/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 20:26:28,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 20:26:28,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 20:26:28,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 20:26:28,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 20:26:28,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 20:26:28,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 20:26:28,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 20:26:28,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 20:26:28,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 20:26:28,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 20:26:28,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 20:26:28,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 20:26:28,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 20:26:28,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 20:26:28,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 20:26:28,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 20:26:28,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 20:26:28,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 20:26:28,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 20:26:28,562 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 [2021-03-11 20:26:28,596 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 20:26:28,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 20:26:28,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 20:26:28,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 20:26:28,600 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 20:26:28,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 20:26:28,600 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 20:26:28,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 20:26:28,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 20:26:28,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 20:26:28,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 20:26:28,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 20:26:28,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 20:26:28,602 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 20:26:28,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 20:26:28,602 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 20:26:28,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 20:26:28,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 20:26:28,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 20:26:28,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 20:26:28,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 20:26:28,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 20:26:28,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 20:26:28,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 20:26:28,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 20:26:28,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 20:26:28,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 20:26:28,604 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 20:26:28,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 20:26:28,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 20:26:28,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 20:26:28,954 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 20:26:28,955 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 20:26:28,956 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 20:26:28,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.oepc.i [2021-03-11 20:26:29,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86dcd421f/edfbb14140ed4763b029a003131c29d0/FLAGe19f51055 [2021-03-11 20:26:29,671 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 20:26:29,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.oepc.i [2021-03-11 20:26:29,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86dcd421f/edfbb14140ed4763b029a003131c29d0/FLAGe19f51055 [2021-03-11 20:26:29,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86dcd421f/edfbb14140ed4763b029a003131c29d0 [2021-03-11 20:26:29,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 20:26:29,968 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 20:26:29,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 20:26:29,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 20:26:29,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 20:26:29,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:26:29" (1/1) ... [2021-03-11 20:26:29,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f10b343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:29, skipping insertion in model container [2021-03-11 20:26:29,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:26:29" (1/1) ... [2021-03-11 20:26:29,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 20:26:30,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 20:26:30,174 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.oepc.i[950,963] [2021-03-11 20:26:30,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:26:30,377 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 20:26:30,387 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.oepc.i[950,963] [2021-03-11 20:26:30,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:26:30,499 INFO L208 MainTranslator]: Completed translation [2021-03-11 20:26:30,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:30 WrapperNode [2021-03-11 20:26:30,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 20:26:30,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 20:26:30,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 20:26:30,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 20:26:30,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:30" (1/1) ... [2021-03-11 20:26:30,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:30" (1/1) ... [2021-03-11 20:26:30,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 20:26:30,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 20:26:30,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 20:26:30,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 20:26:30,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:30" (1/1) ... [2021-03-11 20:26:30,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:30" (1/1) ... [2021-03-11 20:26:30,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:30" (1/1) ... [2021-03-11 20:26:30,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:30" (1/1) ... [2021-03-11 20:26:30,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:30" (1/1) ... [2021-03-11 20:26:30,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:30" (1/1) ... [2021-03-11 20:26:30,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:30" (1/1) ... [2021-03-11 20:26:30,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 20:26:30,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 20:26:30,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 20:26:30,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 20:26:30,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:30" (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 [2021-03-11 20:26:30,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 20:26:30,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 20:26:30,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 20:26:30,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 20:26:30,675 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-11 20:26:30,676 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-11 20:26:30,676 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-11 20:26:30,676 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-11 20:26:30,677 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-03-11 20:26:30,677 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-03-11 20:26:30,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-11 20:26:30,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 20:26:30,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 20:26:30,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 20:26:30,679 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 20:26:31,041 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 20:26:31,041 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-11 20:26:31,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:26:31 BoogieIcfgContainer [2021-03-11 20:26:31,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 20:26:31,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 20:26:31,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 20:26:31,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 20:26:31,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 08:26:29" (1/3) ... [2021-03-11 20:26:31,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b021acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:26:31, skipping insertion in model container [2021-03-11 20:26:31,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:26:30" (2/3) ... [2021-03-11 20:26:31,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b021acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:26:31, skipping insertion in model container [2021-03-11 20:26:31,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:26:31" (3/3) ... [2021-03-11 20:26:31,049 INFO L111 eAbstractionObserver]: Analyzing ICFG safe021_tso.oepc.i [2021-03-11 20:26:31,054 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 20:26:31,058 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 20:26:31,059 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 20:26:31,081 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,081 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,081 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,082 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,082 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,082 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,082 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,082 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,083 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,083 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,083 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,083 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,083 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,083 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,084 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,084 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,084 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,084 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,084 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,084 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,085 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,085 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,085 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,085 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,085 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,085 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,086 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,086 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,086 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,086 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,086 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,086 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,087 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,087 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,087 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,087 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,089 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,089 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,089 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,089 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,096 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,096 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,097 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,097 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,103 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,103 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,103 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,104 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:26:31,109 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 20:26:31,129 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 20:26:31,148 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 20:26:31,149 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 20:26:31,149 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 20:26:31,149 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 20:26:31,149 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 20:26:31,150 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 20:26:31,150 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 20:26:31,150 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 20:26:31,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 75 transitions, 165 flow [2021-03-11 20:26:31,228 INFO L129 PetriNetUnfolder]: 2/72 cut-off events. [2021-03-11 20:26:31,229 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:26:31,232 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 72 events. 2/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2021-03-11 20:26:31,232 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 75 transitions, 165 flow [2021-03-11 20:26:31,239 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 60 transitions, 129 flow [2021-03-11 20:26:31,242 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 20:26:31,251 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 60 transitions, 129 flow [2021-03-11 20:26:31,255 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 60 transitions, 129 flow [2021-03-11 20:26:31,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 69 places, 60 transitions, 129 flow [2021-03-11 20:26:31,277 INFO L129 PetriNetUnfolder]: 1/60 cut-off events. [2021-03-11 20:26:31,278 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:26:31,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 60 events. 1/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2021-03-11 20:26:31,280 INFO L116 LiptonReduction]: Number of co-enabled transitions 864 [2021-03-11 20:26:33,345 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-03-11 20:26:33,563 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-03-11 20:26:33,631 INFO L131 LiptonReduction]: Checked pairs total: 1880 [2021-03-11 20:26:33,631 INFO L133 LiptonReduction]: Total number of compositions: 47 [2021-03-11 20:26:33,632 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2393 [2021-03-11 20:26:33,641 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 20:26:33,641 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:26:33,642 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:26:33,642 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:26:33,642 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:26:33,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:26:33,646 INFO L82 PathProgramCache]: Analyzing trace with hash 476692497, now seen corresponding path program 1 times [2021-03-11 20:26:33,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:26:33,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311493724] [2021-03-11 20:26:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:26:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:26:33,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:33,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:26:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:26:33,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311493724] [2021-03-11 20:26:33,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:26:33,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:26:33,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862686985] [2021-03-11 20:26:33,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-03-11 20:26:33,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:26:33,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-03-11 20:26:33,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-03-11 20:26:33,794 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 122 [2021-03-11 20:26:33,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 45 flow. Second operand has 2 states, 2 states have (on average 114.5) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:33,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:26:33,796 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 122 [2021-03-11 20:26:33,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:26:33,802 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 20:26:33,803 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:26:33,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-11 20:26:33,804 INFO L132 encePairwiseOnDemand]: 121/122 looper letters, 0 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2021-03-11 20:26:33,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 43 flow [2021-03-11 20:26:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-11 20:26:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-03-11 20:26:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 229 transitions. [2021-03-11 20:26:33,813 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9385245901639344 [2021-03-11 20:26:33,814 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 229 transitions. [2021-03-11 20:26:33,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 229 transitions. [2021-03-11 20:26:33,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:26:33,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 229 transitions. [2021-03-11 20:26:33,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 114.5) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:33,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:33,824 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:33,825 INFO L185 Difference]: Start difference. First operand has 27 places, 18 transitions, 45 flow. Second operand 2 states and 229 transitions. [2021-03-11 20:26:33,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 43 flow [2021-03-11 20:26:33,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 40 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-11 20:26:33,828 INFO L241 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2021-03-11 20:26:33,830 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2021-03-11 20:26:33,830 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2021-03-11 20:26:33,830 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2021-03-11 20:26:33,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 114.5) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:33,831 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:26:33,831 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:26:33,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 20:26:33,831 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:26:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:26:33,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1892564564, now seen corresponding path program 1 times [2021-03-11 20:26:33,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:26:33,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895723917] [2021-03-11 20:26:33,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:26:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:26:33,966 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-11 20:26:33,967 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 20:26:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:26:33,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895723917] [2021-03-11 20:26:33,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:26:33,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:26:33,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402771717] [2021-03-11 20:26:33,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:26:33,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:26:33,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:26:33,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:26:33,979 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 122 [2021-03-11 20:26:33,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:33,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:26:33,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 122 [2021-03-11 20:26:33,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:26:34,010 INFO L129 PetriNetUnfolder]: 24/86 cut-off events. [2021-03-11 20:26:34,010 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:26:34,011 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 86 events. 24/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 336 event pairs, 6 based on Foata normal form. 5/88 useless extension candidates. Maximal degree in co-relation 148. Up to 45 conditions per place. [2021-03-11 20:26:34,013 INFO L132 encePairwiseOnDemand]: 116/122 looper letters, 5 selfloop transitions, 5 changer transitions 0/21 dead transitions. [2021-03-11 20:26:34,013 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 68 flow [2021-03-11 20:26:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:26:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:26:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2021-03-11 20:26:34,018 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7923497267759563 [2021-03-11 20:26:34,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2021-03-11 20:26:34,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2021-03-11 20:26:34,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:26:34,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2021-03-11 20:26:34,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,024 INFO L185 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 290 transitions. [2021-03-11 20:26:34,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 68 flow [2021-03-11 20:26:34,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 21 transitions, 68 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:26:34,025 INFO L241 Difference]: Finished difference. Result has 29 places, 21 transitions, 78 flow [2021-03-11 20:26:34,026 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2021-03-11 20:26:34,026 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2021-03-11 20:26:34,026 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 78 flow [2021-03-11 20:26:34,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,026 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:26:34,026 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:26:34,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 20:26:34,027 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:26:34,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:26:34,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1477477906, now seen corresponding path program 1 times [2021-03-11 20:26:34,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:26:34,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189821831] [2021-03-11 20:26:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:26:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:26:34,105 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:34,106 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:34,111 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-11 20:26:34,111 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 20:26:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:26:34,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189821831] [2021-03-11 20:26:34,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:26:34,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:26:34,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749212991] [2021-03-11 20:26:34,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:26:34,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:26:34,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:26:34,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:26:34,123 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 122 [2021-03-11 20:26:34,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:26:34,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 122 [2021-03-11 20:26:34,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:26:34,164 INFO L129 PetriNetUnfolder]: 21/75 cut-off events. [2021-03-11 20:26:34,165 INFO L130 PetriNetUnfolder]: For 24/47 co-relation queries the response was YES. [2021-03-11 20:26:34,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 75 events. 21/75 cut-off events. For 24/47 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 261 event pairs, 4 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 204. Up to 40 conditions per place. [2021-03-11 20:26:34,166 INFO L132 encePairwiseOnDemand]: 116/122 looper letters, 6 selfloop transitions, 6 changer transitions 0/23 dead transitions. [2021-03-11 20:26:34,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 23 transitions, 114 flow [2021-03-11 20:26:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:26:34,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:26:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 383 transitions. [2021-03-11 20:26:34,168 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7848360655737705 [2021-03-11 20:26:34,168 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 383 transitions. [2021-03-11 20:26:34,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 383 transitions. [2021-03-11 20:26:34,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:26:34,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 383 transitions. [2021-03-11 20:26:34,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,172 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,172 INFO L185 Difference]: Start difference. First operand has 29 places, 21 transitions, 78 flow. Second operand 4 states and 383 transitions. [2021-03-11 20:26:34,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 23 transitions, 114 flow [2021-03-11 20:26:34,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 23 transitions, 100 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:26:34,174 INFO L241 Difference]: Finished difference. Result has 33 places, 23 transitions, 106 flow [2021-03-11 20:26:34,174 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2021-03-11 20:26:34,174 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2021-03-11 20:26:34,174 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 106 flow [2021-03-11 20:26:34,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,178 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:26:34,178 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:26:34,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 20:26:34,182 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:26:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:26:34,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1460030951, now seen corresponding path program 1 times [2021-03-11 20:26:34,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:26:34,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007279421] [2021-03-11 20:26:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:26:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:26:34,236 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:34,236 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:34,242 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-11 20:26:34,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 20:26:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:26:34,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007279421] [2021-03-11 20:26:34,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:26:34,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:26:34,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847231309] [2021-03-11 20:26:34,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:26:34,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:26:34,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:26:34,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:26:34,253 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 122 [2021-03-11 20:26:34,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:26:34,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 122 [2021-03-11 20:26:34,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:26:34,282 INFO L129 PetriNetUnfolder]: 15/63 cut-off events. [2021-03-11 20:26:34,282 INFO L130 PetriNetUnfolder]: For 53/78 co-relation queries the response was YES. [2021-03-11 20:26:34,283 INFO L84 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 63 events. 15/63 cut-off events. For 53/78 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 206 event pairs, 3 based on Foata normal form. 7/70 useless extension candidates. Maximal degree in co-relation 192. Up to 32 conditions per place. [2021-03-11 20:26:34,283 INFO L132 encePairwiseOnDemand]: 116/122 looper letters, 6 selfloop transitions, 11 changer transitions 0/28 dead transitions. [2021-03-11 20:26:34,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 28 transitions, 170 flow [2021-03-11 20:26:34,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:26:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:26:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 386 transitions. [2021-03-11 20:26:34,286 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7909836065573771 [2021-03-11 20:26:34,286 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 386 transitions. [2021-03-11 20:26:34,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 386 transitions. [2021-03-11 20:26:34,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:26:34,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 386 transitions. [2021-03-11 20:26:34,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,292 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,292 INFO L185 Difference]: Start difference. First operand has 33 places, 23 transitions, 106 flow. Second operand 4 states and 386 transitions. [2021-03-11 20:26:34,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 28 transitions, 170 flow [2021-03-11 20:26:34,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 28 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:26:34,297 INFO L241 Difference]: Finished difference. Result has 37 places, 27 transitions, 169 flow [2021-03-11 20:26:34,297 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2021-03-11 20:26:34,298 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2021-03-11 20:26:34,298 INFO L480 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 169 flow [2021-03-11 20:26:34,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,298 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:26:34,298 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:26:34,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 20:26:34,299 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:26:34,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:26:34,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1983541529, now seen corresponding path program 1 times [2021-03-11 20:26:34,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:26:34,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595275216] [2021-03-11 20:26:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:26:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:26:34,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:34,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:34,362 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-11 20:26:34,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 20:26:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:26:34,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595275216] [2021-03-11 20:26:34,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:26:34,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:26:34,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827063577] [2021-03-11 20:26:34,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:26:34,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:26:34,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:26:34,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:26:34,376 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 122 [2021-03-11 20:26:34,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:26:34,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 122 [2021-03-11 20:26:34,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:26:34,425 INFO L129 PetriNetUnfolder]: 35/110 cut-off events. [2021-03-11 20:26:34,426 INFO L130 PetriNetUnfolder]: For 236/282 co-relation queries the response was YES. [2021-03-11 20:26:34,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 110 events. 35/110 cut-off events. For 236/282 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 442 event pairs, 0 based on Foata normal form. 13/123 useless extension candidates. Maximal degree in co-relation 383. Up to 46 conditions per place. [2021-03-11 20:26:34,429 INFO L132 encePairwiseOnDemand]: 115/122 looper letters, 13 selfloop transitions, 19 changer transitions 0/42 dead transitions. [2021-03-11 20:26:34,429 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 42 transitions, 350 flow [2021-03-11 20:26:34,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:26:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:26:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 476 transitions. [2021-03-11 20:26:34,431 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.780327868852459 [2021-03-11 20:26:34,431 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 476 transitions. [2021-03-11 20:26:34,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 476 transitions. [2021-03-11 20:26:34,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:26:34,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 476 transitions. [2021-03-11 20:26:34,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.2) internal successors, (476), 5 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,434 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,434 INFO L185 Difference]: Start difference. First operand has 37 places, 27 transitions, 169 flow. Second operand 5 states and 476 transitions. [2021-03-11 20:26:34,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 42 transitions, 350 flow [2021-03-11 20:26:34,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 348 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-03-11 20:26:34,440 INFO L241 Difference]: Finished difference. Result has 45 places, 39 transitions, 359 flow [2021-03-11 20:26:34,440 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=359, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2021-03-11 20:26:34,443 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2021-03-11 20:26:34,443 INFO L480 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 359 flow [2021-03-11 20:26:34,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,444 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:26:34,444 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:26:34,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 20:26:34,444 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:26:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:26:34,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1983685679, now seen corresponding path program 2 times [2021-03-11 20:26:34,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:26:34,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584338145] [2021-03-11 20:26:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:26:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:26:34,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:34,488 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:34,490 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:34,491 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:34,496 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-11 20:26:34,498 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 20:26:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:26:34,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584338145] [2021-03-11 20:26:34,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:26:34,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:26:34,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069460965] [2021-03-11 20:26:34,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:26:34,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:26:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:26:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:26:34,510 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 122 [2021-03-11 20:26:34,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 359 flow. Second operand has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:26:34,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 122 [2021-03-11 20:26:34,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:26:34,553 INFO L129 PetriNetUnfolder]: 24/100 cut-off events. [2021-03-11 20:26:34,553 INFO L130 PetriNetUnfolder]: For 478/533 co-relation queries the response was YES. [2021-03-11 20:26:34,554 INFO L84 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 100 events. 24/100 cut-off events. For 478/533 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 445 event pairs, 2 based on Foata normal form. 15/115 useless extension candidates. Maximal degree in co-relation 464. Up to 40 conditions per place. [2021-03-11 20:26:34,554 INFO L132 encePairwiseOnDemand]: 116/122 looper letters, 7 selfloop transitions, 7 changer transitions 20/44 dead transitions. [2021-03-11 20:26:34,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 488 flow [2021-03-11 20:26:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:26:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:26:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 470 transitions. [2021-03-11 20:26:34,556 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7704918032786885 [2021-03-11 20:26:34,556 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 470 transitions. [2021-03-11 20:26:34,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 470 transitions. [2021-03-11 20:26:34,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:26:34,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 470 transitions. [2021-03-11 20:26:34,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,560 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,560 INFO L185 Difference]: Start difference. First operand has 45 places, 39 transitions, 359 flow. Second operand 5 states and 470 transitions. [2021-03-11 20:26:34,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 488 flow [2021-03-11 20:26:34,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 44 transitions, 488 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:26:34,565 INFO L241 Difference]: Finished difference. Result has 51 places, 24 transitions, 208 flow [2021-03-11 20:26:34,565 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=51, PETRI_TRANSITIONS=24} [2021-03-11 20:26:34,565 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2021-03-11 20:26:34,565 INFO L480 AbstractCegarLoop]: Abstraction has has 51 places, 24 transitions, 208 flow [2021-03-11 20:26:34,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,565 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:26:34,565 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:26:34,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 20:26:34,566 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:26:34,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:26:34,566 INFO L82 PathProgramCache]: Analyzing trace with hash 378487863, now seen corresponding path program 1 times [2021-03-11 20:26:34,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:26:34,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821575931] [2021-03-11 20:26:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:26:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:26:34,616 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:26:34,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:26:34,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:34,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:26:34,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821575931] [2021-03-11 20:26:34,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:26:34,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:26:34,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897644013] [2021-03-11 20:26:34,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:26:34,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:26:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:26:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:26:34,628 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 122 [2021-03-11 20:26:34,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 24 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:26:34,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 122 [2021-03-11 20:26:34,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:26:34,675 INFO L129 PetriNetUnfolder]: 68/167 cut-off events. [2021-03-11 20:26:34,675 INFO L130 PetriNetUnfolder]: For 948/1011 co-relation queries the response was YES. [2021-03-11 20:26:34,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 167 events. 68/167 cut-off events. For 948/1011 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 803 event pairs, 13 based on Foata normal form. 17/165 useless extension candidates. Maximal degree in co-relation 540. Up to 74 conditions per place. [2021-03-11 20:26:34,680 INFO L132 encePairwiseOnDemand]: 116/122 looper letters, 8 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2021-03-11 20:26:34,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 31 transitions, 248 flow [2021-03-11 20:26:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:26:34,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:26:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2021-03-11 20:26:34,682 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7766393442622951 [2021-03-11 20:26:34,682 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2021-03-11 20:26:34,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2021-03-11 20:26:34,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:26:34,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2021-03-11 20:26:34,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,685 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,685 INFO L185 Difference]: Start difference. First operand has 51 places, 24 transitions, 208 flow. Second operand 4 states and 379 transitions. [2021-03-11 20:26:34,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 31 transitions, 248 flow [2021-03-11 20:26:34,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 161 flow, removed 11 selfloop flow, removed 14 redundant places. [2021-03-11 20:26:34,688 INFO L241 Difference]: Finished difference. Result has 42 places, 28 transitions, 159 flow [2021-03-11 20:26:34,689 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2021-03-11 20:26:34,689 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 15 predicate places. [2021-03-11 20:26:34,689 INFO L480 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 159 flow [2021-03-11 20:26:34,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,689 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:26:34,689 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:26:34,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 20:26:34,690 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:26:34,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:26:34,690 INFO L82 PathProgramCache]: Analyzing trace with hash -814071070, now seen corresponding path program 1 times [2021-03-11 20:26:34,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:26:34,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596780830] [2021-03-11 20:26:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:26:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:26:34,748 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:34,751 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:34,754 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:26:34,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:26:34,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:34,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:26:34,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596780830] [2021-03-11 20:26:34,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:26:34,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:26:34,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857191213] [2021-03-11 20:26:34,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:26:34,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:26:34,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:26:34,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:26:34,763 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 122 [2021-03-11 20:26:34,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 28 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:26:34,764 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 122 [2021-03-11 20:26:34,764 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:26:34,833 INFO L129 PetriNetUnfolder]: 49/145 cut-off events. [2021-03-11 20:26:34,834 INFO L130 PetriNetUnfolder]: For 240/526 co-relation queries the response was YES. [2021-03-11 20:26:34,834 INFO L84 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 145 events. 49/145 cut-off events. For 240/526 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 736 event pairs, 1 based on Foata normal form. 34/159 useless extension candidates. Maximal degree in co-relation 495. Up to 101 conditions per place. [2021-03-11 20:26:34,835 INFO L132 encePairwiseOnDemand]: 116/122 looper letters, 9 selfloop transitions, 8 changer transitions 0/35 dead transitions. [2021-03-11 20:26:34,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 35 transitions, 222 flow [2021-03-11 20:26:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:26:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:26:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 474 transitions. [2021-03-11 20:26:34,837 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7770491803278688 [2021-03-11 20:26:34,837 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 474 transitions. [2021-03-11 20:26:34,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 474 transitions. [2021-03-11 20:26:34,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:26:34,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 474 transitions. [2021-03-11 20:26:34,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,839 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,840 INFO L185 Difference]: Start difference. First operand has 42 places, 28 transitions, 159 flow. Second operand 5 states and 474 transitions. [2021-03-11 20:26:34,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 35 transitions, 222 flow [2021-03-11 20:26:34,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 35 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:26:34,841 INFO L241 Difference]: Finished difference. Result has 47 places, 32 transitions, 211 flow [2021-03-11 20:26:34,842 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2021-03-11 20:26:34,842 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2021-03-11 20:26:34,842 INFO L480 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 211 flow [2021-03-11 20:26:34,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 91.8) internal successors, (459), 5 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,842 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:26:34,842 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:26:34,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 20:26:34,843 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:26:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:26:34,843 INFO L82 PathProgramCache]: Analyzing trace with hash 743375258, now seen corresponding path program 1 times [2021-03-11 20:26:34,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:26:34,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109225799] [2021-03-11 20:26:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:26:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:26:34,878 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:34,878 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:34,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:34,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:34,887 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:26:34,888 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:26:34,892 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:34,893 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:26:34,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109225799] [2021-03-11 20:26:34,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:26:34,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 20:26:34,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747124815] [2021-03-11 20:26:34,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 20:26:34,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:26:34,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 20:26:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 20:26:34,899 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 122 [2021-03-11 20:26:34,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 211 flow. Second operand has 6 states, 6 states have (on average 91.83333333333333) internal successors, (551), 6 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:26:34,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 122 [2021-03-11 20:26:34,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:26:34,966 INFO L129 PetriNetUnfolder]: 43/134 cut-off events. [2021-03-11 20:26:34,966 INFO L130 PetriNetUnfolder]: For 488/926 co-relation queries the response was YES. [2021-03-11 20:26:34,967 INFO L84 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 134 events. 43/134 cut-off events. For 488/926 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 669 event pairs, 0 based on Foata normal form. 43/158 useless extension candidates. Maximal degree in co-relation 597. Up to 92 conditions per place. [2021-03-11 20:26:34,968 INFO L132 encePairwiseOnDemand]: 116/122 looper letters, 4 selfloop transitions, 11 changer transitions 0/33 dead transitions. [2021-03-11 20:26:34,968 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 33 transitions, 248 flow [2021-03-11 20:26:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 20:26:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 20:26:34,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 563 transitions. [2021-03-11 20:26:34,970 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7691256830601093 [2021-03-11 20:26:34,970 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 563 transitions. [2021-03-11 20:26:34,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 563 transitions. [2021-03-11 20:26:34,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:26:34,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 563 transitions. [2021-03-11 20:26:34,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 93.83333333333333) internal successors, (563), 6 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,975 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 122.0) internal successors, (854), 7 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,975 INFO L185 Difference]: Start difference. First operand has 47 places, 32 transitions, 211 flow. Second operand 6 states and 563 transitions. [2021-03-11 20:26:34,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 33 transitions, 248 flow [2021-03-11 20:26:34,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 33 transitions, 235 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-11 20:26:34,977 INFO L241 Difference]: Finished difference. Result has 52 places, 33 transitions, 243 flow [2021-03-11 20:26:34,977 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=52, PETRI_TRANSITIONS=33} [2021-03-11 20:26:34,978 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2021-03-11 20:26:34,978 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 33 transitions, 243 flow [2021-03-11 20:26:34,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 91.83333333333333) internal successors, (551), 6 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:34,978 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:26:34,978 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:26:34,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 20:26:34,978 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:26:34,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:26:34,979 INFO L82 PathProgramCache]: Analyzing trace with hash -221637148, now seen corresponding path program 1 times [2021-03-11 20:26:34,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:26:34,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508241463] [2021-03-11 20:26:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:26:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:26:35,038 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:35,039 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:26:35,039 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:35,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:35,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:26:35,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:26:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:26:35,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508241463] [2021-03-11 20:26:35,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:26:35,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:26:35,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662463499] [2021-03-11 20:26:35,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:26:35,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:26:35,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:26:35,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:26:35,048 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 122 [2021-03-11 20:26:35,049 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 33 transitions, 243 flow. Second operand has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:35,049 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:26:35,049 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 122 [2021-03-11 20:26:35,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:26:35,083 INFO L129 PetriNetUnfolder]: 60/176 cut-off events. [2021-03-11 20:26:35,083 INFO L130 PetriNetUnfolder]: For 752/868 co-relation queries the response was YES. [2021-03-11 20:26:35,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 176 events. 60/176 cut-off events. For 752/868 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 994 event pairs, 0 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 736. Up to 103 conditions per place. [2021-03-11 20:26:35,084 INFO L132 encePairwiseOnDemand]: 119/122 looper letters, 0 selfloop transitions, 0 changer transitions 33/33 dead transitions. [2021-03-11 20:26:35,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 33 transitions, 239 flow [2021-03-11 20:26:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:26:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:26:35,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 397 transitions. [2021-03-11 20:26:35,085 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8135245901639344 [2021-03-11 20:26:35,085 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 397 transitions. [2021-03-11 20:26:35,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 397 transitions. [2021-03-11 20:26:35,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:26:35,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 397 transitions. [2021-03-11 20:26:35,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.25) internal successors, (397), 4 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:35,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:35,088 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:35,088 INFO L185 Difference]: Start difference. First operand has 52 places, 33 transitions, 243 flow. Second operand 4 states and 397 transitions. [2021-03-11 20:26:35,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 33 transitions, 239 flow [2021-03-11 20:26:35,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 33 transitions, 196 flow, removed 6 selfloop flow, removed 7 redundant places. [2021-03-11 20:26:35,090 INFO L241 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2021-03-11 20:26:35,091 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2021-03-11 20:26:35,091 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 20 predicate places. [2021-03-11 20:26:35,091 INFO L480 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2021-03-11 20:26:35,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:26:35,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 20:26:35,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 08:26:35 BasicIcfg [2021-03-11 20:26:35,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 20:26:35,096 INFO L168 Benchmark]: Toolchain (without parser) took 5131.01 ms. Allocated memory was 255.9 MB in the beginning and 432.0 MB in the end (delta: 176.2 MB). Free memory was 235.5 MB in the beginning and 355.9 MB in the end (delta: -120.4 MB). Peak memory consumption was 56.8 MB. Max. memory is 16.0 GB. [2021-03-11 20:26:35,096 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 20:26:35,099 INFO L168 Benchmark]: CACSL2BoogieTranslator took 528.83 ms. Allocated memory was 255.9 MB in the beginning and 358.6 MB in the end (delta: 102.8 MB). Free memory was 234.9 MB in the beginning and 321.6 MB in the end (delta: -86.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-11 20:26:35,100 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.28 ms. Allocated memory is still 358.6 MB. Free memory was 321.6 MB in the beginning and 319.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:26:35,100 INFO L168 Benchmark]: Boogie Preprocessor took 31.81 ms. Allocated memory is still 358.6 MB. Free memory was 319.5 MB in the beginning and 318.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:26:35,103 INFO L168 Benchmark]: RCFGBuilder took 451.60 ms. Allocated memory is still 358.6 MB. Free memory was 318.2 MB in the beginning and 296.2 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-03-11 20:26:35,103 INFO L168 Benchmark]: TraceAbstraction took 4051.02 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 296.2 MB in the beginning and 355.9 MB in the end (delta: -59.7 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.0 GB. [2021-03-11 20:26:35,111 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 528.83 ms. Allocated memory was 255.9 MB in the beginning and 358.6 MB in the end (delta: 102.8 MB). Free memory was 234.9 MB in the beginning and 321.6 MB in the end (delta: -86.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 57.28 ms. Allocated memory is still 358.6 MB. Free memory was 321.6 MB in the beginning and 319.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 31.81 ms. Allocated memory is still 358.6 MB. Free memory was 319.5 MB in the beginning and 318.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 451.60 ms. Allocated memory is still 358.6 MB. Free memory was 318.2 MB in the beginning and 296.2 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4051.02 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 296.2 MB in the beginning and 355.9 MB in the end (delta: -59.7 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2376.5ms, 69 PlacesBefore, 27 PlacesAfterwards, 60 TransitionsBefore, 18 TransitionsAfterwards, 864 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 0 ChoiceCompositions, 47 TotalNumberOfCompositions, 1880 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1080, positive: 996, positive conditional: 0, positive unconditional: 996, negative: 84, negative conditional: 0, negative unconditional: 84, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 612, positive: 578, positive conditional: 0, positive unconditional: 578, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 612, positive: 572, positive conditional: 0, positive unconditional: 572, negative: 40, negative conditional: 0, negative unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 40, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 179, positive: 27, positive conditional: 0, positive unconditional: 27, negative: 153, negative conditional: 0, negative unconditional: 153, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1080, positive: 418, positive conditional: 0, positive unconditional: 418, negative: 50, negative conditional: 0, negative unconditional: 50, unknown: 612, unknown conditional: 0, unknown unconditional: 612] , Statistics on independence cache: Total cache size (in pairs): 72, Positive cache size: 61, Positive conditional cache size: 0, Positive unconditional cache size: 61, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 74 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3950.1ms, OverallIterations: 10, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 576.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2488.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 46 SDtfs, 27 SDslu, 33 SDs, 0 SdLazy, 92 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 121.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 127.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=359occurred in iteration=5, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 27.0ms SsaConstructionTime, 146.0ms SatisfiabilityAnalysisTime, 535.7ms InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 448 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...