 71 states have internal predecessors, (85), 8 states have call successors, (8), 7 states have call predecessors, (8), 10 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-01-10 17:41:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 110 transitions. [2022-01-10 17:41:25,171 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 110 transitions. Word has length 42 [2022-01-10 17:41:25,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:25,171 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 110 transitions. [2022-01-10 17:41:25,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-10 17:41:25,172 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 110 transitions. [2022-01-10 17:41:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 17:41:25,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:25,172 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2022-01-10 17:41:25,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 17:41:25,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 17:41:25,384 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:25,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1869121874, now seen corresponding path program 1 times [2022-01-10 17:41:25,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:25,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083144979] [2022-01-10 17:41:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:25,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:25,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 17:41:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:25,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:25,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-10 17:41:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:25,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-10 17:41:25,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:25,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083144979] [2022-01-10 17:41:25,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083144979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 17:41:25,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 17:41:25,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 17:41:25,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554317862] [2022-01-10 17:41:25,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 17:41:25,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 17:41:25,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:25,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 17:41:25,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 17:41:25,505 INFO L87 Difference]: Start difference. First operand 89 states and 110 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 17:41:25,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:25,571 INFO L93 Difference]: Finished difference Result 110 states and 137 transitions. [2022-01-10 17:41:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 17:41:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-01-10 17:41:25,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:25,574 INFO L225 Difference]: With dead ends: 110 [2022-01-10 17:41:25,574 INFO L226 Difference]: Without dead ends: 108 [2022-01-10 17:41:25,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 17:41:25,577 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:25,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 256 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 17:41:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-10 17:41:25,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2022-01-10 17:41:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 75 states have internal predecessors, (88), 8 states have call successors, (8), 7 states have call predecessors, (8), 12 states have return successors, (23), 11 states have call predecessors, (23), 8 states have call successors, (23) [2022-01-10 17:41:25,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2022-01-10 17:41:25,594 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 43 [2022-01-10 17:41:25,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:25,596 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2022-01-10 17:41:25,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-10 17:41:25,596 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2022-01-10 17:41:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 17:41:25,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:25,597 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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] [2022-01-10 17:41:25,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 17:41:25,597 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:25,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1386558423, now seen corresponding path program 2 times [2022-01-10 17:41:25,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:25,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999105121] [2022-01-10 17:41:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:25,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:26,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-10 17:41:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:26,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:26,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-10 17:41:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:26,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:27,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 17:41:27,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:27,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999105121] [2022-01-10 17:41:27,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999105121] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:41:27,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075115462] [2022-01-10 17:41:27,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 17:41:27,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:41:27,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:41:27,072 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 17:41:27,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 17:41:27,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 17:41:27,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 17:41:27,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 132 conjunts are in the unsatisfiable core [2022-01-10 17:41:27,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:41:27,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:27,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-01-10 17:41:27,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:27,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-01-10 17:41:27,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:27,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:27,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 43 [2022-01-10 17:41:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:27,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2022-01-10 17:41:27,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 15 [2022-01-10 17:41:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:27,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-01-10 17:41:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:27,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:27,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2022-01-10 17:41:28,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:28,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:28,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:28,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:28,527 INFO L353 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-01-10 17:41:28,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 86 [2022-01-10 17:41:28,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:28,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 17:41:28,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 17:41:28,536 INFO L353 Elim1Store]: treesize reduction 39, result has 2.5 percent of original size [2022-01-10 17:41:28,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 82 [2022-01-10 17:41:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 17:41:30,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 17:41:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 17:41:40,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075115462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 17:41:40,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 17:41:40,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 20] total 54 [2022-01-10 17:41:40,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710391700] [2022-01-10 17:41:40,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 17:41:40,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-10 17:41:40,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-10 17:41:40,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2642, Unknown=5, NotChecked=0, Total=2862 [2022-01-10 17:41:40,575 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 53 states have internal predecessors, (91), 14 states have call successors, (14), 3 states have call predecessors, (14), 10 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-10 17:41:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:53,631 INFO L93 Difference]: Finished difference Result 349 states and 484 transitions. [2022-01-10 17:41:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-10 17:41:53,631 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 53 states have internal predecessors, (91), 14 states have call successors, (14), 3 states have call predecessors, (14), 10 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) Word has length 49 [2022-01-10 17:41:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:53,634 INFO L225 Difference]: With dead ends: 349 [2022-01-10 17:41:53,634 INFO L226 Difference]: Without dead ends: 270 [2022-01-10 17:41:53,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2678 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=759, Invalid=9537, Unknown=6, NotChecked=0, Total=10302 [2022-01-10 17:41:53,637 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 363 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 2115 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:53,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 2115 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1994 Invalid, 0 Unknown, 368 Unchecked, 3.6s Time] [2022-01-10 17:41:53,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-01-10 17:41:53,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 179. [2022-01-10 17:41:53,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 141 states have (on average 1.2127659574468086) internal successors, (171), 147 states have internal predecessors, (171), 17 states have call successors, (17), 9 states have call predecessors, (17), 19 states have return successors, (55), 22 states have call predecessors, (55), 17 states have call successors, (55) [2022-01-10 17:41:53,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 243 transitions. [2022-01-10 17:41:53,669 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 243 transitions. Word has length 49 [2022-01-10 17:41:53,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:53,669 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 243 transitions. [2022-01-10 17:41:53,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 53 states have internal predecessors, (91), 14 states have call successors, (14), 3 states have call predecessors, (14), 10 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-10 17:41:53,670 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 243 transitions. [2022-01-10 17:41:53,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 17:41:53,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:53,671 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2022-01-10 17:41:53,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 17:41:53,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:41:53,873 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:53,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash 359108921, now seen corresponding path program 1 times [2022-01-10 17:41:53,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:53,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383816181] [2022-01-10 17:41:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:53,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:54,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-10 17:41:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:54,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:54,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 17:41:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:54,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:54,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 17:41:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 17:41:54,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 17:41:54,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383816181] [2022-01-10 17:41:54,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383816181] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 17:41:54,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914965418] [2022-01-10 17:41:54,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:54,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:41:54,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 17:41:54,648 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 17:41:54,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 17:41:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 17:41:54,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-10 17:41:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 17:41:55,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-10 17:41:55,065 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-10 17:41:55,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2022-01-10 17:41:55,108 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-10 17:41:55,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2022-01-10 17:41:55,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-10 17:41:55,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-10 17:41:55,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 17:41:55,200 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 17:41:55,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2022-01-10 17:41:55,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-01-10 17:41:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-10 17:41:55,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 17:41:55,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 17:41:55,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 147 [2022-01-10 17:41:55,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 172 [2022-01-10 17:41:55,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 166 [2022-01-10 17:41:55,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-01-10 17:41:55,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-01-10 17:41:55,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-10 17:41:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 17:41:55,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914965418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 17:41:55,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 17:41:55,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-01-10 17:41:55,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913705633] [2022-01-10 17:41:55,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 17:41:55,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-10 17:41:55,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 17:41:55,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-10 17:41:55,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-01-10 17:41:55,976 INFO L87 Difference]: Start difference. First operand 179 states and 243 transitions. Second operand has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 25 states have internal predecessors, (68), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-10 17:41:56,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 17:41:56,931 INFO L93 Difference]: Finished difference Result 322 states and 452 transitions. [2022-01-10 17:41:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 17:41:56,932 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 25 states have internal predecessors, (68), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) Word has length 55 [2022-01-10 17:41:56,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 17:41:56,934 INFO L225 Difference]: With dead ends: 322 [2022-01-10 17:41:56,934 INFO L226 Difference]: Without dead ends: 236 [2022-01-10 17:41:56,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 102 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 17:41:56,935 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 241 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 17:41:56,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 596 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 566 Invalid, 0 Unknown, 58 Unchecked, 0.6s Time] [2022-01-10 17:41:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-10 17:41:56,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 188. [2022-01-10 17:41:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 147 states have (on average 1.217687074829932) internal successors, (179), 155 states have internal predecessors, (179), 18 states have call successors, (18), 9 states have call predecessors, (18), 21 states have return successors, (59), 23 states have call predecessors, (59), 18 states have call successors, (59) [2022-01-10 17:41:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 256 transitions. [2022-01-10 17:41:56,963 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 256 transitions. Word has length 55 [2022-01-10 17:41:56,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 17:41:56,964 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 256 transitions. [2022-01-10 17:41:56,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 25 states have internal predecessors, (68), 8 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-10 17:41:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 256 transitions. [2022-01-10 17:41:56,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-10 17:41:56,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 17:41:56,965 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2022-01-10 17:41:56,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-10 17:41:57,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 17:41:57,170 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 17:41:57,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 17:41:57,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1328689944, now seen corresponding path program 2 times [2022-01-10 17:41:57,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 17:41:57,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783225835] [2022-01-10 17:41:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 17:41:57,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 17:41:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat