/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread-nondet/nondet-array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 02:31:29,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 02:31:29,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 02:31:29,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 02:31:29,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 02:31:29,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 02:31:29,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 02:31:29,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 02:31:29,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 02:31:29,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 02:31:29,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 02:31:29,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 02:31:29,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 02:31:29,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 02:31:29,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 02:31:29,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 02:31:29,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 02:31:29,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 02:31:29,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 02:31:29,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 02:31:29,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 02:31:29,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 02:31:29,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 02:31:29,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 02:31:29,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 02:31:29,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 02:31:29,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 02:31:29,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 02:31:29,369 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2020-10-16 02:31:29,390 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 02:31:29,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 02:31:29,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 02:31:29,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 02:31:29,392 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 02:31:29,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 02:31:29,393 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 02:31:29,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 02:31:29,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 02:31:29,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 02:31:29,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 02:31:29,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 02:31:29,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 02:31:29,394 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 02:31:29,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 02:31:29,394 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 02:31:29,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 02:31:29,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 02:31:29,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 02:31:29,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 02:31:29,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 02:31:29,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 02:31:29,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 02:31:29,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 02:31:29,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 02:31:29,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 02:31:29,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 02:31:29,397 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 02:31:29,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 02:31:29,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 02:31:29,724 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 02:31:29,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 02:31:29,728 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 02:31:29,729 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 02:31:29,729 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-array-2.i [2020-10-16 02:31:29,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d7aa9046/e26952f45ca5494493f4c237bbeb27b8/FLAG72c9134d7 [2020-10-16 02:31:30,237 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 02:31:30,237 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-nondet/nondet-array-2.i [2020-10-16 02:31:30,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d7aa9046/e26952f45ca5494493f4c237bbeb27b8/FLAG72c9134d7 [2020-10-16 02:31:30,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d7aa9046/e26952f45ca5494493f4c237bbeb27b8 [2020-10-16 02:31:30,545 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 02:31:30,547 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 02:31:30,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 02:31:30,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 02:31:30,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 02:31:30,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:31:30" (1/1) ... [2020-10-16 02:31:30,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a67d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:30, skipping insertion in model container [2020-10-16 02:31:30,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:31:30" (1/1) ... [2020-10-16 02:31:30,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 02:31:30,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 02:31:31,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 02:31:31,167 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 02:31:31,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 02:31:31,289 INFO L208 MainTranslator]: Completed translation [2020-10-16 02:31:31,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:31 WrapperNode [2020-10-16 02:31:31,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 02:31:31,291 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 02:31:31,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 02:31:31,291 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 02:31:31,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:31" (1/1) ... [2020-10-16 02:31:31,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:31" (1/1) ... [2020-10-16 02:31:31,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 02:31:31,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 02:31:31,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 02:31:31,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 02:31:31,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:31" (1/1) ... [2020-10-16 02:31:31,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:31" (1/1) ... [2020-10-16 02:31:31,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:31" (1/1) ... [2020-10-16 02:31:31,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:31" (1/1) ... [2020-10-16 02:31:31,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:31" (1/1) ... [2020-10-16 02:31:31,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:31" (1/1) ... [2020-10-16 02:31:31,373 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:31" (1/1) ... [2020-10-16 02:31:31,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 02:31:31,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 02:31:31,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 02:31:31,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 02:31:31,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 02:31:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-16 02:31:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 02:31:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 02:31:31,451 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2020-10-16 02:31:31,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2020-10-16 02:31:31,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 02:31:31,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 02:31:31,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 02:31:31,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 02:31:31,454 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 02:31:31,847 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 02:31:31,847 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-16 02:31:31,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:31:31 BoogieIcfgContainer [2020-10-16 02:31:31,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 02:31:31,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 02:31:31,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 02:31:31,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 02:31:31,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:31:30" (1/3) ... [2020-10-16 02:31:31,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a68b6d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:31:31, skipping insertion in model container [2020-10-16 02:31:31,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:31" (2/3) ... [2020-10-16 02:31:31,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a68b6d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:31:31, skipping insertion in model container [2020-10-16 02:31:31,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:31:31" (3/3) ... [2020-10-16 02:31:31,859 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-array-2.i [2020-10-16 02:31:31,872 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 02:31:31,881 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 02:31:31,882 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 02:31:31,907 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,907 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,907 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,908 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,911 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,912 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,912 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,915 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,916 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,916 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,916 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,917 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:31,945 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:31,969 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:31,969 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:31,970 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:31,970 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:31,970 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:31,970 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:31,970 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:31,970 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:31,985 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 71 transitions, 150 flow [2020-10-16 02:31:32,037 INFO L129 PetriNetUnfolder]: 12/103 cut-off events. [2020-10-16 02:31:32,038 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:31:32,042 INFO L80 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 103 events. 12/103 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2020-10-16 02:31:32,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 71 transitions, 150 flow [2020-10-16 02:31:32,049 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 64 transitions, 136 flow [2020-10-16 02:31:32,052 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:32,055 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 64 transitions, 136 flow [2020-10-16 02:31:32,058 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 64 transitions, 136 flow [2020-10-16 02:31:32,059 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 64 transitions, 136 flow [2020-10-16 02:31:32,079 INFO L129 PetriNetUnfolder]: 10/89 cut-off events. [2020-10-16 02:31:32,079 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:31:32,080 INFO L80 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 89 events. 10/89 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 157 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2020-10-16 02:31:32,082 INFO L117 LiptonReduction]: Number of co-enabled transitions 300 [2020-10-16 02:31:33,516 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-16 02:31:33,836 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 02:31:33,933 INFO L132 LiptonReduction]: Checked pairs total: 320 [2020-10-16 02:31:33,933 INFO L134 LiptonReduction]: Total number of compositions: 56 [2020-10-16 02:31:33,936 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1886 [2020-10-16 02:31:33,942 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 02:31:33,943 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:33,943 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:33,944 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:33,944 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:33,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:33,950 INFO L82 PathProgramCache]: Analyzing trace with hash 8319830, now seen corresponding path program 1 times [2020-10-16 02:31:33,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:33,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572916737] [2020-10-16 02:31:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:34,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572916737] [2020-10-16 02:31:34,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:34,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:34,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829682990] [2020-10-16 02:31:34,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:34,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:34,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:34,169 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 127 [2020-10-16 02:31:34,171 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 13 transitions, 34 flow. Second operand 3 states. [2020-10-16 02:31:34,171 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:34,172 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 127 [2020-10-16 02:31:34,173 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:34,229 INFO L129 PetriNetUnfolder]: 2/18 cut-off events. [2020-10-16 02:31:34,230 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:31:34,230 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 18 events. 2/18 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 16. Up to 13 conditions per place. [2020-10-16 02:31:34,231 INFO L132 encePairwiseOnDemand]: 124/127 looper letters, 8 selfloop transitions, 2 changer transitions 0/14 dead transitions. [2020-10-16 02:31:34,231 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 14 transitions, 56 flow [2020-10-16 02:31:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2020-10-16 02:31:34,248 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5013123359580053 [2020-10-16 02:31:34,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 191 transitions. [2020-10-16 02:31:34,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 191 transitions. [2020-10-16 02:31:34,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:34,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 191 transitions. [2020-10-16 02:31:34,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:34,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:34,264 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:34,267 INFO L185 Difference]: Start difference. First operand has 14 places, 13 transitions, 34 flow. Second operand 3 states and 191 transitions. [2020-10-16 02:31:34,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 14 transitions, 56 flow [2020-10-16 02:31:34,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:34,273 INFO L241 Difference]: Finished difference. Result has 17 places, 13 transitions, 42 flow [2020-10-16 02:31:34,275 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=17, PETRI_TRANSITIONS=13} [2020-10-16 02:31:34,277 INFO L342 CegarLoopForPetriNet]: 14 programPoint places, 3 predicate places. [2020-10-16 02:31:34,277 INFO L481 AbstractCegarLoop]: Abstraction has has 17 places, 13 transitions, 42 flow [2020-10-16 02:31:34,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:34,277 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:34,277 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2020-10-16 02:31:34,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 02:31:34,278 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:34,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:34,278 INFO L82 PathProgramCache]: Analyzing trace with hash -603160687, now seen corresponding path program 1 times [2020-10-16 02:31:34,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:34,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060433241] [2020-10-16 02:31:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:34,334 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:34,379 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:34,402 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:34,403 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:34,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 02:31:34,404 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:34,406 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:34,406 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-16 02:31:34,413 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,413 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,413 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,413 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,413 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,414 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,414 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,414 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,414 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,414 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,415 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,415 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,415 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,415 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,416 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,416 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,416 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,416 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,416 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,418 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,419 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,419 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,419 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,419 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:34,422 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:34,422 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:34,423 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:34,423 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:34,423 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:34,423 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:34,423 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:34,423 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:34,423 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:34,425 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2020-10-16 02:31:34,458 INFO L129 PetriNetUnfolder]: 23/183 cut-off events. [2020-10-16 02:31:34,458 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 02:31:34,459 INFO L80 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 183 events. 23/183 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 462 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2020-10-16 02:31:34,460 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 78 transitions, 174 flow [2020-10-16 02:31:34,461 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 71 transitions, 160 flow [2020-10-16 02:31:34,461 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:34,462 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 71 transitions, 160 flow [2020-10-16 02:31:34,462 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 71 transitions, 160 flow [2020-10-16 02:31:34,462 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 69 places, 71 transitions, 160 flow [2020-10-16 02:31:34,493 INFO L129 PetriNetUnfolder]: 19/155 cut-off events. [2020-10-16 02:31:34,493 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 02:31:34,493 INFO L80 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 155 events. 19/155 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 91. Up to 8 conditions per place. [2020-10-16 02:31:34,496 INFO L117 LiptonReduction]: Number of co-enabled transitions 760 [2020-10-16 02:31:35,644 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-16 02:31:35,820 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-16 02:31:35,988 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 02:31:35,994 INFO L132 LiptonReduction]: Checked pairs total: 1958 [2020-10-16 02:31:35,994 INFO L134 LiptonReduction]: Total number of compositions: 54 [2020-10-16 02:31:35,994 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1533 [2020-10-16 02:31:35,997 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 02:31:35,997 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:35,997 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:35,997 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:35,997 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:35,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:35,998 INFO L82 PathProgramCache]: Analyzing trace with hash 12600976, now seen corresponding path program 1 times [2020-10-16 02:31:35,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:35,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349432709] [2020-10-16 02:31:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:36,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349432709] [2020-10-16 02:31:36,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:36,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:36,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872386722] [2020-10-16 02:31:36,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:36,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:36,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:36,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:36,054 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 132 [2020-10-16 02:31:36,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 22 transitions, 62 flow. Second operand 3 states. [2020-10-16 02:31:36,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:36,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 132 [2020-10-16 02:31:36,055 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:36,090 INFO L129 PetriNetUnfolder]: 6/45 cut-off events. [2020-10-16 02:31:36,090 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 02:31:36,091 INFO L80 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 45 events. 6/45 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 45. Up to 26 conditions per place. [2020-10-16 02:31:36,091 INFO L132 encePairwiseOnDemand]: 129/132 looper letters, 9 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2020-10-16 02:31:36,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 24 transitions, 88 flow [2020-10-16 02:31:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2020-10-16 02:31:36,101 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2020-10-16 02:31:36,102 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2020-10-16 02:31:36,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2020-10-16 02:31:36,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:36,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2020-10-16 02:31:36,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:36,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:36,108 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:36,108 INFO L185 Difference]: Start difference. First operand has 24 places, 22 transitions, 62 flow. Second operand 3 states and 213 transitions. [2020-10-16 02:31:36,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 24 transitions, 88 flow [2020-10-16 02:31:36,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:36,112 INFO L241 Difference]: Finished difference. Result has 27 places, 23 transitions, 74 flow [2020-10-16 02:31:36,112 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2020-10-16 02:31:36,112 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2020-10-16 02:31:36,112 INFO L481 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 74 flow [2020-10-16 02:31:36,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:36,113 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:36,113 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:36,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 02:31:36,113 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:36,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:36,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1920961359, now seen corresponding path program 1 times [2020-10-16 02:31:36,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:36,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950746937] [2020-10-16 02:31:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:36,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950746937] [2020-10-16 02:31:36,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:36,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:36,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936926059] [2020-10-16 02:31:36,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:36,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:36,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:36,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:36,222 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 132 [2020-10-16 02:31:36,222 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 74 flow. Second operand 4 states. [2020-10-16 02:31:36,222 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:36,222 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 132 [2020-10-16 02:31:36,222 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:36,268 INFO L129 PetriNetUnfolder]: 5/49 cut-off events. [2020-10-16 02:31:36,268 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2020-10-16 02:31:36,269 INFO L80 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 49 events. 5/49 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 1 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 83. Up to 20 conditions per place. [2020-10-16 02:31:36,269 INFO L132 encePairwiseOnDemand]: 125/132 looper letters, 8 selfloop transitions, 6 changer transitions 0/27 dead transitions. [2020-10-16 02:31:36,269 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 110 flow [2020-10-16 02:31:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:36,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:36,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 284 transitions. [2020-10-16 02:31:36,274 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2020-10-16 02:31:36,274 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 284 transitions. [2020-10-16 02:31:36,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 284 transitions. [2020-10-16 02:31:36,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:36,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 284 transitions. [2020-10-16 02:31:36,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:36,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:36,278 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:36,278 INFO L185 Difference]: Start difference. First operand has 27 places, 23 transitions, 74 flow. Second operand 4 states and 284 transitions. [2020-10-16 02:31:36,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 110 flow [2020-10-16 02:31:36,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:36,287 INFO L241 Difference]: Finished difference. Result has 30 places, 25 transitions, 100 flow [2020-10-16 02:31:36,287 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2020-10-16 02:31:36,288 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 6 predicate places. [2020-10-16 02:31:36,288 INFO L481 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 100 flow [2020-10-16 02:31:36,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:36,289 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:36,289 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2020-10-16 02:31:36,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 02:31:36,290 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:36,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1347590472, now seen corresponding path program 1 times [2020-10-16 02:31:36,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:36,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547128228] [2020-10-16 02:31:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:36,334 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:36,361 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:36,377 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:36,378 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:36,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 02:31:36,381 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:36,382 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:36,383 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-16 02:31:36,392 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,393 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,393 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,393 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,393 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,393 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,394 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,394 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,395 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,395 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,395 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,396 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,396 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,396 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,396 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,397 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,397 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,397 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,397 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,397 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,397 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,398 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,398 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,398 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,399 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,399 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,400 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,401 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,401 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,401 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,401 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,404 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,404 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,404 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,404 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,404 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:36,407 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:36,408 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:36,408 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:36,408 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:36,408 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:36,408 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:36,409 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:36,409 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:36,409 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:36,411 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 200 flow [2020-10-16 02:31:36,446 INFO L129 PetriNetUnfolder]: 45/330 cut-off events. [2020-10-16 02:31:36,446 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 02:31:36,448 INFO L80 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 330 events. 45/330 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1084 event pairs, 1 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 191. Up to 16 conditions per place. [2020-10-16 02:31:36,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 85 transitions, 200 flow [2020-10-16 02:31:36,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 78 transitions, 186 flow [2020-10-16 02:31:36,451 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:36,451 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 78 transitions, 186 flow [2020-10-16 02:31:36,452 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 78 transitions, 186 flow [2020-10-16 02:31:36,452 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 77 places, 78 transitions, 186 flow [2020-10-16 02:31:36,487 INFO L129 PetriNetUnfolder]: 37/274 cut-off events. [2020-10-16 02:31:36,487 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 02:31:36,489 INFO L80 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 274 events. 37/274 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 784 event pairs, 1 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 163. Up to 16 conditions per place. [2020-10-16 02:31:36,493 INFO L117 LiptonReduction]: Number of co-enabled transitions 1260 [2020-10-16 02:31:37,762 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-10-16 02:31:38,076 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-16 02:31:38,180 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-16 02:31:38,347 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-16 02:31:38,425 INFO L132 LiptonReduction]: Checked pairs total: 3644 [2020-10-16 02:31:38,425 INFO L134 LiptonReduction]: Total number of compositions: 57 [2020-10-16 02:31:38,425 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1974 [2020-10-16 02:31:38,427 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 02:31:38,428 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:38,428 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:38,428 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:38,428 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:38,428 INFO L82 PathProgramCache]: Analyzing trace with hash 17184692, now seen corresponding path program 1 times [2020-10-16 02:31:38,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:38,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754871330] [2020-10-16 02:31:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:38,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754871330] [2020-10-16 02:31:38,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:38,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:38,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489352713] [2020-10-16 02:31:38,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:38,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:38,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:38,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:38,461 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 142 [2020-10-16 02:31:38,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 84 flow. Second operand 3 states. [2020-10-16 02:31:38,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:38,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 142 [2020-10-16 02:31:38,462 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:38,507 INFO L129 PetriNetUnfolder]: 15/85 cut-off events. [2020-10-16 02:31:38,507 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 02:31:38,508 INFO L80 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 85 events. 15/85 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 208 event pairs, 1 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 89. Up to 49 conditions per place. [2020-10-16 02:31:38,509 INFO L132 encePairwiseOnDemand]: 139/142 looper letters, 9 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2020-10-16 02:31:38,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 110 flow [2020-10-16 02:31:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2020-10-16 02:31:38,517 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5633802816901409 [2020-10-16 02:31:38,518 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2020-10-16 02:31:38,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2020-10-16 02:31:38,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:38,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2020-10-16 02:31:38,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:38,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:38,524 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:38,524 INFO L185 Difference]: Start difference. First operand has 30 places, 27 transitions, 84 flow. Second operand 3 states and 240 transitions. [2020-10-16 02:31:38,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 110 flow [2020-10-16 02:31:38,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:38,527 INFO L241 Difference]: Finished difference. Result has 33 places, 28 transitions, 96 flow [2020-10-16 02:31:38,528 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2020-10-16 02:31:38,528 INFO L342 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2020-10-16 02:31:38,528 INFO L481 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 96 flow [2020-10-16 02:31:38,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:38,529 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:38,529 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:38,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 02:31:38,530 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:38,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:38,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1206663488, now seen corresponding path program 1 times [2020-10-16 02:31:38,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:38,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322701415] [2020-10-16 02:31:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:38,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322701415] [2020-10-16 02:31:38,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:38,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:38,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003188685] [2020-10-16 02:31:38,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:38,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:38,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:38,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:38,604 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 142 [2020-10-16 02:31:38,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 96 flow. Second operand 4 states. [2020-10-16 02:31:38,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:38,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 142 [2020-10-16 02:31:38,605 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:38,646 INFO L129 PetriNetUnfolder]: 15/100 cut-off events. [2020-10-16 02:31:38,646 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2020-10-16 02:31:38,647 INFO L80 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 100 events. 15/100 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 280 event pairs, 4 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 181. Up to 44 conditions per place. [2020-10-16 02:31:38,647 INFO L132 encePairwiseOnDemand]: 135/142 looper letters, 8 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2020-10-16 02:31:38,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 132 flow [2020-10-16 02:31:38,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:38,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 320 transitions. [2020-10-16 02:31:38,650 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5633802816901409 [2020-10-16 02:31:38,650 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 320 transitions. [2020-10-16 02:31:38,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 320 transitions. [2020-10-16 02:31:38,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:38,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 320 transitions. [2020-10-16 02:31:38,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:38,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:38,653 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:38,653 INFO L185 Difference]: Start difference. First operand has 33 places, 28 transitions, 96 flow. Second operand 4 states and 320 transitions. [2020-10-16 02:31:38,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 132 flow [2020-10-16 02:31:38,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:38,655 INFO L241 Difference]: Finished difference. Result has 36 places, 30 transitions, 122 flow [2020-10-16 02:31:38,655 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2020-10-16 02:31:38,656 INFO L342 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2020-10-16 02:31:38,656 INFO L481 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 122 flow [2020-10-16 02:31:38,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:38,656 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:38,656 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2020-10-16 02:31:38,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 02:31:38,657 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:38,657 INFO L82 PathProgramCache]: Analyzing trace with hash 703601145, now seen corresponding path program 1 times [2020-10-16 02:31:38,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:38,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615878521] [2020-10-16 02:31:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:38,671 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:38,684 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:38,690 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:38,691 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:38,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-16 02:31:38,691 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:38,692 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:38,692 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-16 02:31:38,700 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,700 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,700 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,700 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,701 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,701 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,701 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,701 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,701 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,701 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,701 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,702 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,702 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,702 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,702 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,702 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,703 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,703 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,703 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,703 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,703 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,704 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,704 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,704 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,704 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,704 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,704 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,705 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,705 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,705 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,705 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,705 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,706 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,707 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,708 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,708 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,708 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,708 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,709 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,710 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,710 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,710 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,710 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,714 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,715 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,715 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,715 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,715 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:38,719 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:38,719 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:38,720 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:38,720 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:38,720 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:38,720 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:38,720 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:38,720 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:38,720 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:38,722 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 228 flow [2020-10-16 02:31:38,783 INFO L129 PetriNetUnfolder]: 91/613 cut-off events. [2020-10-16 02:31:38,783 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 02:31:38,785 INFO L80 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 613 events. 91/613 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2762 event pairs, 6 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 350. Up to 32 conditions per place. [2020-10-16 02:31:38,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 92 transitions, 228 flow [2020-10-16 02:31:38,788 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 85 transitions, 214 flow [2020-10-16 02:31:38,788 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:38,788 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 85 transitions, 214 flow [2020-10-16 02:31:38,788 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 85 transitions, 214 flow [2020-10-16 02:31:38,789 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 85 transitions, 214 flow [2020-10-16 02:31:38,840 INFO L129 PetriNetUnfolder]: 75/501 cut-off events. [2020-10-16 02:31:38,840 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 02:31:38,842 INFO L80 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 501 events. 75/501 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2027 event pairs, 6 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 294. Up to 32 conditions per place. [2020-10-16 02:31:38,852 INFO L117 LiptonReduction]: Number of co-enabled transitions 1840 [2020-10-16 02:31:40,130 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-16 02:31:40,400 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 02:31:40,490 INFO L132 LiptonReduction]: Checked pairs total: 6546 [2020-10-16 02:31:40,490 INFO L134 LiptonReduction]: Total number of compositions: 59 [2020-10-16 02:31:40,491 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1703 [2020-10-16 02:31:40,492 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 02:31:40,493 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:40,493 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:40,493 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:40,493 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:40,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:40,494 INFO L82 PathProgramCache]: Analyzing trace with hash 22048377, now seen corresponding path program 1 times [2020-10-16 02:31:40,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:40,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727495026] [2020-10-16 02:31:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:40,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727495026] [2020-10-16 02:31:40,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:40,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:40,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511117460] [2020-10-16 02:31:40,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:40,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:40,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:40,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:40,523 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 151 [2020-10-16 02:31:40,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 108 flow. Second operand 3 states. [2020-10-16 02:31:40,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:40,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 151 [2020-10-16 02:31:40,523 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:40,576 INFO L129 PetriNetUnfolder]: 36/161 cut-off events. [2020-10-16 02:31:40,576 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 02:31:40,577 INFO L80 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 161 events. 36/161 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 514 event pairs, 6 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 166. Up to 92 conditions per place. [2020-10-16 02:31:40,578 INFO L132 encePairwiseOnDemand]: 148/151 looper letters, 9 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2020-10-16 02:31:40,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 134 flow [2020-10-16 02:31:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2020-10-16 02:31:40,580 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5761589403973509 [2020-10-16 02:31:40,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2020-10-16 02:31:40,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2020-10-16 02:31:40,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:40,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2020-10-16 02:31:40,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:40,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:40,583 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:40,583 INFO L185 Difference]: Start difference. First operand has 36 places, 32 transitions, 108 flow. Second operand 3 states and 261 transitions. [2020-10-16 02:31:40,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 134 flow [2020-10-16 02:31:40,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:40,586 INFO L241 Difference]: Finished difference. Result has 39 places, 33 transitions, 120 flow [2020-10-16 02:31:40,586 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2020-10-16 02:31:40,586 INFO L342 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2020-10-16 02:31:40,586 INFO L481 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 120 flow [2020-10-16 02:31:40,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:40,587 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:40,587 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:40,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 02:31:40,587 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash -161501305, now seen corresponding path program 1 times [2020-10-16 02:31:40,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:40,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124860718] [2020-10-16 02:31:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:40,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124860718] [2020-10-16 02:31:40,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:40,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:40,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448473443] [2020-10-16 02:31:40,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:40,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:40,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:40,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:40,622 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 151 [2020-10-16 02:31:40,622 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 120 flow. Second operand 4 states. [2020-10-16 02:31:40,622 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:40,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 151 [2020-10-16 02:31:40,623 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:40,689 INFO L129 PetriNetUnfolder]: 38/194 cut-off events. [2020-10-16 02:31:40,689 INFO L130 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2020-10-16 02:31:40,690 INFO L80 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 194 events. 38/194 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 756 event pairs, 12 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 361. Up to 89 conditions per place. [2020-10-16 02:31:40,691 INFO L132 encePairwiseOnDemand]: 144/151 looper letters, 8 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2020-10-16 02:31:40,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 156 flow [2020-10-16 02:31:40,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:40,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2020-10-16 02:31:40,694 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5761589403973509 [2020-10-16 02:31:40,694 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 348 transitions. [2020-10-16 02:31:40,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 348 transitions. [2020-10-16 02:31:40,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:40,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 348 transitions. [2020-10-16 02:31:40,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:40,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:40,697 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:40,698 INFO L185 Difference]: Start difference. First operand has 39 places, 33 transitions, 120 flow. Second operand 4 states and 348 transitions. [2020-10-16 02:31:40,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 156 flow [2020-10-16 02:31:40,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:40,705 INFO L241 Difference]: Finished difference. Result has 42 places, 35 transitions, 146 flow [2020-10-16 02:31:40,705 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2020-10-16 02:31:40,705 INFO L342 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2020-10-16 02:31:40,706 INFO L481 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 146 flow [2020-10-16 02:31:40,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:40,706 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:40,706 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:40,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 02:31:40,707 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash -582908876, now seen corresponding path program 1 times [2020-10-16 02:31:40,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:40,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101976952] [2020-10-16 02:31:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:40,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101976952] [2020-10-16 02:31:40,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430950562] [2020-10-16 02:31:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:40,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:31:40,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:40,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:40,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:31:40,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208195474] [2020-10-16 02:31:40,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:31:40,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:40,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:31:40,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:31:40,914 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 151 [2020-10-16 02:31:40,914 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 146 flow. Second operand 6 states. [2020-10-16 02:31:40,914 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:40,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 151 [2020-10-16 02:31:40,915 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:40,965 INFO L129 PetriNetUnfolder]: 37/189 cut-off events. [2020-10-16 02:31:40,966 INFO L130 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2020-10-16 02:31:40,966 INFO L80 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 189 events. 37/189 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 743 event pairs, 12 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 254. Up to 108 conditions per place. [2020-10-16 02:31:40,967 INFO L132 encePairwiseOnDemand]: 148/151 looper letters, 12 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2020-10-16 02:31:40,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 184 flow [2020-10-16 02:31:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2020-10-16 02:31:40,970 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5728476821192053 [2020-10-16 02:31:40,970 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 346 transitions. [2020-10-16 02:31:40,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 346 transitions. [2020-10-16 02:31:40,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:40,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 346 transitions. [2020-10-16 02:31:40,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:40,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:40,973 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:40,973 INFO L185 Difference]: Start difference. First operand has 42 places, 35 transitions, 146 flow. Second operand 4 states and 346 transitions. [2020-10-16 02:31:40,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 184 flow [2020-10-16 02:31:40,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:40,976 INFO L241 Difference]: Finished difference. Result has 45 places, 36 transitions, 161 flow [2020-10-16 02:31:40,976 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2020-10-16 02:31:40,977 INFO L342 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2020-10-16 02:31:40,977 INFO L481 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 161 flow [2020-10-16 02:31:40,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:31:40,977 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:40,977 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:41,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 02:31:41,191 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:41,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:41,191 INFO L82 PathProgramCache]: Analyzing trace with hash -653450535, now seen corresponding path program 1 times [2020-10-16 02:31:41,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:41,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962144377] [2020-10-16 02:31:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:41,204 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:41,215 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:41,225 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:41,225 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:41,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-16 02:31:41,226 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:41,227 WARN L371 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:41,229 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-16 02:31:41,243 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,244 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,244 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,244 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,244 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,244 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,245 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,245 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,245 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,245 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,245 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,245 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,246 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,246 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,247 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,247 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,247 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,247 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,248 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,248 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,248 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,249 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,249 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,249 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,249 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,250 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,250 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,250 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,250 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,250 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,250 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,251 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,251 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,251 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,251 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,252 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,254 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,254 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,254 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,255 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,256 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,256 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,257 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,257 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,257 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,258 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,258 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,259 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,259 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,259 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,260 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,261 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,261 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,261 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,261 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,263 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,263 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,263 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,263 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,263 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:41,269 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:41,269 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:41,269 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:41,269 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:41,269 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:41,269 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:41,270 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:41,270 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:41,270 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:41,273 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 258 flow [2020-10-16 02:31:41,422 INFO L129 PetriNetUnfolder]: 189/1172 cut-off events. [2020-10-16 02:31:41,422 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 02:31:41,426 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 1172 events. 189/1172 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6756 event pairs, 23 based on Foata normal form. 0/967 useless extension candidates. Maximal degree in co-relation 658. Up to 80 conditions per place. [2020-10-16 02:31:41,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 99 transitions, 258 flow [2020-10-16 02:31:41,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 92 transitions, 244 flow [2020-10-16 02:31:41,433 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:41,433 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 92 transitions, 244 flow [2020-10-16 02:31:41,433 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 92 transitions, 244 flow [2020-10-16 02:31:41,434 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 92 transitions, 244 flow [2020-10-16 02:31:41,546 INFO L129 PetriNetUnfolder]: 157/948 cut-off events. [2020-10-16 02:31:41,546 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 02:31:41,549 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 948 events. 157/948 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4980 event pairs, 23 based on Foata normal form. 0/807 useless extension candidates. Maximal degree in co-relation 546. Up to 80 conditions per place. [2020-10-16 02:31:41,575 INFO L117 LiptonReduction]: Number of co-enabled transitions 2500 [2020-10-16 02:31:43,201 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-16 02:31:43,362 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 02:31:43,374 INFO L132 LiptonReduction]: Checked pairs total: 8810 [2020-10-16 02:31:43,374 INFO L134 LiptonReduction]: Total number of compositions: 59 [2020-10-16 02:31:43,374 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1941 [2020-10-16 02:31:43,376 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 02:31:43,376 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:43,376 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:43,376 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:43,377 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:43,377 INFO L82 PathProgramCache]: Analyzing trace with hash 27129011, now seen corresponding path program 1 times [2020-10-16 02:31:43,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:43,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63292717] [2020-10-16 02:31:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:43,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63292717] [2020-10-16 02:31:43,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:43,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:43,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391200337] [2020-10-16 02:31:43,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:43,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:43,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:43,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:43,415 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 02:31:43,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 134 flow. Second operand 3 states. [2020-10-16 02:31:43,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:43,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 02:31:43,416 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:43,476 INFO L129 PetriNetUnfolder]: 85/313 cut-off events. [2020-10-16 02:31:43,476 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 02:31:43,477 INFO L80 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 313 events. 85/313 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1219 event pairs, 23 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 312. Up to 175 conditions per place. [2020-10-16 02:31:43,479 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 9 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2020-10-16 02:31:43,479 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 160 flow [2020-10-16 02:31:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:43,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:43,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 294 transitions. [2020-10-16 02:31:43,481 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2020-10-16 02:31:43,481 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 294 transitions. [2020-10-16 02:31:43,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 294 transitions. [2020-10-16 02:31:43,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:43,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 294 transitions. [2020-10-16 02:31:43,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:43,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:43,484 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:43,485 INFO L185 Difference]: Start difference. First operand has 42 places, 37 transitions, 134 flow. Second operand 3 states and 294 transitions. [2020-10-16 02:31:43,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 160 flow [2020-10-16 02:31:43,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:43,489 INFO L241 Difference]: Finished difference. Result has 45 places, 38 transitions, 146 flow [2020-10-16 02:31:43,489 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2020-10-16 02:31:43,490 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2020-10-16 02:31:43,490 INFO L481 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 146 flow [2020-10-16 02:31:43,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:43,490 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:43,490 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:43,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-16 02:31:43,491 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:43,491 INFO L82 PathProgramCache]: Analyzing trace with hash -173965401, now seen corresponding path program 1 times [2020-10-16 02:31:43,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:43,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853711820] [2020-10-16 02:31:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:43,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853711820] [2020-10-16 02:31:43,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:43,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:43,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192756407] [2020-10-16 02:31:43,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:43,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:43,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:43,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:43,518 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 02:31:43,519 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 146 flow. Second operand 4 states. [2020-10-16 02:31:43,519 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:43,519 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 02:31:43,519 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:43,589 INFO L129 PetriNetUnfolder]: 90/375 cut-off events. [2020-10-16 02:31:43,590 INFO L130 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2020-10-16 02:31:43,591 INFO L80 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 375 events. 90/375 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1698 event pairs, 33 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 707. Up to 175 conditions per place. [2020-10-16 02:31:43,593 INFO L132 encePairwiseOnDemand]: 151/158 looper letters, 8 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2020-10-16 02:31:43,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 182 flow [2020-10-16 02:31:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:43,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 392 transitions. [2020-10-16 02:31:43,596 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2020-10-16 02:31:43,596 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 392 transitions. [2020-10-16 02:31:43,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 392 transitions. [2020-10-16 02:31:43,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:43,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 392 transitions. [2020-10-16 02:31:43,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:43,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:43,599 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:43,599 INFO L185 Difference]: Start difference. First operand has 45 places, 38 transitions, 146 flow. Second operand 4 states and 392 transitions. [2020-10-16 02:31:43,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 182 flow [2020-10-16 02:31:43,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:43,601 INFO L241 Difference]: Finished difference. Result has 48 places, 40 transitions, 172 flow [2020-10-16 02:31:43,602 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2020-10-16 02:31:43,602 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2020-10-16 02:31:43,602 INFO L481 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 172 flow [2020-10-16 02:31:43,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:43,602 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:43,602 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:43,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-16 02:31:43,603 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:43,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:43,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1927840068, now seen corresponding path program 1 times [2020-10-16 02:31:43,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:43,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618614125] [2020-10-16 02:31:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:43,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618614125] [2020-10-16 02:31:43,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957150083] [2020-10-16 02:31:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:43,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:31:43,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:43,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:43,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:31:43,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779951037] [2020-10-16 02:31:43,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:31:43,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:43,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:31:43,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:31:43,730 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 02:31:43,730 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 172 flow. Second operand 6 states. [2020-10-16 02:31:43,730 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:43,730 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 02:31:43,731 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:43,805 INFO L129 PetriNetUnfolder]: 89/370 cut-off events. [2020-10-16 02:31:43,805 INFO L130 PetriNetUnfolder]: For 170/170 co-relation queries the response was YES. [2020-10-16 02:31:43,806 INFO L80 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 370 events. 89/370 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1693 event pairs, 33 based on Foata normal form. 1/340 useless extension candidates. Maximal degree in co-relation 491. Up to 212 conditions per place. [2020-10-16 02:31:43,808 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 12 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2020-10-16 02:31:43,809 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 210 flow [2020-10-16 02:31:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2020-10-16 02:31:43,811 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6170886075949367 [2020-10-16 02:31:43,811 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2020-10-16 02:31:43,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2020-10-16 02:31:43,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:43,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2020-10-16 02:31:43,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:43,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:43,814 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:43,814 INFO L185 Difference]: Start difference. First operand has 48 places, 40 transitions, 172 flow. Second operand 4 states and 390 transitions. [2020-10-16 02:31:43,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 210 flow [2020-10-16 02:31:43,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 43 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:43,817 INFO L241 Difference]: Finished difference. Result has 51 places, 41 transitions, 187 flow [2020-10-16 02:31:43,817 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2020-10-16 02:31:43,817 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2020-10-16 02:31:43,817 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 187 flow [2020-10-16 02:31:43,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:31:43,817 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:43,818 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:44,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 02:31:44,033 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:44,034 INFO L82 PathProgramCache]: Analyzing trace with hash -890711517, now seen corresponding path program 1 times [2020-10-16 02:31:44,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:44,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441852181] [2020-10-16 02:31:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:44,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441852181] [2020-10-16 02:31:44,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365666238] [2020-10-16 02:31:44,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:31:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:44,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:44,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 02:31:44,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889695505] [2020-10-16 02:31:44,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:31:44,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:44,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:31:44,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:31:44,210 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 02:31:44,210 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 187 flow. Second operand 8 states. [2020-10-16 02:31:44,210 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:44,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 02:31:44,211 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:44,313 INFO L129 PetriNetUnfolder]: 87/362 cut-off events. [2020-10-16 02:31:44,313 INFO L130 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2020-10-16 02:31:44,314 INFO L80 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 362 events. 87/362 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1701 event pairs, 34 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 886. Up to 206 conditions per place. [2020-10-16 02:31:44,316 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 13 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2020-10-16 02:31:44,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 233 flow [2020-10-16 02:31:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:31:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:31:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 486 transitions. [2020-10-16 02:31:44,319 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6151898734177215 [2020-10-16 02:31:44,319 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 486 transitions. [2020-10-16 02:31:44,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 486 transitions. [2020-10-16 02:31:44,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:44,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 486 transitions. [2020-10-16 02:31:44,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:31:44,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:31:44,323 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:31:44,323 INFO L185 Difference]: Start difference. First operand has 51 places, 41 transitions, 187 flow. Second operand 5 states and 486 transitions. [2020-10-16 02:31:44,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 233 flow [2020-10-16 02:31:44,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 227 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 02:31:44,326 INFO L241 Difference]: Finished difference. Result has 54 places, 42 transitions, 201 flow [2020-10-16 02:31:44,327 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2020-10-16 02:31:44,327 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2020-10-16 02:31:44,327 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 201 flow [2020-10-16 02:31:44,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:31:44,327 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:44,327 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:44,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 02:31:44,541 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:44,541 INFO L82 PathProgramCache]: Analyzing trace with hash 99472464, now seen corresponding path program 1 times [2020-10-16 02:31:44,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:44,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197055141] [2020-10-16 02:31:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:44,555 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:44,565 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:44,573 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:44,573 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:44,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-16 02:31:44,574 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:44,575 WARN L371 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:44,575 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-10-16 02:31:44,584 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,585 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,585 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,585 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,585 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,585 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,585 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,586 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,586 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,586 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,586 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,586 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,586 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,587 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,587 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,587 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,587 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,587 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,587 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,587 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,587 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,588 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,588 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,588 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,588 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,588 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,588 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,589 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,589 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,589 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,589 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,589 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,589 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,589 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,590 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,590 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,590 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,590 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,590 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,590 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,590 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,591 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,591 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,591 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,591 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,591 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,592 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,593 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,593 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,593 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,593 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,593 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,595 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,595 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,595 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,595 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,595 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,596 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,596 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,597 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,597 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,597 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,598 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,598 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,598 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,598 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,599 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,600 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,600 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,600 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,600 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,600 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:44,605 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:44,606 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:44,606 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:44,606 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:44,606 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:44,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:44,606 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:44,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:44,606 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:44,608 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 290 flow [2020-10-16 02:31:44,822 INFO L129 PetriNetUnfolder]: 399/2291 cut-off events. [2020-10-16 02:31:44,822 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 02:31:44,833 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 2291 events. 399/2291 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 16193 event pairs, 72 based on Foata normal form. 0/1892 useless extension candidates. Maximal degree in co-relation 1271. Up to 192 conditions per place. [2020-10-16 02:31:44,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 106 transitions, 290 flow [2020-10-16 02:31:44,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 99 transitions, 276 flow [2020-10-16 02:31:44,842 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:44,842 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 99 transitions, 276 flow [2020-10-16 02:31:44,843 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 99 transitions, 276 flow [2020-10-16 02:31:44,843 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 101 places, 99 transitions, 276 flow [2020-10-16 02:31:45,010 INFO L129 PetriNetUnfolder]: 335/1843 cut-off events. [2020-10-16 02:31:45,010 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 02:31:45,018 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 1843 events. 335/1843 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 12005 event pairs, 72 based on Foata normal form. 0/1572 useless extension candidates. Maximal degree in co-relation 1047. Up to 192 conditions per place. [2020-10-16 02:31:45,057 INFO L117 LiptonReduction]: Number of co-enabled transitions 3240 [2020-10-16 02:31:46,774 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-16 02:31:46,932 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 02:31:46,945 INFO L132 LiptonReduction]: Checked pairs total: 11418 [2020-10-16 02:31:46,945 INFO L134 LiptonReduction]: Total number of compositions: 62 [2020-10-16 02:31:46,945 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2103 [2020-10-16 02:31:46,947 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 02:31:46,947 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:46,947 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:46,947 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:46,947 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:46,947 INFO L82 PathProgramCache]: Analyzing trace with hash 32517232, now seen corresponding path program 1 times [2020-10-16 02:31:46,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:46,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112614136] [2020-10-16 02:31:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:46,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:46,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112614136] [2020-10-16 02:31:46,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:46,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:46,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967541243] [2020-10-16 02:31:46,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:46,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:46,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:46,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:46,973 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 02:31:46,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 162 flow. Second operand 3 states. [2020-10-16 02:31:46,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:46,974 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 02:31:46,974 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:47,057 INFO L129 PetriNetUnfolder]: 198/625 cut-off events. [2020-10-16 02:31:47,057 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 02:31:47,059 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 625 events. 198/625 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2984 event pairs, 72 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 603. Up to 338 conditions per place. [2020-10-16 02:31:47,063 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 9 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2020-10-16 02:31:47,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 188 flow [2020-10-16 02:31:47,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2020-10-16 02:31:47,066 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2020-10-16 02:31:47,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2020-10-16 02:31:47,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2020-10-16 02:31:47,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:47,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2020-10-16 02:31:47,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:47,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:47,068 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:47,068 INFO L185 Difference]: Start difference. First operand has 48 places, 42 transitions, 162 flow. Second operand 3 states and 321 transitions. [2020-10-16 02:31:47,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 188 flow [2020-10-16 02:31:47,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:47,071 INFO L241 Difference]: Finished difference. Result has 51 places, 43 transitions, 174 flow [2020-10-16 02:31:47,071 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2020-10-16 02:31:47,071 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2020-10-16 02:31:47,072 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 174 flow [2020-10-16 02:31:47,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:47,072 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:47,072 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:47,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-16 02:31:47,072 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:47,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1901913869, now seen corresponding path program 1 times [2020-10-16 02:31:47,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:47,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777411923] [2020-10-16 02:31:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:47,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777411923] [2020-10-16 02:31:47,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:47,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:47,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157258400] [2020-10-16 02:31:47,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:47,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:47,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:47,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:47,115 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 02:31:47,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 174 flow. Second operand 4 states. [2020-10-16 02:31:47,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:47,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 02:31:47,115 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:47,210 INFO L129 PetriNetUnfolder]: 207/735 cut-off events. [2020-10-16 02:31:47,210 INFO L130 PetriNetUnfolder]: For 263/263 co-relation queries the response was YES. [2020-10-16 02:31:47,212 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 735 events. 207/735 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3946 event pairs, 87 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 1395. Up to 342 conditions per place. [2020-10-16 02:31:47,217 INFO L132 encePairwiseOnDemand]: 161/168 looper letters, 8 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2020-10-16 02:31:47,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 210 flow [2020-10-16 02:31:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 428 transitions. [2020-10-16 02:31:47,219 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2020-10-16 02:31:47,219 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 428 transitions. [2020-10-16 02:31:47,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 428 transitions. [2020-10-16 02:31:47,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:47,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 428 transitions. [2020-10-16 02:31:47,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:47,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:47,222 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:47,222 INFO L185 Difference]: Start difference. First operand has 51 places, 43 transitions, 174 flow. Second operand 4 states and 428 transitions. [2020-10-16 02:31:47,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 210 flow [2020-10-16 02:31:47,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:47,225 INFO L241 Difference]: Finished difference. Result has 54 places, 45 transitions, 200 flow [2020-10-16 02:31:47,225 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2020-10-16 02:31:47,226 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 6 predicate places. [2020-10-16 02:31:47,226 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 200 flow [2020-10-16 02:31:47,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:47,226 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:47,226 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:47,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-16 02:31:47,227 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:47,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:47,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1796489895, now seen corresponding path program 1 times [2020-10-16 02:31:47,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:47,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887029863] [2020-10-16 02:31:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:47,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887029863] [2020-10-16 02:31:47,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498828584] [2020-10-16 02:31:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:31:47,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:47,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:47,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:31:47,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624237847] [2020-10-16 02:31:47,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:31:47,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:47,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:31:47,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:31:47,413 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 02:31:47,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 200 flow. Second operand 6 states. [2020-10-16 02:31:47,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:47,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 02:31:47,414 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:47,532 INFO L129 PetriNetUnfolder]: 206/730 cut-off events. [2020-10-16 02:31:47,533 INFO L130 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2020-10-16 02:31:47,535 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 730 events. 206/730 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3954 event pairs, 87 based on Foata normal form. 1/668 useless extension candidates. Maximal degree in co-relation 944. Up to 413 conditions per place. [2020-10-16 02:31:47,540 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 12 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2020-10-16 02:31:47,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 48 transitions, 238 flow [2020-10-16 02:31:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 426 transitions. [2020-10-16 02:31:47,542 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2020-10-16 02:31:47,543 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 426 transitions. [2020-10-16 02:31:47,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 426 transitions. [2020-10-16 02:31:47,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:47,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 426 transitions. [2020-10-16 02:31:47,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:47,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:47,546 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:47,546 INFO L185 Difference]: Start difference. First operand has 54 places, 45 transitions, 200 flow. Second operand 4 states and 426 transitions. [2020-10-16 02:31:47,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 48 transitions, 238 flow [2020-10-16 02:31:47,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 48 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:47,549 INFO L241 Difference]: Finished difference. Result has 57 places, 46 transitions, 215 flow [2020-10-16 02:31:47,550 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2020-10-16 02:31:47,550 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 9 predicate places. [2020-10-16 02:31:47,551 INFO L481 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 215 flow [2020-10-16 02:31:47,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:31:47,551 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:47,551 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:47,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:47,766 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:47,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:47,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1936900963, now seen corresponding path program 1 times [2020-10-16 02:31:47,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:47,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507514135] [2020-10-16 02:31:47,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:47,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507514135] [2020-10-16 02:31:47,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343565248] [2020-10-16 02:31:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:47,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:31:47,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:47,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:47,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 02:31:47,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344514214] [2020-10-16 02:31:47,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:31:47,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:47,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:31:47,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:31:47,906 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 02:31:47,907 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 215 flow. Second operand 8 states. [2020-10-16 02:31:47,907 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:47,907 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 02:31:47,907 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:48,036 INFO L129 PetriNetUnfolder]: 204/722 cut-off events. [2020-10-16 02:31:48,036 INFO L130 PetriNetUnfolder]: For 359/359 co-relation queries the response was YES. [2020-10-16 02:31:48,039 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1821 conditions, 722 events. 204/722 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3975 event pairs, 88 based on Foata normal form. 1/660 useless extension candidates. Maximal degree in co-relation 1780. Up to 407 conditions per place. [2020-10-16 02:31:48,044 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 13 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2020-10-16 02:31:48,044 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 261 flow [2020-10-16 02:31:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:31:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:31:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2020-10-16 02:31:48,047 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2020-10-16 02:31:48,047 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2020-10-16 02:31:48,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2020-10-16 02:31:48,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:48,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2020-10-16 02:31:48,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:31:48,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:31:48,051 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:31:48,051 INFO L185 Difference]: Start difference. First operand has 57 places, 46 transitions, 215 flow. Second operand 5 states and 531 transitions. [2020-10-16 02:31:48,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 261 flow [2020-10-16 02:31:48,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 255 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 02:31:48,054 INFO L241 Difference]: Finished difference. Result has 60 places, 47 transitions, 229 flow [2020-10-16 02:31:48,055 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2020-10-16 02:31:48,055 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 12 predicate places. [2020-10-16 02:31:48,056 INFO L481 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 229 flow [2020-10-16 02:31:48,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:31:48,056 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:48,056 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:48,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 02:31:48,270 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 348671934, now seen corresponding path program 1 times [2020-10-16 02:31:48,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:48,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738586163] [2020-10-16 02:31:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:48,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:48,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738586163] [2020-10-16 02:31:48,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49410268] [2020-10-16 02:31:48,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:48,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:31:48,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:48,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:48,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 02:31:48,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643507858] [2020-10-16 02:31:48,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 02:31:48,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 02:31:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 02:31:48,475 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 02:31:48,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 229 flow. Second operand 10 states. [2020-10-16 02:31:48,476 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:48,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 02:31:48,476 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:48,593 INFO L129 PetriNetUnfolder]: 201/711 cut-off events. [2020-10-16 02:31:48,593 INFO L130 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2020-10-16 02:31:48,595 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1802 conditions, 711 events. 201/711 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4003 event pairs, 92 based on Foata normal form. 1/649 useless extension candidates. Maximal degree in co-relation 1746. Up to 400 conditions per place. [2020-10-16 02:31:48,598 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 14 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2020-10-16 02:31:48,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 52 transitions, 283 flow [2020-10-16 02:31:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:31:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:31:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 636 transitions. [2020-10-16 02:31:48,601 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2020-10-16 02:31:48,601 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 636 transitions. [2020-10-16 02:31:48,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 636 transitions. [2020-10-16 02:31:48,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:48,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 636 transitions. [2020-10-16 02:31:48,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:31:48,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:31:48,605 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:31:48,605 INFO L185 Difference]: Start difference. First operand has 60 places, 47 transitions, 229 flow. Second operand 6 states and 636 transitions. [2020-10-16 02:31:48,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 52 transitions, 283 flow [2020-10-16 02:31:48,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 52 transitions, 273 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 02:31:48,608 INFO L241 Difference]: Finished difference. Result has 63 places, 48 transitions, 243 flow [2020-10-16 02:31:48,609 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2020-10-16 02:31:48,609 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2020-10-16 02:31:48,609 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 243 flow [2020-10-16 02:31:48,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 02:31:48,609 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:48,609 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:48,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:48,824 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:48,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1736436190, now seen corresponding path program 1 times [2020-10-16 02:31:48,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:48,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547899274] [2020-10-16 02:31:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:48,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:48,837 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:48,850 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:48,862 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:48,864 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:48,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-16 02:31:48,865 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:48,865 WARN L371 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:48,866 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-10-16 02:31:48,883 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,884 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,884 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,884 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,884 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,884 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,884 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,885 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,885 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,885 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,885 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,885 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,885 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,885 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,886 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,886 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,886 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,886 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,886 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,886 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,886 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,887 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,887 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,887 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,887 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,887 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,887 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,887 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,888 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,888 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,888 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,888 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,888 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,888 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,888 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,889 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,889 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,889 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,889 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,891 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,891 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,891 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,891 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,891 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,892 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,892 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,892 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,892 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,892 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,892 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,893 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,893 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,893 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,893 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,894 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,895 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,895 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,895 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,895 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,896 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,896 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,896 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,897 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,897 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,898 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,898 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,898 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,898 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,899 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,900 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,900 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,900 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,901 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,901 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,902 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,902 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,902 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,902 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,902 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,904 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,904 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,904 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,904 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,904 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:48,910 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:48,911 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:48,911 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:48,911 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:48,911 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:48,911 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:48,911 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:48,911 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:48,911 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:48,914 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 324 flow [2020-10-16 02:31:49,389 INFO L129 PetriNetUnfolder]: 849/4546 cut-off events. [2020-10-16 02:31:49,389 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 02:31:49,402 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 4546 events. 849/4546 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 38654 event pairs, 201 based on Foata normal form. 0/3761 useless extension candidates. Maximal degree in co-relation 2509. Up to 448 conditions per place. [2020-10-16 02:31:49,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 113 transitions, 324 flow [2020-10-16 02:31:49,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 106 transitions, 310 flow [2020-10-16 02:31:49,421 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:49,421 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 106 transitions, 310 flow [2020-10-16 02:31:49,421 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 106 transitions, 310 flow [2020-10-16 02:31:49,421 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 109 places, 106 transitions, 310 flow [2020-10-16 02:31:49,671 INFO L129 PetriNetUnfolder]: 721/3650 cut-off events. [2020-10-16 02:31:49,671 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 02:31:49,690 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4148 conditions, 3650 events. 721/3650 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 29207 event pairs, 201 based on Foata normal form. 0/3121 useless extension candidates. Maximal degree in co-relation 2061. Up to 448 conditions per place. [2020-10-16 02:31:49,760 INFO L117 LiptonReduction]: Number of co-enabled transitions 4060 [2020-10-16 02:31:51,267 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-16 02:31:51,534 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 02:31:51,619 INFO L132 LiptonReduction]: Checked pairs total: 18122 [2020-10-16 02:31:51,620 INFO L134 LiptonReduction]: Total number of compositions: 65 [2020-10-16 02:31:51,620 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2199 [2020-10-16 02:31:51,622 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 02:31:51,622 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:51,622 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:51,622 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:51,622 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:51,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:51,623 INFO L82 PathProgramCache]: Analyzing trace with hash 38211156, now seen corresponding path program 1 times [2020-10-16 02:31:51,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:51,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523596377] [2020-10-16 02:31:51,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:51,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523596377] [2020-10-16 02:31:51,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:51,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:51,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874151204] [2020-10-16 02:31:51,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:51,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:51,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:51,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:51,645 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 02:31:51,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 192 flow. Second operand 3 states. [2020-10-16 02:31:51,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:51,646 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 02:31:51,646 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:51,808 INFO L129 PetriNetUnfolder]: 455/1273 cut-off events. [2020-10-16 02:31:51,809 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 02:31:51,815 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2434 conditions, 1273 events. 455/1273 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7235 event pairs, 201 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 1199. Up to 661 conditions per place. [2020-10-16 02:31:51,823 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 9 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2020-10-16 02:31:51,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 218 flow [2020-10-16 02:31:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2020-10-16 02:31:51,825 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6573033707865169 [2020-10-16 02:31:51,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2020-10-16 02:31:51,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2020-10-16 02:31:51,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:51,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2020-10-16 02:31:51,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:51,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:51,828 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:51,828 INFO L185 Difference]: Start difference. First operand has 54 places, 47 transitions, 192 flow. Second operand 3 states and 351 transitions. [2020-10-16 02:31:51,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 218 flow [2020-10-16 02:31:51,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 218 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:51,831 INFO L241 Difference]: Finished difference. Result has 57 places, 48 transitions, 204 flow [2020-10-16 02:31:51,831 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2020-10-16 02:31:51,831 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2020-10-16 02:31:51,832 INFO L481 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 204 flow [2020-10-16 02:31:51,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:51,832 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:51,832 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:51,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-16 02:31:51,832 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:51,833 INFO L82 PathProgramCache]: Analyzing trace with hash 939052157, now seen corresponding path program 1 times [2020-10-16 02:31:51,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:51,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129576873] [2020-10-16 02:31:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:51,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129576873] [2020-10-16 02:31:51,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:51,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:51,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355138766] [2020-10-16 02:31:51,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:51,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:51,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:51,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:51,873 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 02:31:51,874 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 204 flow. Second operand 4 states. [2020-10-16 02:31:51,874 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:51,874 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 02:31:51,874 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:52,093 INFO L129 PetriNetUnfolder]: 469/1466 cut-off events. [2020-10-16 02:31:52,093 INFO L130 PetriNetUnfolder]: For 553/553 co-relation queries the response was YES. [2020-10-16 02:31:52,099 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2817 conditions, 1466 events. 469/1466 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9098 event pairs, 222 based on Foata normal form. 0/1212 useless extension candidates. Maximal degree in co-relation 2793. Up to 670 conditions per place. [2020-10-16 02:31:52,105 INFO L132 encePairwiseOnDemand]: 171/178 looper letters, 8 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2020-10-16 02:31:52,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 240 flow [2020-10-16 02:31:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2020-10-16 02:31:52,107 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6573033707865169 [2020-10-16 02:31:52,107 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2020-10-16 02:31:52,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2020-10-16 02:31:52,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:52,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2020-10-16 02:31:52,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:52,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:52,111 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:52,111 INFO L185 Difference]: Start difference. First operand has 57 places, 48 transitions, 204 flow. Second operand 4 states and 468 transitions. [2020-10-16 02:31:52,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 240 flow [2020-10-16 02:31:52,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:52,114 INFO L241 Difference]: Finished difference. Result has 60 places, 50 transitions, 230 flow [2020-10-16 02:31:52,115 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2020-10-16 02:31:52,115 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2020-10-16 02:31:52,115 INFO L481 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 230 flow [2020-10-16 02:31:52,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:52,115 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:52,115 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:52,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-16 02:31:52,116 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:52,116 INFO L82 PathProgramCache]: Analyzing trace with hash 314298890, now seen corresponding path program 1 times [2020-10-16 02:31:52,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:52,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067084390] [2020-10-16 02:31:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:52,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067084390] [2020-10-16 02:31:52,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986672330] [2020-10-16 02:31:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:52,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:31:52,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:52,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:52,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:31:52,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950262764] [2020-10-16 02:31:52,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:31:52,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:52,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:31:52,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:31:52,311 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 02:31:52,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 230 flow. Second operand 6 states. [2020-10-16 02:31:52,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:52,311 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 02:31:52,311 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:52,501 INFO L129 PetriNetUnfolder]: 468/1461 cut-off events. [2020-10-16 02:31:52,501 INFO L130 PetriNetUnfolder]: For 707/707 co-relation queries the response was YES. [2020-10-16 02:31:52,509 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3625 conditions, 1461 events. 468/1461 cut-off events. For 707/707 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9105 event pairs, 222 based on Foata normal form. 1/1335 useless extension candidates. Maximal degree in co-relation 1837. Up to 807 conditions per place. [2020-10-16 02:31:52,516 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 12 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2020-10-16 02:31:52,517 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 268 flow [2020-10-16 02:31:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2020-10-16 02:31:52,519 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6544943820224719 [2020-10-16 02:31:52,519 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2020-10-16 02:31:52,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2020-10-16 02:31:52,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:52,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2020-10-16 02:31:52,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:52,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:52,522 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:52,522 INFO L185 Difference]: Start difference. First operand has 60 places, 50 transitions, 230 flow. Second operand 4 states and 466 transitions. [2020-10-16 02:31:52,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 268 flow [2020-10-16 02:31:52,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:52,525 INFO L241 Difference]: Finished difference. Result has 63 places, 51 transitions, 245 flow [2020-10-16 02:31:52,526 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2020-10-16 02:31:52,526 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2020-10-16 02:31:52,526 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 245 flow [2020-10-16 02:31:52,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:31:52,526 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:52,526 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:52,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 02:31:52,742 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1701157806, now seen corresponding path program 1 times [2020-10-16 02:31:52,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:52,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938311759] [2020-10-16 02:31:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:52,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938311759] [2020-10-16 02:31:52,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614731993] [2020-10-16 02:31:52,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:31:52,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:52,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:52,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 02:31:52,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618549152] [2020-10-16 02:31:52,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:31:52,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:52,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:31:52,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:31:52,915 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 02:31:52,916 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 245 flow. Second operand 8 states. [2020-10-16 02:31:52,916 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:52,916 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 02:31:52,917 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:53,200 INFO L129 PetriNetUnfolder]: 466/1453 cut-off events. [2020-10-16 02:31:53,201 INFO L130 PetriNetUnfolder]: For 722/722 co-relation queries the response was YES. [2020-10-16 02:31:53,210 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3620 conditions, 1453 events. 466/1453 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9159 event pairs, 223 based on Foata normal form. 1/1327 useless extension candidates. Maximal degree in co-relation 3578. Up to 801 conditions per place. [2020-10-16 02:31:53,224 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 13 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2020-10-16 02:31:53,225 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 291 flow [2020-10-16 02:31:53,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:31:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:31:53,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 581 transitions. [2020-10-16 02:31:53,228 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6528089887640449 [2020-10-16 02:31:53,228 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 581 transitions. [2020-10-16 02:31:53,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 581 transitions. [2020-10-16 02:31:53,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:53,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 581 transitions. [2020-10-16 02:31:53,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:31:53,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:31:53,234 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:31:53,234 INFO L185 Difference]: Start difference. First operand has 63 places, 51 transitions, 245 flow. Second operand 5 states and 581 transitions. [2020-10-16 02:31:53,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 291 flow [2020-10-16 02:31:53,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 285 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 02:31:53,241 INFO L241 Difference]: Finished difference. Result has 66 places, 52 transitions, 259 flow [2020-10-16 02:31:53,241 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2020-10-16 02:31:53,241 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2020-10-16 02:31:53,241 INFO L481 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 259 flow [2020-10-16 02:31:53,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:31:53,242 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:53,242 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:53,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 02:31:53,457 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:53,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:53,458 INFO L82 PathProgramCache]: Analyzing trace with hash -223060935, now seen corresponding path program 1 times [2020-10-16 02:31:53,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:53,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203182219] [2020-10-16 02:31:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:53,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203182219] [2020-10-16 02:31:53,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818608762] [2020-10-16 02:31:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:53,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:31:53,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:53,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:53,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 02:31:53,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547564072] [2020-10-16 02:31:53,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 02:31:53,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:53,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 02:31:53,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 02:31:53,727 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 02:31:53,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 259 flow. Second operand 10 states. [2020-10-16 02:31:53,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:53,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 02:31:53,728 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:54,028 INFO L129 PetriNetUnfolder]: 463/1442 cut-off events. [2020-10-16 02:31:54,028 INFO L130 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2020-10-16 02:31:54,034 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 1442 events. 463/1442 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 9230 event pairs, 227 based on Foata normal form. 1/1316 useless extension candidates. Maximal degree in co-relation 3546. Up to 794 conditions per place. [2020-10-16 02:31:54,042 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 14 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2020-10-16 02:31:54,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 313 flow [2020-10-16 02:31:54,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:31:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:31:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 696 transitions. [2020-10-16 02:31:54,046 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2020-10-16 02:31:54,046 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 696 transitions. [2020-10-16 02:31:54,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 696 transitions. [2020-10-16 02:31:54,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:54,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 696 transitions. [2020-10-16 02:31:54,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:31:54,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:31:54,051 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:31:54,051 INFO L185 Difference]: Start difference. First operand has 66 places, 52 transitions, 259 flow. Second operand 6 states and 696 transitions. [2020-10-16 02:31:54,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 313 flow [2020-10-16 02:31:54,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 303 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 02:31:54,057 INFO L241 Difference]: Finished difference. Result has 69 places, 53 transitions, 273 flow [2020-10-16 02:31:54,057 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2020-10-16 02:31:54,058 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2020-10-16 02:31:54,058 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 273 flow [2020-10-16 02:31:54,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 02:31:54,058 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:54,058 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:54,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 02:31:54,271 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:54,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:54,272 INFO L82 PathProgramCache]: Analyzing trace with hash 495964735, now seen corresponding path program 1 times [2020-10-16 02:31:54,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:54,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921659484] [2020-10-16 02:31:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:54,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921659484] [2020-10-16 02:31:54,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457504711] [2020-10-16 02:31:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:54,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 02:31:54,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:54,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:54,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 02:31:54,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099175410] [2020-10-16 02:31:54,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 02:31:54,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:54,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 02:31:54,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-16 02:31:54,462 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 02:31:54,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 273 flow. Second operand 12 states. [2020-10-16 02:31:54,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:54,464 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 02:31:54,464 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:54,631 INFO L129 PetriNetUnfolder]: 459/1428 cut-off events. [2020-10-16 02:31:54,631 INFO L130 PetriNetUnfolder]: For 740/740 co-relation queries the response was YES. [2020-10-16 02:31:54,636 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3575 conditions, 1428 events. 459/1428 cut-off events. For 740/740 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9329 event pairs, 238 based on Foata normal form. 1/1302 useless extension candidates. Maximal degree in co-relation 3502. Up to 653 conditions per place. [2020-10-16 02:31:54,642 INFO L132 encePairwiseOnDemand]: 172/178 looper letters, 10 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2020-10-16 02:31:54,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 59 transitions, 335 flow [2020-10-16 02:31:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 02:31:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 02:31:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2020-10-16 02:31:54,646 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.648876404494382 [2020-10-16 02:31:54,646 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2020-10-16 02:31:54,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2020-10-16 02:31:54,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:54,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2020-10-16 02:31:54,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 02:31:54,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 02:31:54,651 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 02:31:54,651 INFO L185 Difference]: Start difference. First operand has 69 places, 53 transitions, 273 flow. Second operand 8 states and 924 transitions. [2020-10-16 02:31:54,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 59 transitions, 335 flow [2020-10-16 02:31:54,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 59 transitions, 321 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 02:31:54,656 INFO L241 Difference]: Finished difference. Result has 74 places, 55 transitions, 306 flow [2020-10-16 02:31:54,657 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=306, PETRI_PLACES=74, PETRI_TRANSITIONS=55} [2020-10-16 02:31:54,657 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2020-10-16 02:31:54,657 INFO L481 AbstractCegarLoop]: Abstraction has has 74 places, 55 transitions, 306 flow [2020-10-16 02:31:54,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 02:31:54,657 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:54,657 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:54,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 02:31:54,873 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:54,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:54,873 INFO L82 PathProgramCache]: Analyzing trace with hash 781378849, now seen corresponding path program 1 times [2020-10-16 02:31:54,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:54,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730344276] [2020-10-16 02:31:54,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:54,884 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:31:54,893 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:31:54,908 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:31:54,908 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:31:54,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-16 02:31:54,908 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:31:54,909 WARN L371 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:31:54,909 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2020-10-16 02:31:54,925 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,925 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,925 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,925 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,926 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,926 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,926 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,926 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,926 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,926 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,926 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,927 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,927 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,927 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,927 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,927 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,927 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,927 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,928 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,928 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,928 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,928 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,928 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,928 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,928 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,928 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,929 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,929 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,929 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,929 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,929 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,929 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,929 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,930 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,930 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,930 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,930 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,930 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,930 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,930 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,931 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,931 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,931 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,931 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,931 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,931 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,931 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,932 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,932 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,932 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,932 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,933 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,933 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,933 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,933 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,933 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,933 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,934 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,934 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,934 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,934 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,936 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,936 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,936 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,936 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,936 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,937 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,938 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,938 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,938 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,938 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,939 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,939 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,939 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,939 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,940 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,941 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,941 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,941 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,941 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,941 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,942 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,943 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,943 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,943 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,943 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,944 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,944 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,944 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,945 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,945 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,946 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,946 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,946 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,946 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,946 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:31:54,953 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:31:54,953 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:31:54,953 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:31:54,953 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:31:54,953 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:31:54,953 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:31:54,954 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:31:54,954 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:31:54,954 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:31:54,955 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 123 places, 120 transitions, 360 flow [2020-10-16 02:31:55,775 INFO L129 PetriNetUnfolder]: 1811/9105 cut-off events. [2020-10-16 02:31:55,775 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 02:31:55,824 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10190 conditions, 9105 events. 1811/9105 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 89225 event pairs, 522 based on Foata normal form. 0/7550 useless extension candidates. Maximal degree in co-relation 5028. Up to 1024 conditions per place. [2020-10-16 02:31:55,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 120 transitions, 360 flow [2020-10-16 02:31:55,850 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 113 transitions, 346 flow [2020-10-16 02:31:55,850 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:31:55,850 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 113 transitions, 346 flow [2020-10-16 02:31:55,851 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 113 transitions, 346 flow [2020-10-16 02:31:55,851 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 117 places, 113 transitions, 346 flow [2020-10-16 02:31:56,599 INFO L129 PetriNetUnfolder]: 1555/7313 cut-off events. [2020-10-16 02:31:56,599 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 02:31:56,620 INFO L80 FinitePrefix]: Finished finitePrefix Result has 8398 conditions, 7313 events. 1555/7313 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 67995 event pairs, 522 based on Foata normal form. 0/6270 useless extension candidates. Maximal degree in co-relation 4132. Up to 1024 conditions per place. [2020-10-16 02:31:56,709 INFO L117 LiptonReduction]: Number of co-enabled transitions 4960 [2020-10-16 02:31:58,537 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 02:31:58,616 INFO L132 LiptonReduction]: Checked pairs total: 20069 [2020-10-16 02:31:58,617 INFO L134 LiptonReduction]: Total number of compositions: 66 [2020-10-16 02:31:58,617 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2767 [2020-10-16 02:31:58,618 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 02:31:58,618 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:31:58,618 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:58,619 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:31:58,619 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:58,619 INFO L82 PathProgramCache]: Analyzing trace with hash 44152403, now seen corresponding path program 1 times [2020-10-16 02:31:58,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:58,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324802533] [2020-10-16 02:31:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:58,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:31:58,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324802533] [2020-10-16 02:31:58,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:58,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:31:58,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548691976] [2020-10-16 02:31:58,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:31:58,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:58,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:31:58,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:31:58,642 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:31:58,643 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 224 flow. Second operand 3 states. [2020-10-16 02:31:58,643 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:58,643 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:31:58,643 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:59,016 INFO L129 PetriNetUnfolder]: 1032/2625 cut-off events. [2020-10-16 02:31:59,016 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 02:31:59,024 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5016 conditions, 2625 events. 1032/2625 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 17012 event pairs, 522 based on Foata normal form. 0/2105 useless extension candidates. Maximal degree in co-relation 2436. Up to 1304 conditions per place. [2020-10-16 02:31:59,038 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 9 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2020-10-16 02:31:59,038 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 250 flow [2020-10-16 02:31:59,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:31:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:31:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2020-10-16 02:31:59,040 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2020-10-16 02:31:59,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2020-10-16 02:31:59,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2020-10-16 02:31:59,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:59,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2020-10-16 02:31:59,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:31:59,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:31:59,043 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:31:59,044 INFO L185 Difference]: Start difference. First operand has 60 places, 52 transitions, 224 flow. Second operand 3 states and 372 transitions. [2020-10-16 02:31:59,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 250 flow [2020-10-16 02:31:59,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 54 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:31:59,048 INFO L241 Difference]: Finished difference. Result has 63 places, 53 transitions, 236 flow [2020-10-16 02:31:59,048 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2020-10-16 02:31:59,048 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2020-10-16 02:31:59,048 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 236 flow [2020-10-16 02:31:59,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:31:59,048 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:59,048 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:59,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-16 02:31:59,049 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:59,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:59,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1362338127, now seen corresponding path program 1 times [2020-10-16 02:31:59,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:59,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371392862] [2020-10-16 02:31:59,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:31:59,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371392862] [2020-10-16 02:31:59,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:31:59,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:31:59,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995860776] [2020-10-16 02:31:59,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:31:59,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:59,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:31:59,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:31:59,073 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:31:59,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 236 flow. Second operand 4 states. [2020-10-16 02:31:59,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:59,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:31:59,074 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:59,378 INFO L129 PetriNetUnfolder]: 1052/2968 cut-off events. [2020-10-16 02:31:59,378 INFO L130 PetriNetUnfolder]: For 1172/1172 co-relation queries the response was YES. [2020-10-16 02:31:59,394 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5694 conditions, 2968 events. 1052/2968 cut-off events. For 1172/1172 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20909 event pairs, 550 based on Foata normal form. 0/2458 useless extension candidates. Maximal degree in co-relation 5669. Up to 1319 conditions per place. [2020-10-16 02:31:59,406 INFO L132 encePairwiseOnDemand]: 179/186 looper letters, 8 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2020-10-16 02:31:59,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 272 flow [2020-10-16 02:31:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 496 transitions. [2020-10-16 02:31:59,409 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2020-10-16 02:31:59,409 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 496 transitions. [2020-10-16 02:31:59,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 496 transitions. [2020-10-16 02:31:59,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:59,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 496 transitions. [2020-10-16 02:31:59,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:59,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:59,412 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:59,412 INFO L185 Difference]: Start difference. First operand has 63 places, 53 transitions, 236 flow. Second operand 4 states and 496 transitions. [2020-10-16 02:31:59,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 272 flow [2020-10-16 02:31:59,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:59,416 INFO L241 Difference]: Finished difference. Result has 66 places, 55 transitions, 262 flow [2020-10-16 02:31:59,416 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2020-10-16 02:31:59,416 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2020-10-16 02:31:59,417 INFO L481 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 262 flow [2020-10-16 02:31:59,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:31:59,417 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:59,417 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:31:59,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-16 02:31:59,417 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:31:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:31:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash -355906383, now seen corresponding path program 1 times [2020-10-16 02:31:59,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:31:59,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742904910] [2020-10-16 02:31:59,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:31:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:59,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742904910] [2020-10-16 02:31:59,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102777862] [2020-10-16 02:31:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:31:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:31:59,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:31:59,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:31:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:31:59,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:31:59,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:31:59,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722158050] [2020-10-16 02:31:59,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:31:59,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:31:59,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:31:59,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:31:59,557 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:31:59,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 262 flow. Second operand 6 states. [2020-10-16 02:31:59,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:31:59,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:31:59,558 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:31:59,947 INFO L129 PetriNetUnfolder]: 1051/2963 cut-off events. [2020-10-16 02:31:59,947 INFO L130 PetriNetUnfolder]: For 1462/1462 co-relation queries the response was YES. [2020-10-16 02:31:59,953 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7286 conditions, 2963 events. 1051/2963 cut-off events. For 1462/1462 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20845 event pairs, 550 based on Foata normal form. 1/2709 useless extension candidates. Maximal degree in co-relation 3660. Up to 1586 conditions per place. [2020-10-16 02:31:59,964 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 12 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2020-10-16 02:31:59,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 300 flow [2020-10-16 02:31:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:31:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:31:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 494 transitions. [2020-10-16 02:31:59,966 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6639784946236559 [2020-10-16 02:31:59,966 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 494 transitions. [2020-10-16 02:31:59,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 494 transitions. [2020-10-16 02:31:59,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:31:59,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 494 transitions. [2020-10-16 02:31:59,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:31:59,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:31:59,969 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:31:59,969 INFO L185 Difference]: Start difference. First operand has 66 places, 55 transitions, 262 flow. Second operand 4 states and 494 transitions. [2020-10-16 02:31:59,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 300 flow [2020-10-16 02:31:59,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 58 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:31:59,974 INFO L241 Difference]: Finished difference. Result has 69 places, 56 transitions, 277 flow [2020-10-16 02:31:59,975 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2020-10-16 02:31:59,975 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2020-10-16 02:31:59,976 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 277 flow [2020-10-16 02:31:59,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:31:59,976 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:31:59,976 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:00,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 02:32:00,190 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:00,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:00,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1453614924, now seen corresponding path program 1 times [2020-10-16 02:32:00,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:00,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746058814] [2020-10-16 02:32:00,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:00,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746058814] [2020-10-16 02:32:00,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198995979] [2020-10-16 02:32:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:00,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:32:00,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:00,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:00,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 02:32:00,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595033446] [2020-10-16 02:32:00,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:32:00,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:00,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:32:00,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:32:00,362 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:32:00,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 277 flow. Second operand 8 states. [2020-10-16 02:32:00,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:00,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:32:00,363 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:00,643 INFO L129 PetriNetUnfolder]: 1049/2955 cut-off events. [2020-10-16 02:32:00,644 INFO L130 PetriNetUnfolder]: For 1479/1479 co-relation queries the response was YES. [2020-10-16 02:32:00,655 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7283 conditions, 2955 events. 1049/2955 cut-off events. For 1479/1479 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20949 event pairs, 551 based on Foata normal form. 1/2701 useless extension candidates. Maximal degree in co-relation 7240. Up to 1580 conditions per place. [2020-10-16 02:32:00,663 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 13 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2020-10-16 02:32:00,664 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 60 transitions, 323 flow [2020-10-16 02:32:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:32:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:32:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 616 transitions. [2020-10-16 02:32:00,666 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6623655913978495 [2020-10-16 02:32:00,666 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 616 transitions. [2020-10-16 02:32:00,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 616 transitions. [2020-10-16 02:32:00,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:00,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 616 transitions. [2020-10-16 02:32:00,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:32:00,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:32:00,668 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:32:00,668 INFO L185 Difference]: Start difference. First operand has 69 places, 56 transitions, 277 flow. Second operand 5 states and 616 transitions. [2020-10-16 02:32:00,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 60 transitions, 323 flow [2020-10-16 02:32:00,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 60 transitions, 317 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 02:32:00,673 INFO L241 Difference]: Finished difference. Result has 72 places, 57 transitions, 291 flow [2020-10-16 02:32:00,673 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2020-10-16 02:32:00,673 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 12 predicate places. [2020-10-16 02:32:00,673 INFO L481 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 291 flow [2020-10-16 02:32:00,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:32:00,674 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:00,674 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:00,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:00,887 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:00,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1245149690, now seen corresponding path program 1 times [2020-10-16 02:32:00,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:00,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482696884] [2020-10-16 02:32:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:00,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482696884] [2020-10-16 02:32:00,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114445276] [2020-10-16 02:32:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:01,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:32:01,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:01,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:01,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 02:32:01,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843907370] [2020-10-16 02:32:01,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 02:32:01,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:01,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 02:32:01,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 02:32:01,076 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:32:01,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 291 flow. Second operand 10 states. [2020-10-16 02:32:01,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:01,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:32:01,077 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:01,367 INFO L129 PetriNetUnfolder]: 1046/2944 cut-off events. [2020-10-16 02:32:01,367 INFO L130 PetriNetUnfolder]: For 1493/1493 co-relation queries the response was YES. [2020-10-16 02:32:01,379 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7268 conditions, 2944 events. 1046/2944 cut-off events. For 1493/1493 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 21011 event pairs, 555 based on Foata normal form. 1/2690 useless extension candidates. Maximal degree in co-relation 7210. Up to 1573 conditions per place. [2020-10-16 02:32:01,387 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 14 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2020-10-16 02:32:01,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 62 transitions, 345 flow [2020-10-16 02:32:01,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:32:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:32:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2020-10-16 02:32:01,389 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2020-10-16 02:32:01,389 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2020-10-16 02:32:01,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2020-10-16 02:32:01,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:01,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2020-10-16 02:32:01,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:32:01,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:32:01,392 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:32:01,392 INFO L185 Difference]: Start difference. First operand has 72 places, 57 transitions, 291 flow. Second operand 6 states and 738 transitions. [2020-10-16 02:32:01,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 62 transitions, 345 flow [2020-10-16 02:32:01,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 62 transitions, 335 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 02:32:01,398 INFO L241 Difference]: Finished difference. Result has 75 places, 58 transitions, 305 flow [2020-10-16 02:32:01,398 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2020-10-16 02:32:01,398 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 15 predicate places. [2020-10-16 02:32:01,398 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 305 flow [2020-10-16 02:32:01,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 02:32:01,398 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:01,399 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:01,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 02:32:01,612 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:01,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:01,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1295301725, now seen corresponding path program 1 times [2020-10-16 02:32:01,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:01,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392581416] [2020-10-16 02:32:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:01,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392581416] [2020-10-16 02:32:01,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467112312] [2020-10-16 02:32:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:01,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 02:32:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:01,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:01,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 02:32:01,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706710907] [2020-10-16 02:32:01,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 02:32:01,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:01,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 02:32:01,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 02:32:01,954 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:32:01,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 305 flow. Second operand 12 states. [2020-10-16 02:32:01,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:01,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:32:01,955 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:02,423 INFO L129 PetriNetUnfolder]: 1042/2930 cut-off events. [2020-10-16 02:32:02,423 INFO L130 PetriNetUnfolder]: For 1504/1504 co-relation queries the response was YES. [2020-10-16 02:32:02,442 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7242 conditions, 2930 events. 1042/2930 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21244 event pairs, 566 based on Foata normal form. 1/2676 useless extension candidates. Maximal degree in co-relation 7168. Up to 1302 conditions per place. [2020-10-16 02:32:02,455 INFO L132 encePairwiseOnDemand]: 180/186 looper letters, 10 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2020-10-16 02:32:02,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 64 transitions, 367 flow [2020-10-16 02:32:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 02:32:02,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 02:32:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 980 transitions. [2020-10-16 02:32:02,458 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6586021505376344 [2020-10-16 02:32:02,458 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 980 transitions. [2020-10-16 02:32:02,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 980 transitions. [2020-10-16 02:32:02,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:02,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 980 transitions. [2020-10-16 02:32:02,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 02:32:02,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 02:32:02,462 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 02:32:02,462 INFO L185 Difference]: Start difference. First operand has 75 places, 58 transitions, 305 flow. Second operand 8 states and 980 transitions. [2020-10-16 02:32:02,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 64 transitions, 367 flow [2020-10-16 02:32:02,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 64 transitions, 353 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 02:32:02,468 INFO L241 Difference]: Finished difference. Result has 80 places, 60 transitions, 338 flow [2020-10-16 02:32:02,469 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2020-10-16 02:32:02,472 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2020-10-16 02:32:02,472 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 338 flow [2020-10-16 02:32:02,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 02:32:02,472 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:02,472 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:02,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:02,686 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:02,687 INFO L82 PathProgramCache]: Analyzing trace with hash -703139369, now seen corresponding path program 1 times [2020-10-16 02:32:02,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:02,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285772623] [2020-10-16 02:32:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 02:32:02,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285772623] [2020-10-16 02:32:02,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716890046] [2020-10-16 02:32:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:02,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:32:02,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 02:32:02,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:02,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 02:32:02,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305501634] [2020-10-16 02:32:02,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 02:32:02,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:02,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 02:32:02,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 02:32:02,856 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 02:32:02,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 338 flow. Second operand 7 states. [2020-10-16 02:32:02,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:02,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 02:32:02,857 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:03,205 INFO L129 PetriNetUnfolder]: 1108/3347 cut-off events. [2020-10-16 02:32:03,206 INFO L130 PetriNetUnfolder]: For 3282/3282 co-relation queries the response was YES. [2020-10-16 02:32:03,220 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9178 conditions, 3347 events. 1108/3347 cut-off events. For 3282/3282 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 26330 event pairs, 658 based on Foata normal form. 26/3126 useless extension candidates. Maximal degree in co-relation 4638. Up to 1309 conditions per place. [2020-10-16 02:32:03,229 INFO L132 encePairwiseOnDemand]: 179/186 looper letters, 14 selfloop transitions, 9 changer transitions 0/66 dead transitions. [2020-10-16 02:32:03,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 66 transitions, 413 flow [2020-10-16 02:32:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:32:03,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:32:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 621 transitions. [2020-10-16 02:32:03,231 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.667741935483871 [2020-10-16 02:32:03,231 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 621 transitions. [2020-10-16 02:32:03,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 621 transitions. [2020-10-16 02:32:03,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:03,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 621 transitions. [2020-10-16 02:32:03,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:32:03,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:32:03,236 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:32:03,236 INFO L185 Difference]: Start difference. First operand has 80 places, 60 transitions, 338 flow. Second operand 5 states and 621 transitions. [2020-10-16 02:32:03,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 66 transitions, 413 flow [2020-10-16 02:32:03,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 66 transitions, 389 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-16 02:32:03,247 INFO L241 Difference]: Finished difference. Result has 81 places, 62 transitions, 355 flow [2020-10-16 02:32:03,247 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2020-10-16 02:32:03,247 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 21 predicate places. [2020-10-16 02:32:03,247 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 355 flow [2020-10-16 02:32:03,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 02:32:03,248 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:03,248 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:03,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 02:32:03,456 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:03,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:03,456 INFO L82 PathProgramCache]: Analyzing trace with hash -436182876, now seen corresponding path program 1 times [2020-10-16 02:32:03,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:03,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338403669] [2020-10-16 02:32:03,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:32:03,468 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:32:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:32:03,476 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:32:03,483 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:32:03,483 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:32:03,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-16 02:32:03,483 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:32:03,484 WARN L371 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:32:03,484 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2020-10-16 02:32:03,496 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,496 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,496 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,496 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,497 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,497 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,497 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,497 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,497 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,497 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,497 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,498 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,498 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,498 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,498 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,498 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,498 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,498 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,499 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,499 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,499 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,499 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,499 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,499 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,499 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,500 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,500 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,500 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,500 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,500 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,500 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,500 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,501 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,501 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,501 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,501 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,501 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,501 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,501 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,502 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,502 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,502 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,502 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,502 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,502 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,502 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,502 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,503 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,503 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,503 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,503 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,503 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,503 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,503 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,504 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,504 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,504 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,504 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,504 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,504 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,504 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,505 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,505 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,505 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,505 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,505 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,505 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,506 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,507 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,507 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,507 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,507 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,508 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,509 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,509 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,509 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,510 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,510 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,511 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,511 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,511 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,511 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,511 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,512 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,513 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,513 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,513 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,513 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,514 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,514 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,514 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,514 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,514 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,516 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,516 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,516 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,516 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,516 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,517 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,518 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,518 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,518 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,518 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,519 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,519 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,519 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,519 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,520 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:03,526 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:32:03,526 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:32:03,527 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:32:03,527 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:32:03,527 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:32:03,527 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:32:03,527 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:32:03,527 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:32:03,527 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:32:03,528 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 131 places, 127 transitions, 398 flow [2020-10-16 02:32:06,308 INFO L129 PetriNetUnfolder]: 3861/18336 cut-off events. [2020-10-16 02:32:06,308 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 02:32:06,375 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20713 conditions, 18336 events. 3861/18336 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 205615 event pairs, 1291 based on Foata normal form. 0/15243 useless extension candidates. Maximal degree in co-relation 10172. Up to 2304 conditions per place. [2020-10-16 02:32:06,375 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 127 transitions, 398 flow [2020-10-16 02:32:06,408 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 120 transitions, 384 flow [2020-10-16 02:32:06,408 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:32:06,408 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 120 transitions, 384 flow [2020-10-16 02:32:06,408 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 120 transitions, 384 flow [2020-10-16 02:32:06,408 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 125 places, 120 transitions, 384 flow [2020-10-16 02:32:07,876 INFO L129 PetriNetUnfolder]: 3349/14752 cut-off events. [2020-10-16 02:32:07,877 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 02:32:07,917 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17129 conditions, 14752 events. 3349/14752 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 156456 event pairs, 1291 based on Foata normal form. 0/12683 useless extension candidates. Maximal degree in co-relation 8380. Up to 2304 conditions per place. [2020-10-16 02:32:08,115 INFO L117 LiptonReduction]: Number of co-enabled transitions 5940 [2020-10-16 02:32:09,832 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-16 02:32:09,993 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 02:32:10,015 INFO L132 LiptonReduction]: Checked pairs total: 28628 [2020-10-16 02:32:10,015 INFO L134 LiptonReduction]: Total number of compositions: 71 [2020-10-16 02:32:10,015 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 3607 [2020-10-16 02:32:10,016 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 02:32:10,016 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:32:10,016 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:10,016 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:32:10,017 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:10,017 INFO L82 PathProgramCache]: Analyzing trace with hash 50460177, now seen corresponding path program 1 times [2020-10-16 02:32:10,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:10,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117442149] [2020-10-16 02:32:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:32:10,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117442149] [2020-10-16 02:32:10,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:32:10,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:32:10,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261417310] [2020-10-16 02:32:10,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:32:10,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:10,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:32:10,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:32:10,036 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:10,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 258 flow. Second operand 3 states. [2020-10-16 02:32:10,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:10,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:10,037 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:10,561 INFO L129 PetriNetUnfolder]: 2313/5449 cut-off events. [2020-10-16 02:32:10,561 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 02:32:10,594 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10415 conditions, 5449 events. 2313/5449 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 39806 event pairs, 1291 based on Foata normal form. 0/4416 useless extension candidates. Maximal degree in co-relation 5018. Up to 2587 conditions per place. [2020-10-16 02:32:10,620 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 9 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2020-10-16 02:32:10,620 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 284 flow [2020-10-16 02:32:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:32:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:32:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2020-10-16 02:32:10,621 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2020-10-16 02:32:10,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2020-10-16 02:32:10,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2020-10-16 02:32:10,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:10,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2020-10-16 02:32:10,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:32:10,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:32:10,624 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:32:10,624 INFO L185 Difference]: Start difference. First operand has 66 places, 57 transitions, 258 flow. Second operand 3 states and 402 transitions. [2020-10-16 02:32:10,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 284 flow [2020-10-16 02:32:10,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:32:10,629 INFO L241 Difference]: Finished difference. Result has 69 places, 58 transitions, 270 flow [2020-10-16 02:32:10,629 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2020-10-16 02:32:10,629 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2020-10-16 02:32:10,629 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 270 flow [2020-10-16 02:32:10,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:32:10,629 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:10,630 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:10,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-16 02:32:10,630 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:10,630 INFO L82 PathProgramCache]: Analyzing trace with hash -93476314, now seen corresponding path program 1 times [2020-10-16 02:32:10,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:10,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395532585] [2020-10-16 02:32:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:32:10,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395532585] [2020-10-16 02:32:10,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:32:10,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:32:10,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542923528] [2020-10-16 02:32:10,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:32:10,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:10,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:32:10,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:32:10,659 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:10,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 270 flow. Second operand 4 states. [2020-10-16 02:32:10,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:10,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:10,660 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:11,179 INFO L129 PetriNetUnfolder]: 2340/6073 cut-off events. [2020-10-16 02:32:11,179 INFO L130 PetriNetUnfolder]: For 2505/2505 co-relation queries the response was YES. [2020-10-16 02:32:11,203 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11649 conditions, 6073 events. 2340/6073 cut-off events. For 2505/2505 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47741 event pairs, 1327 based on Foata normal form. 0/5051 useless extension candidates. Maximal degree in co-relation 11623. Up to 2609 conditions per place. [2020-10-16 02:32:11,221 INFO L132 encePairwiseOnDemand]: 191/198 looper letters, 8 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2020-10-16 02:32:11,222 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 62 transitions, 306 flow [2020-10-16 02:32:11,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:32:11,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:32:11,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 536 transitions. [2020-10-16 02:32:11,223 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2020-10-16 02:32:11,223 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 536 transitions. [2020-10-16 02:32:11,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 536 transitions. [2020-10-16 02:32:11,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:11,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 536 transitions. [2020-10-16 02:32:11,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:32:11,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:32:11,225 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:32:11,225 INFO L185 Difference]: Start difference. First operand has 69 places, 58 transitions, 270 flow. Second operand 4 states and 536 transitions. [2020-10-16 02:32:11,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 62 transitions, 306 flow [2020-10-16 02:32:11,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:32:11,228 INFO L241 Difference]: Finished difference. Result has 72 places, 60 transitions, 296 flow [2020-10-16 02:32:11,229 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2020-10-16 02:32:11,229 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2020-10-16 02:32:11,229 INFO L481 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 296 flow [2020-10-16 02:32:11,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:32:11,229 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:11,229 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:11,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-16 02:32:11,230 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:11,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:11,230 INFO L82 PathProgramCache]: Analyzing trace with hash 637668557, now seen corresponding path program 1 times [2020-10-16 02:32:11,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:11,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12796667] [2020-10-16 02:32:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:11,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12796667] [2020-10-16 02:32:11,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64430305] [2020-10-16 02:32:11,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:11,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:32:11,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:11,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:11,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:32:11,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10773619] [2020-10-16 02:32:11,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:32:11,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:11,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:32:11,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:32:11,390 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:11,391 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 296 flow. Second operand 6 states. [2020-10-16 02:32:11,391 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:11,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:11,391 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:11,914 INFO L129 PetriNetUnfolder]: 2339/6068 cut-off events. [2020-10-16 02:32:11,914 INFO L130 PetriNetUnfolder]: For 3060/3060 co-relation queries the response was YES. [2020-10-16 02:32:11,942 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14795 conditions, 6068 events. 2339/6068 cut-off events. For 3060/3060 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47628 event pairs, 1327 based on Foata normal form. 1/5558 useless extension candidates. Maximal degree in co-relation 7510. Up to 3134 conditions per place. [2020-10-16 02:32:11,962 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 12 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2020-10-16 02:32:11,962 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 334 flow [2020-10-16 02:32:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:32:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:32:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 534 transitions. [2020-10-16 02:32:11,963 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2020-10-16 02:32:11,963 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 534 transitions. [2020-10-16 02:32:11,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 534 transitions. [2020-10-16 02:32:11,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:11,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 534 transitions. [2020-10-16 02:32:11,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:32:11,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:32:11,965 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:32:11,965 INFO L185 Difference]: Start difference. First operand has 72 places, 60 transitions, 296 flow. Second operand 4 states and 534 transitions. [2020-10-16 02:32:11,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 334 flow [2020-10-16 02:32:11,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 63 transitions, 333 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:32:11,970 INFO L241 Difference]: Finished difference. Result has 75 places, 61 transitions, 311 flow [2020-10-16 02:32:11,971 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2020-10-16 02:32:11,971 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2020-10-16 02:32:11,971 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 311 flow [2020-10-16 02:32:11,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:32:11,971 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:11,971 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:12,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:12,185 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:12,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:12,185 INFO L82 PathProgramCache]: Analyzing trace with hash -400747775, now seen corresponding path program 1 times [2020-10-16 02:32:12,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:12,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486677852] [2020-10-16 02:32:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:12,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486677852] [2020-10-16 02:32:12,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590449975] [2020-10-16 02:32:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:12,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:12,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:32:12,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:12,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:12,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 02:32:12,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941172923] [2020-10-16 02:32:12,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:32:12,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:12,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:32:12,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:32:12,362 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:12,362 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 311 flow. Second operand 8 states. [2020-10-16 02:32:12,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:12,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:12,363 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:12,946 INFO L129 PetriNetUnfolder]: 2337/6060 cut-off events. [2020-10-16 02:32:12,946 INFO L130 PetriNetUnfolder]: For 3079/3079 co-relation queries the response was YES. [2020-10-16 02:32:12,973 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14794 conditions, 6060 events. 2337/6060 cut-off events. For 3079/3079 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47598 event pairs, 1328 based on Foata normal form. 1/5550 useless extension candidates. Maximal degree in co-relation 14750. Up to 3128 conditions per place. [2020-10-16 02:32:12,992 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 13 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2020-10-16 02:32:12,992 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 357 flow [2020-10-16 02:32:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:32:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:32:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 666 transitions. [2020-10-16 02:32:12,993 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2020-10-16 02:32:12,994 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 666 transitions. [2020-10-16 02:32:12,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 666 transitions. [2020-10-16 02:32:12,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:12,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 666 transitions. [2020-10-16 02:32:12,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:32:12,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:32:12,995 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:32:12,995 INFO L185 Difference]: Start difference. First operand has 75 places, 61 transitions, 311 flow. Second operand 5 states and 666 transitions. [2020-10-16 02:32:12,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 357 flow [2020-10-16 02:32:12,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 65 transitions, 351 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 02:32:13,000 INFO L241 Difference]: Finished difference. Result has 78 places, 62 transitions, 325 flow [2020-10-16 02:32:13,000 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=78, PETRI_TRANSITIONS=62} [2020-10-16 02:32:13,000 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2020-10-16 02:32:13,001 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 62 transitions, 325 flow [2020-10-16 02:32:13,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:32:13,001 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:13,001 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:13,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 02:32:13,207 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:13,207 INFO L82 PathProgramCache]: Analyzing trace with hash 475549348, now seen corresponding path program 1 times [2020-10-16 02:32:13,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:13,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154277394] [2020-10-16 02:32:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:13,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154277394] [2020-10-16 02:32:13,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341674024] [2020-10-16 02:32:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:13,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:13,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:32:13,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:13,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:13,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 02:32:13,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316549459] [2020-10-16 02:32:13,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 02:32:13,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:13,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 02:32:13,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 02:32:13,423 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:13,424 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 62 transitions, 325 flow. Second operand 10 states. [2020-10-16 02:32:13,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:13,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:13,425 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:13,975 INFO L129 PetriNetUnfolder]: 2334/6049 cut-off events. [2020-10-16 02:32:13,975 INFO L130 PetriNetUnfolder]: For 3096/3096 co-relation queries the response was YES. [2020-10-16 02:32:14,005 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14781 conditions, 6049 events. 2334/6049 cut-off events. For 3096/3096 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47816 event pairs, 1332 based on Foata normal form. 1/5539 useless extension candidates. Maximal degree in co-relation 14722. Up to 3121 conditions per place. [2020-10-16 02:32:14,025 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 14 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2020-10-16 02:32:14,025 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 67 transitions, 379 flow [2020-10-16 02:32:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:32:14,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:32:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 798 transitions. [2020-10-16 02:32:14,027 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6717171717171717 [2020-10-16 02:32:14,027 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 798 transitions. [2020-10-16 02:32:14,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 798 transitions. [2020-10-16 02:32:14,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:14,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 798 transitions. [2020-10-16 02:32:14,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:32:14,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:32:14,029 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:32:14,029 INFO L185 Difference]: Start difference. First operand has 78 places, 62 transitions, 325 flow. Second operand 6 states and 798 transitions. [2020-10-16 02:32:14,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 67 transitions, 379 flow [2020-10-16 02:32:14,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 67 transitions, 369 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 02:32:14,033 INFO L241 Difference]: Finished difference. Result has 81 places, 63 transitions, 339 flow [2020-10-16 02:32:14,033 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2020-10-16 02:32:14,033 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2020-10-16 02:32:14,033 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 339 flow [2020-10-16 02:32:14,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 02:32:14,033 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:14,033 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:14,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-10-16 02:32:14,234 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:14,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:14,235 INFO L82 PathProgramCache]: Analyzing trace with hash 873129670, now seen corresponding path program 1 times [2020-10-16 02:32:14,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:14,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461000606] [2020-10-16 02:32:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:14,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461000606] [2020-10-16 02:32:14,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939992952] [2020-10-16 02:32:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:14,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 02:32:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:14,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:14,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 02:32:14,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837400516] [2020-10-16 02:32:14,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 02:32:14,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:14,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 02:32:14,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 02:32:14,510 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:14,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 339 flow. Second operand 12 states. [2020-10-16 02:32:14,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:14,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:14,512 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:15,494 INFO L129 PetriNetUnfolder]: 2330/6035 cut-off events. [2020-10-16 02:32:15,494 INFO L130 PetriNetUnfolder]: For 3111/3111 co-relation queries the response was YES. [2020-10-16 02:32:15,520 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14757 conditions, 6035 events. 2330/6035 cut-off events. For 3111/3111 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 48189 event pairs, 1343 based on Foata normal form. 1/5525 useless extension candidates. Maximal degree in co-relation 14682. Up to 2592 conditions per place. [2020-10-16 02:32:15,539 INFO L132 encePairwiseOnDemand]: 192/198 looper letters, 10 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2020-10-16 02:32:15,539 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 69 transitions, 401 flow [2020-10-16 02:32:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 02:32:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 02:32:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1060 transitions. [2020-10-16 02:32:15,541 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6691919191919192 [2020-10-16 02:32:15,541 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1060 transitions. [2020-10-16 02:32:15,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1060 transitions. [2020-10-16 02:32:15,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:15,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1060 transitions. [2020-10-16 02:32:15,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 02:32:15,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 02:32:15,544 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 02:32:15,544 INFO L185 Difference]: Start difference. First operand has 81 places, 63 transitions, 339 flow. Second operand 8 states and 1060 transitions. [2020-10-16 02:32:15,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 69 transitions, 401 flow [2020-10-16 02:32:15,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 69 transitions, 387 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 02:32:15,553 INFO L241 Difference]: Finished difference. Result has 86 places, 65 transitions, 372 flow [2020-10-16 02:32:15,553 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=372, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2020-10-16 02:32:15,554 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 20 predicate places. [2020-10-16 02:32:15,554 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 372 flow [2020-10-16 02:32:15,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 02:32:15,554 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:15,554 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:15,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:15,768 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash 921562965, now seen corresponding path program 1 times [2020-10-16 02:32:15,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:15,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551840268] [2020-10-16 02:32:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 02:32:15,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551840268] [2020-10-16 02:32:15,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101846170] [2020-10-16 02:32:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:15,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:32:15,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 02:32:15,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:15,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 02:32:15,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256124295] [2020-10-16 02:32:15,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 02:32:15,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:15,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 02:32:15,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 02:32:15,941 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 02:32:15,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 372 flow. Second operand 7 states. [2020-10-16 02:32:15,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:15,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 02:32:15,942 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:16,619 INFO L129 PetriNetUnfolder]: 2443/6823 cut-off events. [2020-10-16 02:32:16,619 INFO L130 PetriNetUnfolder]: For 6446/6446 co-relation queries the response was YES. [2020-10-16 02:32:16,656 INFO L80 FinitePrefix]: Finished finitePrefix Result has 18511 conditions, 6823 events. 2443/6823 cut-off events. For 6446/6446 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 58647 event pairs, 1491 based on Foata normal form. 35/6356 useless extension candidates. Maximal degree in co-relation 9324. Up to 2621 conditions per place. [2020-10-16 02:32:16,678 INFO L132 encePairwiseOnDemand]: 191/198 looper letters, 14 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2020-10-16 02:32:16,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 71 transitions, 447 flow [2020-10-16 02:32:16,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:32:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:32:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 671 transitions. [2020-10-16 02:32:16,680 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2020-10-16 02:32:16,680 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 671 transitions. [2020-10-16 02:32:16,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 671 transitions. [2020-10-16 02:32:16,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:16,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 671 transitions. [2020-10-16 02:32:16,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:32:16,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:32:16,682 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:32:16,682 INFO L185 Difference]: Start difference. First operand has 86 places, 65 transitions, 372 flow. Second operand 5 states and 671 transitions. [2020-10-16 02:32:16,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 71 transitions, 447 flow [2020-10-16 02:32:16,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 71 transitions, 423 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-16 02:32:16,696 INFO L241 Difference]: Finished difference. Result has 87 places, 67 transitions, 389 flow [2020-10-16 02:32:16,696 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=87, PETRI_TRANSITIONS=67} [2020-10-16 02:32:16,696 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 21 predicate places. [2020-10-16 02:32:16,697 INFO L481 AbstractCegarLoop]: Abstraction has has 87 places, 67 transitions, 389 flow [2020-10-16 02:32:16,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 02:32:16,697 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:16,697 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:16,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-16 02:32:16,898 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:16,898 INFO L82 PathProgramCache]: Analyzing trace with hash 2001719838, now seen corresponding path program 1 times [2020-10-16 02:32:16,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:16,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186572460] [2020-10-16 02:32:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:32:16,913 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:32:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 02:32:16,920 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 02:32:16,927 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 02:32:16,928 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 02:32:16,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-16 02:32:16,929 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 02:32:16,929 WARN L371 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 02:32:16,931 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2020-10-16 02:32:16,943 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,943 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,944 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,944 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,944 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,944 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,944 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,944 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,944 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,944 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,945 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,945 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,945 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,945 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,945 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,945 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,945 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,946 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,946 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,946 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,946 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,946 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,946 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,946 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,946 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,946 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,947 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,947 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,947 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,947 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,947 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,947 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,947 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,948 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,948 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,948 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,948 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,948 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,948 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,948 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,948 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,949 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,956 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,956 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,956 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,956 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,957 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,957 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,957 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,957 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,958 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,958 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,958 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,958 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,958 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,958 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,958 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,958 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,959 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,959 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,959 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,959 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,959 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,959 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,959 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,959 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,960 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,960 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,960 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,960 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,960 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,961 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,961 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,961 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,961 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,962 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,962 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,962 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,963 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,963 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,964 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,964 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,964 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,964 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,964 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,965 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,965 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,966 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,966 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,966 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,967 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,967 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,967 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,967 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,967 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,968 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,968 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,969 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,969 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,969 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,970 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,970 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,970 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,970 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,971 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,972 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,972 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,972 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,972 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,972 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,974 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,974 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,974 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,974 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,974 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,975 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,975 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,975 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,976 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,976 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:32:16,983 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 02:32:16,983 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:32:16,983 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:32:16,984 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:32:16,984 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:32:16,984 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:32:16,984 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:32:16,984 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:32:16,984 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:32:16,985 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 139 places, 134 transitions, 438 flow [2020-10-16 02:32:21,079 INFO L129 PetriNetUnfolder]: 8215/37039 cut-off events. [2020-10-16 02:32:21,079 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-16 02:32:21,355 INFO L80 FinitePrefix]: Finished finitePrefix Result has 42245 conditions, 37039 events. 8215/37039 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 468035 event pairs, 3084 based on Foata normal form. 0/30872 useless extension candidates. Maximal degree in co-relation 20694. Up to 5120 conditions per place. [2020-10-16 02:32:21,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 134 transitions, 438 flow [2020-10-16 02:32:21,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 127 transitions, 424 flow [2020-10-16 02:32:21,436 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:32:21,436 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 127 transitions, 424 flow [2020-10-16 02:32:21,436 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 127 transitions, 424 flow [2020-10-16 02:32:21,436 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 133 places, 127 transitions, 424 flow [2020-10-16 02:32:25,441 INFO L129 PetriNetUnfolder]: 7191/29871 cut-off events. [2020-10-16 02:32:25,442 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-16 02:32:25,689 INFO L80 FinitePrefix]: Finished finitePrefix Result has 35077 conditions, 29871 events. 7191/29871 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 356661 event pairs, 3084 based on Foata normal form. 0/25752 useless extension candidates. Maximal degree in co-relation 17110. Up to 5120 conditions per place. [2020-10-16 02:32:26,465 INFO L117 LiptonReduction]: Number of co-enabled transitions 7000 [2020-10-16 02:32:28,969 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-16 02:32:29,226 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-16 02:32:29,311 INFO L132 LiptonReduction]: Checked pairs total: 33303 [2020-10-16 02:32:29,311 INFO L134 LiptonReduction]: Total number of compositions: 69 [2020-10-16 02:32:29,312 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 7876 [2020-10-16 02:32:29,313 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 02:32:29,313 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 02:32:29,313 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:29,313 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 02:32:29,313 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:29,313 INFO L82 PathProgramCache]: Analyzing trace with hash 56928945, now seen corresponding path program 1 times [2020-10-16 02:32:29,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:29,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195834137] [2020-10-16 02:32:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:32:29,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195834137] [2020-10-16 02:32:29,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:32:29,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 02:32:29,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530723092] [2020-10-16 02:32:29,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:32:29,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:29,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:32:29,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:32:29,327 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:29,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 294 flow. Second operand 3 states. [2020-10-16 02:32:29,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:29,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:29,328 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:30,382 INFO L129 PetriNetUnfolder]: 5130/11345 cut-off events. [2020-10-16 02:32:30,382 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-16 02:32:30,440 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21703 conditions, 11345 events. 5130/11345 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 91343 event pairs, 3084 based on Foata normal form. 0/9287 useless extension candidates. Maximal degree in co-relation 10417. Up to 5150 conditions per place. [2020-10-16 02:32:30,482 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 9 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2020-10-16 02:32:30,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 320 flow [2020-10-16 02:32:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:32:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:32:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2020-10-16 02:32:30,483 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6995073891625616 [2020-10-16 02:32:30,483 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2020-10-16 02:32:30,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2020-10-16 02:32:30,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:30,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2020-10-16 02:32:30,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:32:30,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:32:30,485 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:32:30,485 INFO L185 Difference]: Start difference. First operand has 72 places, 62 transitions, 294 flow. Second operand 3 states and 426 transitions. [2020-10-16 02:32:30,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 320 flow [2020-10-16 02:32:30,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 64 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 02:32:30,492 INFO L241 Difference]: Finished difference. Result has 75 places, 63 transitions, 306 flow [2020-10-16 02:32:30,493 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2020-10-16 02:32:30,493 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2020-10-16 02:32:30,493 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 306 flow [2020-10-16 02:32:30,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:32:30,493 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:30,493 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:30,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-16 02:32:30,493 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:30,493 INFO L82 PathProgramCache]: Analyzing trace with hash 277330913, now seen corresponding path program 1 times [2020-10-16 02:32:30,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:30,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897399582] [2020-10-16 02:32:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:32:30,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897399582] [2020-10-16 02:32:30,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:32:30,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:32:30,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075904442] [2020-10-16 02:32:30,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 02:32:30,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:30,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 02:32:30,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 02:32:30,512 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:30,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 306 flow. Second operand 4 states. [2020-10-16 02:32:30,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:30,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:30,512 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:31,846 INFO L129 PetriNetUnfolder]: 5165/12509 cut-off events. [2020-10-16 02:32:31,846 INFO L130 PetriNetUnfolder]: For 5385/5385 co-relation queries the response was YES. [2020-10-16 02:32:31,903 INFO L80 FinitePrefix]: Finished finitePrefix Result has 24010 conditions, 12509 events. 5165/12509 cut-off events. For 5385/5385 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108501 event pairs, 3129 based on Foata normal form. 0/10463 useless extension candidates. Maximal degree in co-relation 23983. Up to 5180 conditions per place. [2020-10-16 02:32:31,942 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 8 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2020-10-16 02:32:31,942 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 67 transitions, 342 flow [2020-10-16 02:32:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:32:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:32:31,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 568 transitions. [2020-10-16 02:32:31,944 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6995073891625616 [2020-10-16 02:32:31,944 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 568 transitions. [2020-10-16 02:32:31,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 568 transitions. [2020-10-16 02:32:31,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:31,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 568 transitions. [2020-10-16 02:32:31,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:32:31,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:32:31,946 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:32:31,946 INFO L185 Difference]: Start difference. First operand has 75 places, 63 transitions, 306 flow. Second operand 4 states and 568 transitions. [2020-10-16 02:32:31,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 67 transitions, 342 flow [2020-10-16 02:32:31,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:32:31,954 INFO L241 Difference]: Finished difference. Result has 78 places, 65 transitions, 332 flow [2020-10-16 02:32:31,954 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2020-10-16 02:32:31,954 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2020-10-16 02:32:31,954 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 332 flow [2020-10-16 02:32:31,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 02:32:31,954 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:31,954 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:31,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-16 02:32:31,954 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:31,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:31,955 INFO L82 PathProgramCache]: Analyzing trace with hash -190386445, now seen corresponding path program 1 times [2020-10-16 02:32:31,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:31,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986355791] [2020-10-16 02:32:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:31,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986355791] [2020-10-16 02:32:31,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143655291] [2020-10-16 02:32:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:32,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:32:32,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:32,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:32,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 02:32:32,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019775256] [2020-10-16 02:32:32,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:32:32,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:32,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:32:32,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:32:32,115 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:32,115 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 332 flow. Second operand 6 states. [2020-10-16 02:32:32,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:32,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:32,115 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:33,247 INFO L129 PetriNetUnfolder]: 5164/12504 cut-off events. [2020-10-16 02:32:33,248 INFO L130 PetriNetUnfolder]: For 6462/6462 co-relation queries the response was YES. [2020-10-16 02:32:33,324 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30248 conditions, 12504 events. 5164/12504 cut-off events. For 6462/6462 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108070 event pairs, 3129 based on Foata normal form. 1/11482 useless extension candidates. Maximal degree in co-relation 15456. Up to 6219 conditions per place. [2020-10-16 02:32:33,371 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 12 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2020-10-16 02:32:33,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 68 transitions, 370 flow [2020-10-16 02:32:33,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:32:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:32:33,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2020-10-16 02:32:33,373 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6970443349753694 [2020-10-16 02:32:33,373 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2020-10-16 02:32:33,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2020-10-16 02:32:33,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:33,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2020-10-16 02:32:33,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:32:33,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:32:33,375 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:32:33,375 INFO L185 Difference]: Start difference. First operand has 78 places, 65 transitions, 332 flow. Second operand 4 states and 566 transitions. [2020-10-16 02:32:33,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 68 transitions, 370 flow [2020-10-16 02:32:33,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 68 transitions, 369 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:32:33,384 INFO L241 Difference]: Finished difference. Result has 81 places, 66 transitions, 347 flow [2020-10-16 02:32:33,385 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=347, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2020-10-16 02:32:33,385 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2020-10-16 02:32:33,385 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 347 flow [2020-10-16 02:32:33,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:32:33,385 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:33,385 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:33,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 02:32:33,597 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:33,597 INFO L82 PathProgramCache]: Analyzing trace with hash 495797898, now seen corresponding path program 1 times [2020-10-16 02:32:33,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:33,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977037213] [2020-10-16 02:32:33,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:33,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977037213] [2020-10-16 02:32:33,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620630289] [2020-10-16 02:32:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:33,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:32:33,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:33,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:33,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 02:32:33,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294429946] [2020-10-16 02:32:33,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:32:33,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:33,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:32:33,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:32:33,797 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:33,798 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 347 flow. Second operand 8 states. [2020-10-16 02:32:33,798 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:33,798 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:33,798 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:34,947 INFO L129 PetriNetUnfolder]: 5162/12496 cut-off events. [2020-10-16 02:32:34,947 INFO L130 PetriNetUnfolder]: For 6483/6483 co-relation queries the response was YES. [2020-10-16 02:32:35,029 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30249 conditions, 12496 events. 5162/12496 cut-off events. For 6483/6483 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108143 event pairs, 3130 based on Foata normal form. 1/11474 useless extension candidates. Maximal degree in co-relation 30204. Up to 6213 conditions per place. [2020-10-16 02:32:35,075 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 13 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2020-10-16 02:32:35,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 70 transitions, 393 flow [2020-10-16 02:32:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:32:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:32:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 706 transitions. [2020-10-16 02:32:35,077 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6955665024630542 [2020-10-16 02:32:35,077 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 706 transitions. [2020-10-16 02:32:35,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 706 transitions. [2020-10-16 02:32:35,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:35,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 706 transitions. [2020-10-16 02:32:35,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:32:35,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:32:35,079 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:32:35,079 INFO L185 Difference]: Start difference. First operand has 81 places, 66 transitions, 347 flow. Second operand 5 states and 706 transitions. [2020-10-16 02:32:35,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 70 transitions, 393 flow [2020-10-16 02:32:35,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 70 transitions, 387 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 02:32:35,087 INFO L241 Difference]: Finished difference. Result has 84 places, 67 transitions, 361 flow [2020-10-16 02:32:35,088 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2020-10-16 02:32:35,088 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 12 predicate places. [2020-10-16 02:32:35,088 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 361 flow [2020-10-16 02:32:35,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:32:35,088 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:35,088 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:35,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:35,297 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:35,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:35,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1773387480, now seen corresponding path program 1 times [2020-10-16 02:32:35,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:35,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922201858] [2020-10-16 02:32:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:35,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922201858] [2020-10-16 02:32:35,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522632430] [2020-10-16 02:32:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:35,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:32:35,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:35,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:35,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 02:32:35,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490985049] [2020-10-16 02:32:35,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 02:32:35,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:35,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 02:32:35,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 02:32:35,508 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:35,509 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 67 transitions, 361 flow. Second operand 10 states. [2020-10-16 02:32:35,509 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:35,509 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:35,509 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:36,921 INFO L129 PetriNetUnfolder]: 5159/12485 cut-off events. [2020-10-16 02:32:36,921 INFO L130 PetriNetUnfolder]: For 6503/6503 co-relation queries the response was YES. [2020-10-16 02:32:36,966 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30238 conditions, 12485 events. 5159/12485 cut-off events. For 6503/6503 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108249 event pairs, 3134 based on Foata normal form. 1/11463 useless extension candidates. Maximal degree in co-relation 30178. Up to 6206 conditions per place. [2020-10-16 02:32:37,005 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 14 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2020-10-16 02:32:37,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 72 transitions, 415 flow [2020-10-16 02:32:37,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:32:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:32:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 846 transitions. [2020-10-16 02:32:37,007 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6945812807881774 [2020-10-16 02:32:37,007 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 846 transitions. [2020-10-16 02:32:37,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 846 transitions. [2020-10-16 02:32:37,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:37,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 846 transitions. [2020-10-16 02:32:37,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:32:37,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:32:37,009 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:32:37,009 INFO L185 Difference]: Start difference. First operand has 84 places, 67 transitions, 361 flow. Second operand 6 states and 846 transitions. [2020-10-16 02:32:37,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 72 transitions, 415 flow [2020-10-16 02:32:37,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 72 transitions, 405 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 02:32:37,017 INFO L241 Difference]: Finished difference. Result has 87 places, 68 transitions, 375 flow [2020-10-16 02:32:37,017 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=87, PETRI_TRANSITIONS=68} [2020-10-16 02:32:37,017 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2020-10-16 02:32:37,017 INFO L481 AbstractCegarLoop]: Abstraction has has 87 places, 68 transitions, 375 flow [2020-10-16 02:32:37,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 02:32:37,017 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:37,017 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:37,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:37,218 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:37,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:37,219 INFO L82 PathProgramCache]: Analyzing trace with hash 43326697, now seen corresponding path program 1 times [2020-10-16 02:32:37,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:37,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40560946] [2020-10-16 02:32:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:37,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40560946] [2020-10-16 02:32:37,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792235884] [2020-10-16 02:32:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:37,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 02:32:37,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:32:37,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:37,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 02:32:37,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980596393] [2020-10-16 02:32:37,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 02:32:37,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:37,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 02:32:37,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 02:32:37,465 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:37,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 68 transitions, 375 flow. Second operand 12 states. [2020-10-16 02:32:37,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:37,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:37,466 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:38,685 INFO L129 PetriNetUnfolder]: 5155/12471 cut-off events. [2020-10-16 02:32:38,686 INFO L130 PetriNetUnfolder]: For 6522/6522 co-relation queries the response was YES. [2020-10-16 02:32:38,766 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30216 conditions, 12471 events. 5155/12471 cut-off events. For 6522/6522 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108601 event pairs, 3145 based on Foata normal form. 1/11449 useless extension candidates. Maximal degree in co-relation 30140. Up to 5163 conditions per place. [2020-10-16 02:32:38,812 INFO L132 encePairwiseOnDemand]: 197/203 looper letters, 10 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2020-10-16 02:32:38,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 74 transitions, 437 flow [2020-10-16 02:32:38,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 02:32:38,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 02:32:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1124 transitions. [2020-10-16 02:32:38,814 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6921182266009852 [2020-10-16 02:32:38,814 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1124 transitions. [2020-10-16 02:32:38,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1124 transitions. [2020-10-16 02:32:38,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:38,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1124 transitions. [2020-10-16 02:32:38,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 02:32:38,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 02:32:38,817 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 02:32:38,817 INFO L185 Difference]: Start difference. First operand has 87 places, 68 transitions, 375 flow. Second operand 8 states and 1124 transitions. [2020-10-16 02:32:38,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 74 transitions, 437 flow [2020-10-16 02:32:38,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 74 transitions, 423 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 02:32:38,828 INFO L241 Difference]: Finished difference. Result has 92 places, 70 transitions, 408 flow [2020-10-16 02:32:38,828 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=408, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2020-10-16 02:32:38,828 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 20 predicate places. [2020-10-16 02:32:38,828 INFO L481 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 408 flow [2020-10-16 02:32:38,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 02:32:38,828 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:38,828 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:39,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:39,035 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:39,035 INFO L82 PathProgramCache]: Analyzing trace with hash 594075057, now seen corresponding path program 1 times [2020-10-16 02:32:39,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:39,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456423192] [2020-10-16 02:32:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 02:32:39,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456423192] [2020-10-16 02:32:39,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454483510] [2020-10-16 02:32:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:32:39,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 02:32:39,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:39,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 02:32:39,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395541083] [2020-10-16 02:32:39,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 02:32:39,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 02:32:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 02:32:39,207 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:39,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 408 flow. Second operand 7 states. [2020-10-16 02:32:39,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:39,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:39,208 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:40,734 INFO L129 PetriNetUnfolder]: 5330/13919 cut-off events. [2020-10-16 02:32:40,734 INFO L130 PetriNetUnfolder]: For 12763/12763 co-relation queries the response was YES. [2020-10-16 02:32:40,815 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37401 conditions, 13919 events. 5330/13919 cut-off events. For 12763/12763 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 130019 event pairs, 3365 based on Foata normal form. 45/12951 useless extension candidates. Maximal degree in co-relation 18883. Up to 5375 conditions per place. [2020-10-16 02:32:40,861 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 14 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2020-10-16 02:32:40,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 76 transitions, 483 flow [2020-10-16 02:32:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:32:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:32:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 711 transitions. [2020-10-16 02:32:40,862 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7004926108374384 [2020-10-16 02:32:40,862 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 711 transitions. [2020-10-16 02:32:40,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 711 transitions. [2020-10-16 02:32:40,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:40,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 711 transitions. [2020-10-16 02:32:40,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:32:40,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:32:40,864 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:32:40,864 INFO L185 Difference]: Start difference. First operand has 92 places, 70 transitions, 408 flow. Second operand 5 states and 711 transitions. [2020-10-16 02:32:40,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 76 transitions, 483 flow [2020-10-16 02:32:40,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 76 transitions, 459 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-16 02:32:40,888 INFO L241 Difference]: Finished difference. Result has 93 places, 72 transitions, 425 flow [2020-10-16 02:32:40,888 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=93, PETRI_TRANSITIONS=72} [2020-10-16 02:32:40,888 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 21 predicate places. [2020-10-16 02:32:40,888 INFO L481 AbstractCegarLoop]: Abstraction has has 93 places, 72 transitions, 425 flow [2020-10-16 02:32:40,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 02:32:40,888 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:40,889 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:41,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-10-16 02:32:41,089 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:41,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:41,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2031979255, now seen corresponding path program 1 times [2020-10-16 02:32:41,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:41,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430031804] [2020-10-16 02:32:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-16 02:32:41,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430031804] [2020-10-16 02:32:41,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930003731] [2020-10-16 02:32:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:41,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:32:41,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-16 02:32:41,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:41,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-16 02:32:41,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374852227] [2020-10-16 02:32:41,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 02:32:41,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:41,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 02:32:41,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-10-16 02:32:41,307 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:41,308 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 72 transitions, 425 flow. Second operand 9 states. [2020-10-16 02:32:41,308 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:41,308 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:41,308 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:42,987 INFO L129 PetriNetUnfolder]: 5790/15797 cut-off events. [2020-10-16 02:32:42,987 INFO L130 PetriNetUnfolder]: For 21329/21329 co-relation queries the response was YES. [2020-10-16 02:32:43,126 INFO L80 FinitePrefix]: Finished finitePrefix Result has 50568 conditions, 15797 events. 5790/15797 cut-off events. For 21329/21329 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 157387 event pairs, 3980 based on Foata normal form. 155/14984 useless extension candidates. Maximal degree in co-relation 25513. Up to 6215 conditions per place. [2020-10-16 02:32:43,185 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 15 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2020-10-16 02:32:43,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 80 transitions, 521 flow [2020-10-16 02:32:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:32:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:32:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 854 transitions. [2020-10-16 02:32:43,187 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2020-10-16 02:32:43,187 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 854 transitions. [2020-10-16 02:32:43,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 854 transitions. [2020-10-16 02:32:43,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:43,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 854 transitions. [2020-10-16 02:32:43,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:32:43,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:32:43,190 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:32:43,190 INFO L185 Difference]: Start difference. First operand has 93 places, 72 transitions, 425 flow. Second operand 6 states and 854 transitions. [2020-10-16 02:32:43,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 80 transitions, 521 flow [2020-10-16 02:32:43,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 80 transitions, 497 flow, removed 4 selfloop flow, removed 5 redundant places. [2020-10-16 02:32:43,250 INFO L241 Difference]: Finished difference. Result has 94 places, 74 transitions, 452 flow [2020-10-16 02:32:43,250 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=94, PETRI_TRANSITIONS=74} [2020-10-16 02:32:43,250 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 22 predicate places. [2020-10-16 02:32:43,251 INFO L481 AbstractCegarLoop]: Abstraction has has 94 places, 74 transitions, 452 flow [2020-10-16 02:32:43,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 02:32:43,251 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:43,251 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:43,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:43,465 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:43,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:43,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1529297233, now seen corresponding path program 1 times [2020-10-16 02:32:43,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:43,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865965818] [2020-10-16 02:32:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 163 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:32:43,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865965818] [2020-10-16 02:32:43,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000619792] [2020-10-16 02:32:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:43,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:43,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 02:32:43,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 02:32:44,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 02:32:44,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 23 [2020-10-16 02:32:44,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650335624] [2020-10-16 02:32:44,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 02:32:44,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:44,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 02:32:44,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2020-10-16 02:32:44,004 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:44,005 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 74 transitions, 452 flow. Second operand 13 states. [2020-10-16 02:32:44,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:44,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:44,006 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:50,754 INFO L129 PetriNetUnfolder]: 8000/34514 cut-off events. [2020-10-16 02:32:50,755 INFO L130 PetriNetUnfolder]: For 41105/41105 co-relation queries the response was YES. [2020-10-16 02:32:51,028 INFO L80 FinitePrefix]: Finished finitePrefix Result has 136378 conditions, 34514 events. 8000/34514 cut-off events. For 41105/41105 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 475498 event pairs, 7158 based on Foata normal form. 2/27740 useless extension candidates. Maximal degree in co-relation 71197. Up to 18423 conditions per place. [2020-10-16 02:32:51,132 INFO L132 encePairwiseOnDemand]: 195/203 looper letters, 28 selfloop transitions, 45 changer transitions 0/125 dead transitions. [2020-10-16 02:32:51,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 125 transitions, 961 flow [2020-10-16 02:32:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 02:32:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 02:32:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1870 transitions. [2020-10-16 02:32:51,135 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7086017430845017 [2020-10-16 02:32:51,135 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1870 transitions. [2020-10-16 02:32:51,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1870 transitions. [2020-10-16 02:32:51,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:51,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1870 transitions. [2020-10-16 02:32:51,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 02:32:51,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 02:32:51,141 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 02:32:51,141 INFO L185 Difference]: Start difference. First operand has 94 places, 74 transitions, 452 flow. Second operand 13 states and 1870 transitions. [2020-10-16 02:32:51,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 125 transitions, 961 flow [2020-10-16 02:32:51,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 125 transitions, 893 flow, removed 10 selfloop flow, removed 7 redundant places. [2020-10-16 02:32:51,199 INFO L241 Difference]: Finished difference. Result has 99 places, 101 transitions, 709 flow [2020-10-16 02:32:51,199 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=709, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2020-10-16 02:32:51,200 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 27 predicate places. [2020-10-16 02:32:51,200 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 709 flow [2020-10-16 02:32:51,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 02:32:51,200 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:51,200 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:51,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-16 02:32:51,409 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash 982291090, now seen corresponding path program 1 times [2020-10-16 02:32:51,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:51,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196292620] [2020-10-16 02:32:51,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-16 02:32:51,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196292620] [2020-10-16 02:32:51,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243973472] [2020-10-16 02:32:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:51,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:32:51,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-16 02:32:51,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:51,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-16 02:32:51,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195666363] [2020-10-16 02:32:51,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 02:32:51,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:51,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 02:32:51,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-10-16 02:32:51,638 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:51,639 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 709 flow. Second operand 11 states. [2020-10-16 02:32:51,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:51,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:51,639 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:32:56,063 INFO L129 PetriNetUnfolder]: 7795/31181 cut-off events. [2020-10-16 02:32:56,064 INFO L130 PetriNetUnfolder]: For 48064/48064 co-relation queries the response was YES. [2020-10-16 02:32:56,316 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127675 conditions, 31181 events. 7795/31181 cut-off events. For 48064/48064 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 416479 event pairs, 7158 based on Foata normal form. 1173/32354 useless extension candidates. Maximal degree in co-relation 69147. Up to 14854 conditions per place. [2020-10-16 02:32:56,414 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 30 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2020-10-16 02:32:56,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 108 transitions, 858 flow [2020-10-16 02:32:56,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 02:32:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 02:32:56,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 997 transitions. [2020-10-16 02:32:56,416 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7016185784658691 [2020-10-16 02:32:56,416 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 997 transitions. [2020-10-16 02:32:56,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 997 transitions. [2020-10-16 02:32:56,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:32:56,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 997 transitions. [2020-10-16 02:32:56,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 02:32:56,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 02:32:56,419 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 02:32:56,419 INFO L185 Difference]: Start difference. First operand has 99 places, 101 transitions, 709 flow. Second operand 7 states and 997 transitions. [2020-10-16 02:32:56,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 108 transitions, 858 flow [2020-10-16 02:32:56,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 108 transitions, 772 flow, removed 18 selfloop flow, removed 7 redundant places. [2020-10-16 02:32:56,562 INFO L241 Difference]: Finished difference. Result has 99 places, 100 transitions, 676 flow [2020-10-16 02:32:56,562 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=676, PETRI_PLACES=99, PETRI_TRANSITIONS=100} [2020-10-16 02:32:56,562 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 27 predicate places. [2020-10-16 02:32:56,562 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 100 transitions, 676 flow [2020-10-16 02:32:56,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 02:32:56,562 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:32:56,563 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:32:56,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:56,763 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:32:56,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:32:56,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1039046273, now seen corresponding path program 1 times [2020-10-16 02:32:56,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:32:56,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125490868] [2020-10-16 02:32:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:32:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-16 02:32:56,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125490868] [2020-10-16 02:32:56,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644740382] [2020-10-16 02:32:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:32:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:32:56,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 02:32:56,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:32:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-16 02:32:57,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:32:57,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-10-16 02:32:57,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124635429] [2020-10-16 02:32:57,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 02:32:57,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:32:57,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 02:32:57,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-16 02:32:57,028 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 02:32:57,029 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 100 transitions, 676 flow. Second operand 13 states. [2020-10-16 02:32:57,029 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:32:57,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 02:32:57,029 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:33:00,486 INFO L129 PetriNetUnfolder]: 7544/26512 cut-off events. [2020-10-16 02:33:00,486 INFO L130 PetriNetUnfolder]: For 46723/46723 co-relation queries the response was YES. [2020-10-16 02:33:00,690 INFO L80 FinitePrefix]: Finished finitePrefix Result has 106037 conditions, 26512 events. 7544/26512 cut-off events. For 46723/46723 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 328770 event pairs, 7158 based on Foata normal form. 1099/27611 useless extension candidates. Maximal degree in co-relation 45658. Up to 9645 conditions per place. [2020-10-16 02:33:00,774 INFO L132 encePairwiseOnDemand]: 194/203 looper letters, 16 selfloop transitions, 40 changer transitions 0/108 dead transitions. [2020-10-16 02:33:00,774 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 832 flow [2020-10-16 02:33:00,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 02:33:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-16 02:33:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1278 transitions. [2020-10-16 02:33:00,776 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6995073891625616 [2020-10-16 02:33:00,776 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1278 transitions. [2020-10-16 02:33:00,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1278 transitions. [2020-10-16 02:33:00,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:33:00,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1278 transitions. [2020-10-16 02:33:00,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-16 02:33:00,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-16 02:33:00,779 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-16 02:33:00,779 INFO L185 Difference]: Start difference. First operand has 99 places, 100 transitions, 676 flow. Second operand 9 states and 1278 transitions. [2020-10-16 02:33:00,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 832 flow [2020-10-16 02:33:00,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 108 transitions, 770 flow, removed 6 selfloop flow, removed 6 redundant places. [2020-10-16 02:33:00,883 INFO L241 Difference]: Finished difference. Result has 103 places, 100 transitions, 731 flow [2020-10-16 02:33:00,884 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=731, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2020-10-16 02:33:00,884 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 31 predicate places. [2020-10-16 02:33:00,884 INFO L481 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 731 flow [2020-10-16 02:33:00,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 02:33:00,884 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:33:00,884 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:33:01,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 02:33:01,085 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 02:33:01,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:33:01,085 INFO L82 PathProgramCache]: Analyzing trace with hash -967832978, now seen corresponding path program 1 times [2020-10-16 02:33:01,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:33:01,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18817906] [2020-10-16 02:33:01,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:33:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:33:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-16 02:33:02,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18817906] [2020-10-16 02:33:02,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417059094] [2020-10-16 02:33:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:33:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:33:02,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-16 02:33:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:33:02,455 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-10-16 02:33:02,455 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 02:33:02,467 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 02:33:02,468 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 02:33:02,468 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-16 02:33:02,499 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2020-10-16 02:33:02,517 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 02:33:02,517 INFO L384 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 1 case distinctions, treesize of input 35 treesize of output 63 [2020-10-16 02:33:02,520 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 02:33:02,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 02:33:02,521 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-16 02:33:02,546 INFO L625 ElimStorePlain]: treesize reduction 33, result has 36.5 percent of original size [2020-10-16 02:33:02,546 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 02:33:02,554 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 02:33:02,555 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 02:33:02,555 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:36, output treesize:25 [2020-10-16 02:33:02,599 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 39 [2020-10-16 02:33:02,660 INFO L350 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2020-10-16 02:33:02,660 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 126 [2020-10-16 02:33:02,661 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 02:33:02,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 02:33:02,662 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 02:33:02,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 02:33:02,666 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-16 02:33:02,720 INFO L625 ElimStorePlain]: treesize reduction 92, result has 23.3 percent of original size [2020-10-16 02:33:02,722 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 02:33:02,735 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 02:33:02,735 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 02:33:02,736 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:52, output treesize:34 [2020-10-16 02:33:02,795 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 53 [2020-10-16 02:33:02,887 INFO L350 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2020-10-16 02:33:02,888 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 189 [2020-10-16 02:33:02,888 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 02:33:02,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 02:33:02,890 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 02:33:02,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 02:33:02,892 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 02:33:02,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 02:33:02,894 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-16 02:33:02,976 INFO L625 ElimStorePlain]: treesize reduction 133, result has 21.8 percent of original size [2020-10-16 02:33:02,976 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 02:33:02,989 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 02:33:02,989 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 02:33:02,990 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:68, output treesize:43 [2020-10-16 02:33:03,058 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 67 [2020-10-16 02:33:03,196 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-16 02:33:03,197 INFO L350 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2020-10-16 02:33:03,198 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 252 [2020-10-16 02:33:03,199 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 02:33:03,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 02:33:03,201 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 02:33:03,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 02:33:03,203 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 02:33:03,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 02:33:03,205 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 02:33:03,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 02:33:03,206 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-16 02:33:03,316 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2020-10-16 02:33:03,316 INFO L625 ElimStorePlain]: treesize reduction 194, result has 19.2 percent of original size [2020-10-16 02:33:03,317 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 02:33:03,333 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 02:33:03,334 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-16 02:33:03,335 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:84, output treesize:52 [2020-10-16 02:33:03,718 INFO L350 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2020-10-16 02:33:03,718 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 24 [2020-10-16 02:33:03,719 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 02:33:03,722 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 02:33:03,723 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 02:33:03,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:80, output treesize:3 [2020-10-16 02:33:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-16 02:33:03,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:33:03,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 26 [2020-10-16 02:33:03,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608135417] [2020-10-16 02:33:03,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 02:33:03,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:33:03,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 02:33:03,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2020-10-16 02:33:03,752 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 203 [2020-10-16 02:33:03,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 731 flow. Second operand 28 states. [2020-10-16 02:33:03,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:33:03,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 203 [2020-10-16 02:33:03,754 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:33:17,286 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47