/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bf34d27 [2022-01-18 22:05:46,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 22:05:46,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 22:05:46,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 22:05:46,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 22:05:46,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 22:05:46,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 22:05:46,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 22:05:46,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 22:05:46,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 22:05:46,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 22:05:46,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 22:05:46,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 22:05:46,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 22:05:46,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 22:05:46,111 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 22:05:46,112 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 22:05:46,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 22:05:46,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 22:05:46,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 22:05:46,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 22:05:46,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 22:05:46,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 22:05:46,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 22:05:46,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-18 22:05:46,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-18 22:05:46,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-18 22:05:46,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-18 22:05:46,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-18 22:05:46,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-18 22:05:46,133 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-18 22:05:46,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-18 22:05:46,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-18 22:05:46,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-18 22:05:46,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-18 22:05:46,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-18 22:05:46,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-18 22:05:46,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-18 22:05:46,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 22:05:46,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 22:05:46,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 22:05:46,141 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-NoLbe.epf [2022-01-18 22:05:46,176 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 22:05:46,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 22:05:46,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 22:05:46,178 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 22:05:46,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 22:05:46,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 22:05:46,178 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 22:05:46,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 22:05:46,179 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 22:05:46,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 22:05:46,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 22:05:46,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 22:05:46,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 22:05:46,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 22:05:46,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 22:05:46,180 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 22:05:46,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 22:05:46,180 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 22:05:46,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 22:05:46,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 22:05:46,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 22:05:46,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 22:05:46,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 22:05:46,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 22:05:46,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 22:05:46,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 22:05:46,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 22:05:46,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 22:05:46,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 22:05:46,183 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 22:05:46,183 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-18 22:05:46,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 22:05:46,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 22:05:46,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 22:05:46,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 22:05:46,408 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-18 22:05:46,409 INFO L275 PluginConnector]: CDTParser initialized [2022-01-18 22:05:46,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2022-01-18 22:05:46,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b15a0d7/423436ce3404470bb913b67099de2b8b/FLAGdefbf8a8b [2022-01-18 22:05:46,939 INFO L306 CDTParser]: Found 1 translation units. [2022-01-18 22:05:46,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2022-01-18 22:05:46,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b15a0d7/423436ce3404470bb913b67099de2b8b/FLAGdefbf8a8b [2022-01-18 22:05:46,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08b15a0d7/423436ce3404470bb913b67099de2b8b [2022-01-18 22:05:46,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 22:05:46,976 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-18 22:05:46,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-18 22:05:46,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-18 22:05:46,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-18 22:05:46,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.01 10:05:46" (1/1) ... [2022-01-18 22:05:46,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65092314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:46, skipping insertion in model container [2022-01-18 22:05:46,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.01 10:05:46" (1/1) ... [2022-01-18 22:05:46,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-18 22:05:47,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-18 22:05:47,276 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2022-01-18 22:05:47,279 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-18 22:05:47,284 INFO L203 MainTranslator]: Completed pre-run [2022-01-18 22:05:47,314 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2022-01-18 22:05:47,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-18 22:05:47,347 INFO L208 MainTranslator]: Completed translation [2022-01-18 22:05:47,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:47 WrapperNode [2022-01-18 22:05:47,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-18 22:05:47,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 22:05:47,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 22:05:47,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 22:05:47,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:47" (1/1) ... [2022-01-18 22:05:47,381 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:47" (1/1) ... [2022-01-18 22:05:47,398 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-01-18 22:05:47,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 22:05:47,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 22:05:47,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 22:05:47,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 22:05:47,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:47" (1/1) ... [2022-01-18 22:05:47,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:47" (1/1) ... [2022-01-18 22:05:47,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:47" (1/1) ... [2022-01-18 22:05:47,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:47" (1/1) ... [2022-01-18 22:05:47,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:47" (1/1) ... [2022-01-18 22:05:47,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:47" (1/1) ... [2022-01-18 22:05:47,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:47" (1/1) ... [2022-01-18 22:05:47,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 22:05:47,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 22:05:47,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 22:05:47,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 22:05:47,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:47" (1/1) ... [2022-01-18 22:05:47,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 22:05:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:05:47,460 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 22:05:47,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 22:05:47,506 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-01-18 22:05:47,506 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-01-18 22:05:47,506 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-01-18 22:05:47,506 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-01-18 22:05:47,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-18 22:05:47,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-01-18 22:05:47,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-18 22:05:47,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-18 22:05:47,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-18 22:05:47,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-18 22:05:47,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-01-18 22:05:47,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 22:05:47,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 22:05:47,512 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 22:05:47,622 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 22:05:47,623 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 22:05:47,758 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 22:05:47,763 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 22:05:47,763 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-18 22:05:47,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 10:05:47 BoogieIcfgContainer [2022-01-18 22:05:47,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 22:05:47,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 22:05:47,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 22:05:47,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 22:05:47,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.01 10:05:46" (1/3) ... [2022-01-18 22:05:47,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f47682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 10:05:47, skipping insertion in model container [2022-01-18 22:05:47,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.01 10:05:47" (2/3) ... [2022-01-18 22:05:47,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f47682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 10:05:47, skipping insertion in model container [2022-01-18 22:05:47,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 10:05:47" (3/3) ... [2022-01-18 22:05:47,771 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2022-01-18 22:05:47,774 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 22:05:47,775 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 22:05:47,775 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 22:05:47,806 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,806 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,807 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,807 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,807 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,807 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,807 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,807 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,807 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,808 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,808 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,808 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,808 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,809 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,809 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,809 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,809 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,809 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,810 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,810 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,810 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,810 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,810 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,810 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,810 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,811 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,811 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,811 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,811 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,811 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,812 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,812 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,812 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,812 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,812 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,812 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,812 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,813 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,813 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,813 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,813 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,814 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,814 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,814 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,814 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,814 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,815 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,815 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,815 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,815 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,815 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,815 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,815 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,815 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,816 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,816 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,818 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,818 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,818 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,818 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,818 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,819 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,822 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,822 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,822 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,822 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,823 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,823 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 22:05:47,823 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 22:05:47,860 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 22:05:47,871 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 22:05:47,871 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 22:05:47,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-01-18 22:05:47,910 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2022-01-18 22:05:47,910 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-18 22:05:47,913 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-01-18 22:05:47,913 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-01-18 22:05:47,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-01-18 22:05:47,930 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2022-01-18 22:05:47,930 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-01-18 22:05:47,930 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:47,930 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:47,931 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:47,935 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-01-18 22:05:47,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:47,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629792674] [2022-01-18 22:05:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:47,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:48,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:05:48,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629792674] [2022-01-18 22:05:48,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629792674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:05:48,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:05:48,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 22:05:48,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492591031] [2022-01-18 22:05:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:05:48,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 22:05:48,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:05:48,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 22:05:48,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 22:05:48,267 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:05:48,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:05:48,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:05:48,271 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:05:48,423 INFO L129 PetriNetUnfolder]: 42/210 cut-off events. [2022-01-18 22:05:48,426 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-01-18 22:05:48,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 210 events. 42/210 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 816 event pairs, 3 based on Foata normal form. 46/240 useless extension candidates. Maximal degree in co-relation 257. Up to 28 conditions per place. [2022-01-18 22:05:48,432 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-01-18 22:05:48,432 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-01-18 22:05:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 22:05:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-01-18 22:05:48,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-01-18 22:05:48,447 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-01-18 22:05:48,448 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-01-18 22:05:48,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-01-18 22:05:48,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:05:48,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-01-18 22:05:48,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,464 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,465 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-01-18 22:05:48,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-01-18 22:05:48,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-01-18 22:05:48,471 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-01-18 22:05:48,473 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-01-18 22:05:48,475 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-01-18 22:05:48,475 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-01-18 22:05:48,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,476 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:48,476 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:48,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 22:05:48,477 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:48,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:48,477 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-01-18 22:05:48,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:48,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769039323] [2022-01-18 22:05:48,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:48,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:48,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:05:48,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769039323] [2022-01-18 22:05:48,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769039323] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:05:48,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:05:48,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 22:05:48,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812445544] [2022-01-18 22:05:48,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:05:48,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 22:05:48,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:05:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 22:05:48,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 22:05:48,592 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:05:48,592 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,592 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:05:48,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:05:48,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:05:48,709 INFO L129 PetriNetUnfolder]: 46/217 cut-off events. [2022-01-18 22:05:48,709 INFO L130 PetriNetUnfolder]: For 109/112 co-relation queries the response was YES. [2022-01-18 22:05:48,712 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 217 events. 46/217 cut-off events. For 109/112 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 853 event pairs, 0 based on Foata normal form. 3/204 useless extension candidates. Maximal degree in co-relation 376. Up to 35 conditions per place. [2022-01-18 22:05:48,713 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-01-18 22:05:48,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-01-18 22:05:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 22:05:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-01-18 22:05:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-01-18 22:05:48,715 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-01-18 22:05:48,715 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-01-18 22:05:48,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-01-18 22:05:48,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:05:48,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-01-18 22:05:48,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,720 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,720 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-01-18 22:05:48,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-01-18 22:05:48,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-01-18 22:05:48,727 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-01-18 22:05:48,727 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-01-18 22:05:48,728 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-01-18 22:05:48,728 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-01-18 22:05:48,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,728 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:48,729 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:48,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 22:05:48,729 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:48,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:48,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-01-18 22:05:48,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:48,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444974816] [2022-01-18 22:05:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:48,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:48,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:05:48,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444974816] [2022-01-18 22:05:48,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444974816] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:05:48,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:05:48,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 22:05:48,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078616025] [2022-01-18 22:05:48,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:05:48,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 22:05:48,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:05:48,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 22:05:48,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 22:05:48,887 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:05:48,888 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,888 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:05:48,888 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:05:48,888 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:05:48,981 INFO L129 PetriNetUnfolder]: 37/196 cut-off events. [2022-01-18 22:05:48,981 INFO L130 PetriNetUnfolder]: For 258/265 co-relation queries the response was YES. [2022-01-18 22:05:48,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 196 events. 37/196 cut-off events. For 258/265 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 651 event pairs, 0 based on Foata normal form. 10/188 useless extension candidates. Maximal degree in co-relation 362. Up to 35 conditions per place. [2022-01-18 22:05:48,983 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-01-18 22:05:48,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-01-18 22:05:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 22:05:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-18 22:05:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-01-18 22:05:48,986 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-01-18 22:05:48,986 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-01-18 22:05:48,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-01-18 22:05:48,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:05:48,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-01-18 22:05:48,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,998 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:48,998 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-01-18 22:05:48,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-01-18 22:05:49,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-01-18 22:05:49,006 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-01-18 22:05:49,006 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-01-18 22:05:49,008 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-01-18 22:05:49,008 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-01-18 22:05:49,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,009 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:49,009 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:49,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 22:05:49,009 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:49,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-01-18 22:05:49,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:49,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883078491] [2022-01-18 22:05:49,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:49,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:49,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:05:49,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883078491] [2022-01-18 22:05:49,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883078491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:05:49,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:05:49,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 22:05:49,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535913378] [2022-01-18 22:05:49,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:05:49,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 22:05:49,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:05:49,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 22:05:49,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-18 22:05:49,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:05:49,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:05:49,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:05:49,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:05:49,265 INFO L129 PetriNetUnfolder]: 30/185 cut-off events. [2022-01-18 22:05:49,265 INFO L130 PetriNetUnfolder]: For 246/265 co-relation queries the response was YES. [2022-01-18 22:05:49,266 INFO L84 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 185 events. 30/185 cut-off events. For 246/265 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 614 event pairs, 0 based on Foata normal form. 16/184 useless extension candidates. Maximal degree in co-relation 373. Up to 32 conditions per place. [2022-01-18 22:05:49,267 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2022-01-18 22:05:49,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2022-01-18 22:05:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 22:05:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-18 22:05:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2022-01-18 22:05:49,269 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-01-18 22:05:49,269 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2022-01-18 22:05:49,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2022-01-18 22:05:49,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:05:49,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2022-01-18 22:05:49,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,273 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,273 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2022-01-18 22:05:49,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2022-01-18 22:05:49,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-01-18 22:05:49,279 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2022-01-18 22:05:49,280 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2022-01-18 22:05:49,280 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2022-01-18 22:05:49,280 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2022-01-18 22:05:49,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,281 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:49,281 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:49,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 22:05:49,281 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:49,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash 704825237, now seen corresponding path program 1 times [2022-01-18 22:05:49,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:49,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158890573] [2022-01-18 22:05:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:49,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:49,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:05:49,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158890573] [2022-01-18 22:05:49,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158890573] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:05:49,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:05:49,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-18 22:05:49,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309174520] [2022-01-18 22:05:49,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:05:49,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 22:05:49,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:05:49,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 22:05:49,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-18 22:05:49,375 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:05:49,376 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,376 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:05:49,376 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:05:49,376 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:05:49,490 INFO L129 PetriNetUnfolder]: 43/227 cut-off events. [2022-01-18 22:05:49,491 INFO L130 PetriNetUnfolder]: For 607/629 co-relation queries the response was YES. [2022-01-18 22:05:49,492 INFO L84 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 227 events. 43/227 cut-off events. For 607/629 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 792 event pairs, 1 based on Foata normal form. 15/221 useless extension candidates. Maximal degree in co-relation 528. Up to 50 conditions per place. [2022-01-18 22:05:49,493 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 23 selfloop transitions, 21 changer transitions 8/97 dead transitions. [2022-01-18 22:05:49,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 660 flow [2022-01-18 22:05:49,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 22:05:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-18 22:05:49,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-01-18 22:05:49,496 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-01-18 22:05:49,496 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-01-18 22:05:49,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-01-18 22:05:49,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:05:49,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-01-18 22:05:49,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,500 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,500 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 644 transitions. [2022-01-18 22:05:49,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 660 flow [2022-01-18 22:05:49,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 544 flow, removed 45 selfloop flow, removed 10 redundant places. [2022-01-18 22:05:49,505 INFO L242 Difference]: Finished difference. Result has 97 places, 79 transitions, 417 flow [2022-01-18 22:05:49,506 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=417, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2022-01-18 22:05:49,508 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 27 predicate places. [2022-01-18 22:05:49,508 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 417 flow [2022-01-18 22:05:49,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,509 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:49,509 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:49,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 22:05:49,509 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:49,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:49,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1426423327, now seen corresponding path program 2 times [2022-01-18 22:05:49,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:49,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328128429] [2022-01-18 22:05:49,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:49,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:49,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:05:49,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328128429] [2022-01-18 22:05:49,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328128429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:05:49,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:05:49,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-18 22:05:49,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115875047] [2022-01-18 22:05:49,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:05:49,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 22:05:49,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:05:49,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 22:05:49,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-18 22:05:49,584 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:05:49,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:05:49,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:05:49,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:05:49,726 INFO L129 PetriNetUnfolder]: 36/209 cut-off events. [2022-01-18 22:05:49,727 INFO L130 PetriNetUnfolder]: For 768/801 co-relation queries the response was YES. [2022-01-18 22:05:49,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 209 events. 36/209 cut-off events. For 768/801 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 720 event pairs, 1 based on Foata normal form. 25/215 useless extension candidates. Maximal degree in co-relation 551. Up to 44 conditions per place. [2022-01-18 22:05:49,729 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 20 selfloop transitions, 21 changer transitions 11/97 dead transitions. [2022-01-18 22:05:49,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 97 transitions, 749 flow [2022-01-18 22:05:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 22:05:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-01-18 22:05:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2022-01-18 22:05:49,731 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-01-18 22:05:49,731 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2022-01-18 22:05:49,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2022-01-18 22:05:49,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:05:49,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2022-01-18 22:05:49,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,736 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,736 INFO L186 Difference]: Start difference. First operand has 97 places, 79 transitions, 417 flow. Second operand 11 states and 638 transitions. [2022-01-18 22:05:49,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 97 transitions, 749 flow [2022-01-18 22:05:49,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 693 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-01-18 22:05:49,741 INFO L242 Difference]: Finished difference. Result has 104 places, 80 transitions, 470 flow [2022-01-18 22:05:49,741 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=470, PETRI_PLACES=104, PETRI_TRANSITIONS=80} [2022-01-18 22:05:49,743 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-01-18 22:05:49,743 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 80 transitions, 470 flow [2022-01-18 22:05:49,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,745 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:49,745 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:49,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 22:05:49,745 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:49,746 INFO L85 PathProgramCache]: Analyzing trace with hash -949175033, now seen corresponding path program 3 times [2022-01-18 22:05:49,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:49,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697075942] [2022-01-18 22:05:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:49,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:49,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:05:49,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697075942] [2022-01-18 22:05:49,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697075942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 22:05:49,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 22:05:49,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-18 22:05:49,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638499566] [2022-01-18 22:05:49,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 22:05:49,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 22:05:49,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:05:49,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 22:05:49,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-18 22:05:49,853 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:05:49,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 80 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:05:49,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:05:49,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:05:49,944 INFO L129 PetriNetUnfolder]: 37/218 cut-off events. [2022-01-18 22:05:49,944 INFO L130 PetriNetUnfolder]: For 941/976 co-relation queries the response was YES. [2022-01-18 22:05:49,945 INFO L84 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 218 events. 37/218 cut-off events. For 941/976 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 857 event pairs, 0 based on Foata normal form. 31/229 useless extension candidates. Maximal degree in co-relation 598. Up to 45 conditions per place. [2022-01-18 22:05:49,946 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 28 selfloop transitions, 16 changer transitions 5/94 dead transitions. [2022-01-18 22:05:49,946 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 94 transitions, 753 flow [2022-01-18 22:05:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 22:05:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-01-18 22:05:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 526 transitions. [2022-01-18 22:05:49,948 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.834920634920635 [2022-01-18 22:05:49,948 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 526 transitions. [2022-01-18 22:05:49,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 526 transitions. [2022-01-18 22:05:49,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:05:49,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 526 transitions. [2022-01-18 22:05:49,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.44444444444444) internal successors, (526), 9 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,951 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,951 INFO L186 Difference]: Start difference. First operand has 104 places, 80 transitions, 470 flow. Second operand 9 states and 526 transitions. [2022-01-18 22:05:49,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 94 transitions, 753 flow [2022-01-18 22:05:49,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 94 transitions, 677 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-01-18 22:05:49,958 INFO L242 Difference]: Finished difference. Result has 104 places, 85 transitions, 532 flow [2022-01-18 22:05:49,958 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=532, PETRI_PLACES=104, PETRI_TRANSITIONS=85} [2022-01-18 22:05:49,958 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-01-18 22:05:49,959 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 85 transitions, 532 flow [2022-01-18 22:05:49,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:49,959 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:49,959 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:49,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 22:05:49,960 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash -211553739, now seen corresponding path program 1 times [2022-01-18 22:05:49,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:49,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270331087] [2022-01-18 22:05:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:49,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:50,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:05:50,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270331087] [2022-01-18 22:05:50,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270331087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:05:50,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260279433] [2022-01-18 22:05:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:50,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:05:50,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:05:50,063 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:05:50,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 22:05:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:50,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-18 22:05:50,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:05:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:50,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:05:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:50,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260279433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:05:50,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:05:50,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 22:05:50,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456084571] [2022-01-18 22:05:50,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:05:50,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 22:05:50,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:05:50,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 22:05:50,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-18 22:05:50,528 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:05:50,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 85 transitions, 532 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:50,529 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:05:50,529 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:05:50,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:05:50,821 INFO L129 PetriNetUnfolder]: 55/317 cut-off events. [2022-01-18 22:05:50,821 INFO L130 PetriNetUnfolder]: For 1269/1315 co-relation queries the response was YES. [2022-01-18 22:05:50,823 INFO L84 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 317 events. 55/317 cut-off events. For 1269/1315 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1292 event pairs, 1 based on Foata normal form. 34/320 useless extension candidates. Maximal degree in co-relation 885. Up to 67 conditions per place. [2022-01-18 22:05:50,824 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 27 selfloop transitions, 38 changer transitions 14/124 dead transitions. [2022-01-18 22:05:50,824 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 124 transitions, 1220 flow [2022-01-18 22:05:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 22:05:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-01-18 22:05:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2022-01-18 22:05:50,827 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2022-01-18 22:05:50,828 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2022-01-18 22:05:50,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2022-01-18 22:05:50,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:05:50,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2022-01-18 22:05:50,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:50,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:50,834 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:50,834 INFO L186 Difference]: Start difference. First operand has 104 places, 85 transitions, 532 flow. Second operand 20 states and 1159 transitions. [2022-01-18 22:05:50,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 124 transitions, 1220 flow [2022-01-18 22:05:50,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 124 transitions, 1199 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-01-18 22:05:50,841 INFO L242 Difference]: Finished difference. Result has 128 places, 101 transitions, 879 flow [2022-01-18 22:05:50,841 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=879, PETRI_PLACES=128, PETRI_TRANSITIONS=101} [2022-01-18 22:05:50,842 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 58 predicate places. [2022-01-18 22:05:50,843 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 101 transitions, 879 flow [2022-01-18 22:05:50,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:50,843 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:50,843 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:50,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 22:05:51,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:05:51,067 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:51,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:51,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2022110288, now seen corresponding path program 1 times [2022-01-18 22:05:51,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:51,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043304254] [2022-01-18 22:05:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:51,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:05:51,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:05:51,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043304254] [2022-01-18 22:05:51,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043304254] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:05:51,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413254622] [2022-01-18 22:05:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:51,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:05:51,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:05:51,178 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:05:51,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 22:05:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 22:05:51,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:05:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:05:51,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:05:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:05:51,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413254622] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:05:51,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:05:51,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 22:05:51,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127765323] [2022-01-18 22:05:51,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:05:51,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 22:05:51,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:05:51,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 22:05:51,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 22:05:51,772 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:05:51,773 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 101 transitions, 879 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:51,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:05:51,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:05:51,773 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:05:52,135 INFO L129 PetriNetUnfolder]: 77/442 cut-off events. [2022-01-18 22:05:52,135 INFO L130 PetriNetUnfolder]: For 3495/3569 co-relation queries the response was YES. [2022-01-18 22:05:52,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 442 events. 77/442 cut-off events. For 3495/3569 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1833 event pairs, 0 based on Foata normal form. 35/433 useless extension candidates. Maximal degree in co-relation 1532. Up to 103 conditions per place. [2022-01-18 22:05:52,141 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 58 selfloop transitions, 27 changer transitions 26/156 dead transitions. [2022-01-18 22:05:52,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 156 transitions, 2115 flow [2022-01-18 22:05:52,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 22:05:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-01-18 22:05:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2022-01-18 22:05:52,145 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-01-18 22:05:52,145 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2022-01-18 22:05:52,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2022-01-18 22:05:52,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:05:52,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2022-01-18 22:05:52,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:52,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:52,153 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:52,153 INFO L186 Difference]: Start difference. First operand has 128 places, 101 transitions, 879 flow. Second operand 25 states and 1450 transitions. [2022-01-18 22:05:52,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 156 transitions, 2115 flow [2022-01-18 22:05:52,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 156 transitions, 1698 flow, removed 191 selfloop flow, removed 12 redundant places. [2022-01-18 22:05:52,166 INFO L242 Difference]: Finished difference. Result has 154 places, 115 transitions, 1007 flow [2022-01-18 22:05:52,167 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1007, PETRI_PLACES=154, PETRI_TRANSITIONS=115} [2022-01-18 22:05:52,167 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 84 predicate places. [2022-01-18 22:05:52,167 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 115 transitions, 1007 flow [2022-01-18 22:05:52,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:52,168 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:52,168 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:52,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 22:05:52,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-18 22:05:52,391 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:52,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:52,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2046027908, now seen corresponding path program 2 times [2022-01-18 22:05:52,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:52,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266255267] [2022-01-18 22:05:52,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:52,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:05:52,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:05:52,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266255267] [2022-01-18 22:05:52,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266255267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:05:52,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701198075] [2022-01-18 22:05:52,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 22:05:52,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:05:52,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:05:52,506 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:05:52,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 22:05:52,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 22:05:52,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 22:05:52,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 22:05:52,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:05:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:05:52,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:05:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:05:52,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701198075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:05:52,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:05:52,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 22:05:52,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043931697] [2022-01-18 22:05:52,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:05:52,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 22:05:52,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:05:52,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 22:05:52,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 22:05:52,987 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:05:52,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 115 transitions, 1007 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:52,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:05:52,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:05:52,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:05:53,485 INFO L129 PetriNetUnfolder]: 131/812 cut-off events. [2022-01-18 22:05:53,485 INFO L130 PetriNetUnfolder]: For 14446/14599 co-relation queries the response was YES. [2022-01-18 22:05:53,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 812 events. 131/812 cut-off events. For 14446/14599 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4864 event pairs, 0 based on Foata normal form. 44/773 useless extension candidates. Maximal degree in co-relation 3349. Up to 163 conditions per place. [2022-01-18 22:05:53,496 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 83 changer transitions 26/212 dead transitions. [2022-01-18 22:05:53,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 212 transitions, 3549 flow [2022-01-18 22:05:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 22:05:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-01-18 22:05:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1915 transitions. [2022-01-18 22:05:53,500 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.829004329004329 [2022-01-18 22:05:53,500 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1915 transitions. [2022-01-18 22:05:53,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1915 transitions. [2022-01-18 22:05:53,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:05:53,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1915 transitions. [2022-01-18 22:05:53,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.03030303030303) internal successors, (1915), 33 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:53,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:53,510 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:53,511 INFO L186 Difference]: Start difference. First operand has 154 places, 115 transitions, 1007 flow. Second operand 33 states and 1915 transitions. [2022-01-18 22:05:53,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 212 transitions, 3549 flow [2022-01-18 22:05:53,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 212 transitions, 2974 flow, removed 280 selfloop flow, removed 12 redundant places. [2022-01-18 22:05:53,542 INFO L242 Difference]: Finished difference. Result has 188 places, 158 transitions, 1866 flow [2022-01-18 22:05:53,542 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1866, PETRI_PLACES=188, PETRI_TRANSITIONS=158} [2022-01-18 22:05:53,543 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 118 predicate places. [2022-01-18 22:05:53,543 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 158 transitions, 1866 flow [2022-01-18 22:05:53,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:53,543 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:53,544 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:53,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 22:05:53,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:05:53,768 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:53,768 INFO L85 PathProgramCache]: Analyzing trace with hash 40774668, now seen corresponding path program 3 times [2022-01-18 22:05:53,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:53,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170059801] [2022-01-18 22:05:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:53,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:05:53,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:05:53,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170059801] [2022-01-18 22:05:53,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170059801] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:05:53,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098068367] [2022-01-18 22:05:53,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 22:05:53,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:05:53,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:05:53,847 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:05:53,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 22:05:53,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 22:05:53,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 22:05:53,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-18 22:05:53,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:05:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:05:54,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:05:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-18 22:05:54,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098068367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:05:54,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:05:54,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 22:05:54,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447840655] [2022-01-18 22:05:54,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:05:54,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 22:05:54,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:05:54,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 22:05:54,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-01-18 22:05:54,246 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:05:54,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 158 transitions, 1866 flow. Second operand has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:54,247 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:05:54,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:05:54,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:05:54,979 INFO L129 PetriNetUnfolder]: 154/964 cut-off events. [2022-01-18 22:05:54,980 INFO L130 PetriNetUnfolder]: For 33766/33922 co-relation queries the response was YES. [2022-01-18 22:05:54,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5024 conditions, 964 events. 154/964 cut-off events. For 33766/33922 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6276 event pairs, 0 based on Foata normal form. 48/916 useless extension candidates. Maximal degree in co-relation 4928. Up to 197 conditions per place. [2022-01-18 22:05:54,993 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 52 selfloop transitions, 124 changer transitions 31/252 dead transitions. [2022-01-18 22:05:54,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 252 transitions, 5477 flow [2022-01-18 22:05:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 22:05:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-01-18 22:05:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2143 transitions. [2022-01-18 22:05:54,996 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8274131274131274 [2022-01-18 22:05:54,996 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2143 transitions. [2022-01-18 22:05:54,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2143 transitions. [2022-01-18 22:05:54,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:05:54,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2143 transitions. [2022-01-18 22:05:55,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.91891891891892) internal successors, (2143), 37 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:55,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:55,008 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:55,008 INFO L186 Difference]: Start difference. First operand has 188 places, 158 transitions, 1866 flow. Second operand 37 states and 2143 transitions. [2022-01-18 22:05:55,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 252 transitions, 5477 flow [2022-01-18 22:05:55,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 252 transitions, 4629 flow, removed 405 selfloop flow, removed 18 redundant places. [2022-01-18 22:05:55,077 INFO L242 Difference]: Finished difference. Result has 220 places, 193 transitions, 2752 flow [2022-01-18 22:05:55,077 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2752, PETRI_PLACES=220, PETRI_TRANSITIONS=193} [2022-01-18 22:05:55,077 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 150 predicate places. [2022-01-18 22:05:55,078 INFO L470 AbstractCegarLoop]: Abstraction has has 220 places, 193 transitions, 2752 flow [2022-01-18 22:05:55,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:55,078 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:55,078 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:55,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 22:05:55,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:05:55,303 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:55,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:55,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1240022064, now seen corresponding path program 4 times [2022-01-18 22:05:55,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:55,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246580435] [2022-01-18 22:05:55,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:55,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 22:05:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:55,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 22:05:55,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246580435] [2022-01-18 22:05:55,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246580435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 22:05:55,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244436355] [2022-01-18 22:05:55,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 22:05:55,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 22:05:55,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 22:05:55,441 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 22:05:55,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 22:05:55,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 22:05:55,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 22:05:55,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-18 22:05:55,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 22:05:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:55,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 22:05:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 22:05:55,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244436355] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 22:05:55,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 22:05:55,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2022-01-18 22:05:55,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282339095] [2022-01-18 22:05:55,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 22:05:55,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 22:05:55,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 22:05:55,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 22:05:55,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-18 22:05:55,920 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-01-18 22:05:55,921 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 193 transitions, 2752 flow. Second operand has 16 states, 16 states have (on average 56.25) internal successors, (900), 16 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:55,921 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-01-18 22:05:55,921 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-01-18 22:05:55,921 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-01-18 22:05:56,346 INFO L129 PetriNetUnfolder]: 149/985 cut-off events. [2022-01-18 22:05:56,347 INFO L130 PetriNetUnfolder]: For 42928/43032 co-relation queries the response was YES. [2022-01-18 22:05:56,381 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5334 conditions, 985 events. 149/985 cut-off events. For 42928/43032 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6442 event pairs, 1 based on Foata normal form. 32/915 useless extension candidates. Maximal degree in co-relation 5226. Up to 183 conditions per place. [2022-01-18 22:05:56,389 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 61 selfloop transitions, 120 changer transitions 5/231 dead transitions. [2022-01-18 22:05:56,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 231 transitions, 4844 flow [2022-01-18 22:05:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 22:05:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-01-18 22:05:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1327 transitions. [2022-01-18 22:05:56,393 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.824223602484472 [2022-01-18 22:05:56,393 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1327 transitions. [2022-01-18 22:05:56,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1327 transitions. [2022-01-18 22:05:56,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-01-18 22:05:56,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1327 transitions. [2022-01-18 22:05:56,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 57.69565217391305) internal successors, (1327), 23 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:56,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 70.0) internal successors, (1680), 24 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:56,399 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 70.0) internal successors, (1680), 24 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:56,399 INFO L186 Difference]: Start difference. First operand has 220 places, 193 transitions, 2752 flow. Second operand 23 states and 1327 transitions. [2022-01-18 22:05:56,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 231 transitions, 4844 flow [2022-01-18 22:05:56,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 231 transitions, 3908 flow, removed 434 selfloop flow, removed 21 redundant places. [2022-01-18 22:05:56,490 INFO L242 Difference]: Finished difference. Result has 222 places, 209 transitions, 2916 flow [2022-01-18 22:05:56,490 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2236, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2916, PETRI_PLACES=222, PETRI_TRANSITIONS=209} [2022-01-18 22:05:56,491 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 152 predicate places. [2022-01-18 22:05:56,491 INFO L470 AbstractCegarLoop]: Abstraction has has 222 places, 209 transitions, 2916 flow [2022-01-18 22:05:56,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.25) internal successors, (900), 16 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 22:05:56,491 INFO L246 CegarLoopForPetriNet]: Found error trace [2022-01-18 22:05:56,492 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 22:05:56,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 22:05:56,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 22:05:56,707 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 22:05:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 22:05:56,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1578660665, now seen corresponding path program 5 times [2022-01-18 22:05:56,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 22:05:56,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737208132] [2022-01-18 22:05:56,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 22:05:56,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 22:05:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 22:05:56,731 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 22:05:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 22:05:56,771 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 22:05:56,771 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 22:05:56,772 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-01-18 22:05:56,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 22:05:56,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 22:05:56,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-18 22:05:56,777 INFO L732 BasicCegarLoop]: Path program histogram: [5, 3, 2, 1, 1, 1] [2022-01-18 22:05:56,781 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 22:05:56,781 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 22:05:56,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 10:05:56 BasicIcfg [2022-01-18 22:05:56,851 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 22:05:56,852 INFO L158 Benchmark]: Toolchain (without parser) took 9875.14ms. Allocated memory was 360.7MB in the beginning and 480.2MB in the end (delta: 119.5MB). Free memory was 306.2MB in the beginning and 390.8MB in the end (delta: -84.6MB). Peak memory consumption was 35.8MB. Max. memory is 16.0GB. [2022-01-18 22:05:56,852 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 360.7MB. Free memory is still 324.0MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 22:05:56,852 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.46ms. Allocated memory is still 360.7MB. Free memory was 306.1MB in the beginning and 322.7MB in the end (delta: -16.6MB). Peak memory consumption was 15.8MB. Max. memory is 16.0GB. [2022-01-18 22:05:56,852 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.22ms. Allocated memory is still 360.7MB. Free memory was 322.7MB in the beginning and 320.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 22:05:56,852 INFO L158 Benchmark]: Boogie Preprocessor took 30.42ms. Allocated memory is still 360.7MB. Free memory was 320.6MB in the beginning and 319.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 22:05:56,853 INFO L158 Benchmark]: RCFGBuilder took 335.01ms. Allocated memory is still 360.7MB. Free memory was 319.6MB in the beginning and 306.0MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-18 22:05:56,853 INFO L158 Benchmark]: TraceAbstraction took 9084.94ms. Allocated memory was 360.7MB in the beginning and 480.2MB in the end (delta: 119.5MB). Free memory was 306.0MB in the beginning and 390.8MB in the end (delta: -84.9MB). Peak memory consumption was 36.8MB. Max. memory is 16.0GB. [2022-01-18 22:05:56,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 360.7MB. Free memory is still 324.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 369.46ms. Allocated memory is still 360.7MB. Free memory was 306.1MB in the beginning and 322.7MB in the end (delta: -16.6MB). Peak memory consumption was 15.8MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 49.22ms. Allocated memory is still 360.7MB. Free memory was 322.7MB in the beginning and 320.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 30.42ms. Allocated memory is still 360.7MB. Free memory was 320.6MB in the beginning and 319.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 335.01ms. Allocated memory is still 360.7MB. Free memory was 319.6MB in the beginning and 306.0MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 9084.94ms. Allocated memory was 360.7MB in the beginning and 480.2MB in the end (delta: 119.5MB). Free memory was 306.0MB in the beginning and 390.8MB in the end (delta: -84.9MB). Peak memory consumption was 36.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [\old(argc)=49, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L716] 0 int condI = i >= (2*5 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=0] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=4] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L719] 0 int condJ = j >= (2*5 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=15, id1={5:0}, id2={3:0}, j=16, k=4, k=4] [L721] COND TRUE 0 condI || condJ VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=15, id1={5:0}, id2={3:0}, j=16, k=4, k=4] [L722] 0 reach_error() VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=15, id1={5:0}, id2={3:0}, j=16, k=4, k=4] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 8.9s, OverallIterations: 13, TraceHistogramMax: 5, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 427 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 427 mSDsluCounter, 179 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 242 mSDsCounter, 382 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1195 IncrementalHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 382 mSolverCounterUnsat, 56 mSDtfsCounter, 1195 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 855 GetRequests, 611 SyntacticMatches, 4 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2916occurred in iteration=12, InterpolantAutomatonStates: 205, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 994 NumberOfCodeBlocks, 994 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1204 ConstructedInterpolants, 0 QuantifiedInterpolants, 4200 SizeOfPredicates, 32 NumberOfNonLiveVariables, 800 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 22 InterpolantComputations, 7 PerfectInterpolantSequences, 45/390 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 incorrect! [2022-01-18 22:05:56,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...