/usr/bin/java -Xmx8000000000 -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-RepeatedSemanticLbeWithDisjunctivePredicates.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-06 07:48:06,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-06 07:48:06,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-06 07:48:06,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-06 07:48:06,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-06 07:48:06,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-06 07:48:06,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-06 07:48:06,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-06 07:48:06,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-06 07:48:06,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-06 07:48:06,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-06 07:48:06,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-06 07:48:06,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-06 07:48:06,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-06 07:48:06,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-06 07:48:06,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-06 07:48:06,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-06 07:48:06,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-06 07:48:06,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-06 07:48:06,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-06 07:48:06,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-06 07:48:06,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-06 07:48:06,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-06 07:48:06,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-06 07:48:06,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-06 07:48:06,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-06 07:48:06,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-06 07:48:06,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-06 07:48:06,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-06 07:48:06,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-06 07:48:06,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-06 07:48:06,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-06 07:48:06,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-06 07:48:06,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-06 07:48:06,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-06 07:48:06,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-06 07:48:06,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-06 07:48:06,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-06 07:48:06,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-06 07:48:06,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-06 07:48:06,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-06 07:48:06,201 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-RepeatedSemanticLbeWithDisjunctivePredicates.epf [2022-12-06 07:48:06,230 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-06 07:48:06,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-06 07:48:06,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-06 07:48:06,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-06 07:48:06,233 INFO L138 SettingsManager]: * Use SBE=true [2022-12-06 07:48:06,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-06 07:48:06,234 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-06 07:48:06,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-06 07:48:06,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-06 07:48:06,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-06 07:48:06,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-06 07:48:06,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-06 07:48:06,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-06 07:48:06,236 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-06 07:48:06,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-06 07:48:06,236 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-06 07:48:06,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-06 07:48:06,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-06 07:48:06,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-06 07:48:06,237 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-06 07:48:06,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-06 07:48:06,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 07:48:06,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-06 07:48:06,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-06 07:48:06,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-06 07:48:06,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-06 07:48:06,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-06 07:48:06,238 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=REPEATED_LIPTON_PN [2022-12-06 07:48:06,238 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-06 07:48:06,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-06 07:48:06,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-06 07:48:06,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-06 07:48:06,604 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-06 07:48:06,604 INFO L275 PluginConnector]: CDTParser initialized [2022-12-06 07:48:06,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-12-06 07:48:07,793 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-06 07:48:08,004 INFO L351 CDTParser]: Found 1 translation units. [2022-12-06 07:48:08,004 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-12-06 07:48:08,011 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebab403ae/45880c5d005a4ad9a5e2cf955b4bf3c8/FLAGe89d0f18a [2022-12-06 07:48:08,022 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebab403ae/45880c5d005a4ad9a5e2cf955b4bf3c8 [2022-12-06 07:48:08,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-06 07:48:08,026 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-06 07:48:08,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-06 07:48:08,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-06 07:48:08,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-06 07:48:08,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a47c733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08, skipping insertion in model container [2022-12-06 07:48:08,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-06 07:48:08,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-06 07:48:08,165 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 07:48:08,167 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 07:48:08,172 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 07:48:08,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 07:48:08,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 07:48:08,174 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 07:48:08,175 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 07:48:08,176 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 07:48:08,190 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-12-06 07:48:08,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 07:48:08,203 INFO L203 MainTranslator]: Completed pre-run [2022-12-06 07:48:08,223 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 07:48:08,224 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 07:48:08,225 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 07:48:08,226 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 07:48:08,228 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 07:48:08,229 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 07:48:08,234 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 07:48:08,235 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 07:48:08,251 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-12-06 07:48:08,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 07:48:08,269 INFO L208 MainTranslator]: Completed translation [2022-12-06 07:48:08,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08 WrapperNode [2022-12-06 07:48:08,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-06 07:48:08,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-06 07:48:08,271 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-06 07:48:08,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-06 07:48:08,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,293 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,322 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 133 [2022-12-06 07:48:08,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-06 07:48:08,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-06 07:48:08,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-06 07:48:08,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-06 07:48:08,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,359 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-06 07:48:08,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-06 07:48:08,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-06 07:48:08,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-06 07:48:08,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08" (1/1) ... [2022-12-06 07:48:08,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 07:48:08,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:48:08,400 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) [2022-12-06 07:48:08,430 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 [2022-12-06 07:48:08,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-06 07:48:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-06 07:48:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-06 07:48:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-06 07:48:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-06 07:48:08,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-06 07:48:08,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-06 07:48:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-06 07:48:08,448 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-06 07:48:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-06 07:48:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-06 07:48:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-06 07:48:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-06 07:48:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-06 07:48:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-06 07:48:08,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-06 07:48:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-06 07:48:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-06 07:48:08,450 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-06 07:48:08,593 INFO L236 CfgBuilder]: Building ICFG [2022-12-06 07:48:08,594 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-06 07:48:08,806 INFO L277 CfgBuilder]: Performing block encoding [2022-12-06 07:48:08,885 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-06 07:48:08,885 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-06 07:48:08,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:48:08 BoogieIcfgContainer [2022-12-06 07:48:08,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-06 07:48:08,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-06 07:48:08,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-06 07:48:08,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-06 07:48:08,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:48:08" (1/3) ... [2022-12-06 07:48:08,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c68405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:48:08, skipping insertion in model container [2022-12-06 07:48:08,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:48:08" (2/3) ... [2022-12-06 07:48:08,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c68405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:48:08, skipping insertion in model container [2022-12-06 07:48:08,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:48:08" (3/3) ... [2022-12-06 07:48:08,894 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-12-06 07:48:08,911 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-06 07:48:08,911 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-06 07:48:08,911 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-06 07:48:08,985 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-06 07:48:09,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 124 transitions, 280 flow [2022-12-06 07:48:09,156 INFO L130 PetriNetUnfolder]: 10/120 cut-off events. [2022-12-06 07:48:09,156 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-06 07:48:09,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 120 events. 10/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-12-06 07:48:09,163 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 124 transitions, 280 flow [2022-12-06 07:48:09,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 108 transitions, 240 flow [2022-12-06 07:48:09,171 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:09,199 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 108 transitions, 240 flow [2022-12-06 07:48:09,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 108 transitions, 240 flow [2022-12-06 07:48:09,262 INFO L130 PetriNetUnfolder]: 10/108 cut-off events. [2022-12-06 07:48:09,263 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-06 07:48:09,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 108 events. 10/108 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 42 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-12-06 07:48:09,267 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 108 transitions, 240 flow [2022-12-06 07:48:09,268 INFO L188 LiptonReduction]: Number of co-enabled transitions 1224 [2022-12-06 07:48:13,633 INFO L203 LiptonReduction]: Total number of compositions: 83 [2022-12-06 07:48:13,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-06 07:48:13,659 INFO L357 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=REPEATED_LIPTON_PN, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@78fd9723, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-06 07:48:13,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-06 07:48:13,669 INFO L130 PetriNetUnfolder]: 4/24 cut-off events. [2022-12-06 07:48:13,670 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-06 07:48:13,670 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:13,671 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 07:48:13,671 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:13,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2052267608, now seen corresponding path program 1 times [2022-12-06 07:48:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:13,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618896344] [2022-12-06 07:48:13,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:13,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:14,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:14,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618896344] [2022-12-06 07:48:14,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618896344] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 07:48:14,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 07:48:14,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-06 07:48:14,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874812024] [2022-12-06 07:48:14,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:48:14,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-06 07:48:14,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:14,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-06 07:48:14,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-06 07:48:14,143 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-06 07:48:14,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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) [2022-12-06 07:48:14,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:14,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-06 07:48:14,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:14,282 INFO L130 PetriNetUnfolder]: 431/611 cut-off events. [2022-12-06 07:48:14,283 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2022-12-06 07:48:14,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 611 events. 431/611 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1712 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 928. Up to 405 conditions per place. [2022-12-06 07:48:14,292 INFO L137 encePairwiseOnDemand]: 19/25 looper letters, 39 selfloop transitions, 3 changer transitions 3/45 dead transitions. [2022-12-06 07:48:14,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 225 flow [2022-12-06 07:48:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-06 07:48:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-06 07:48:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2022-12-06 07:48:14,303 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.64 [2022-12-06 07:48:14,305 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 48 transitions. [2022-12-06 07:48:14,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 225 flow [2022-12-06 07:48:14,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 45 transitions, 195 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-06 07:48:14,312 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 81 flow [2022-12-06 07:48:14,313 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2022-12-06 07:48:14,317 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2022-12-06 07:48:14,317 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:14,318 INFO L89 Accepts]: Start accepts. Operand has 29 places, 27 transitions, 81 flow [2022-12-06 07:48:14,321 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:14,321 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:14,321 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 29 places, 27 transitions, 81 flow [2022-12-06 07:48:14,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 27 transitions, 81 flow [2022-12-06 07:48:14,333 INFO L380 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([403] L79-->L79: Formula: (and (not (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_5| 0)) (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_5| (ite (< 0 v_~counter~0_84) 1 0)) (< v_~j2~0_33 v_~M2~0_14) (= (+ v_~counter~0_83 1) v_~counter~0_84) (= (+ v_~j2~0_33 1) v_~j2~0_32) (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_5| |v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_5|)) InVars {~counter~0=v_~counter~0_84, ~M2~0=v_~M2~0_14, ~j2~0=v_~j2~0_33} OutVars{~counter~0=v_~counter~0_83, ~M2~0=v_~M2~0_14, thread4Thread1of1ForFork1_#t~post8#1=|v_thread4Thread1of1ForFork1_#t~post8#1_5|, thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_5|, thread4Thread1of1ForFork1_#t~post7#1=|v_thread4Thread1of1ForFork1_#t~post7#1_5|, ~j2~0=v_~j2~0_32, thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_5|} AuxVars[] AssignedVars[~counter~0, thread4Thread1of1ForFork1_#t~post8#1, thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork1_#t~post7#1, ~j2~0, thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1][18], [130#true, 33#L67true, Black: 132#(= ~counter~0 0), 32#L56true, 45#L44true, 105#L79true, 68#L98-4true]) [2022-12-06 07:48:14,333 INFO L382 tUnfolder$Statistics]: this new event has 11 ancestors and is cut-off event [2022-12-06 07:48:14,333 INFO L385 tUnfolder$Statistics]: existing Event has 11 ancestors and is cut-off event [2022-12-06 07:48:14,334 INFO L385 tUnfolder$Statistics]: existing Event has 10 ancestors and is cut-off event [2022-12-06 07:48:14,334 INFO L385 tUnfolder$Statistics]: existing Event has 10 ancestors and is cut-off event [2022-12-06 07:48:14,337 INFO L130 PetriNetUnfolder]: 17/53 cut-off events. [2022-12-06 07:48:14,340 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-06 07:48:14,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 53 events. 17/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 51. Up to 20 conditions per place. [2022-12-06 07:48:14,346 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 29 places, 27 transitions, 81 flow [2022-12-06 07:48:14,346 INFO L188 LiptonReduction]: Number of co-enabled transitions 188 [2022-12-06 07:48:14,347 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:48:14,350 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 33 [2022-12-06 07:48:14,350 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 81 flow [2022-12-06 07:48:14,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 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) [2022-12-06 07:48:14,350 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:14,351 INFO L213 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] [2022-12-06 07:48:14,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-06 07:48:14,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:14,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:14,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1346749667, now seen corresponding path program 1 times [2022-12-06 07:48:14,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:14,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991765697] [2022-12-06 07:48:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:14,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:14,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:14,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991765697] [2022-12-06 07:48:14,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991765697] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 07:48:14,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 07:48:14,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 07:48:14,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775095351] [2022-12-06 07:48:14,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:48:14,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-06 07:48:14,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:14,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-06 07:48:14,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-06 07:48:14,592 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-06 07:48:14,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:14,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:14,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-06 07:48:14,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:14,786 INFO L130 PetriNetUnfolder]: 611/869 cut-off events. [2022-12-06 07:48:14,787 INFO L131 PetriNetUnfolder]: For 277/277 co-relation queries the response was YES. [2022-12-06 07:48:14,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2096 conditions, 869 events. 611/869 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2779 event pairs, 51 based on Foata normal form. 48/917 useless extension candidates. Maximal degree in co-relation 720. Up to 397 conditions per place. [2022-12-06 07:48:14,810 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 66 selfloop transitions, 8 changer transitions 4/78 dead transitions. [2022-12-06 07:48:14,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 78 transitions, 377 flow [2022-12-06 07:48:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-06 07:48:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-06 07:48:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2022-12-06 07:48:14,812 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.608 [2022-12-06 07:48:14,812 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 81 flow. Second operand 5 states and 76 transitions. [2022-12-06 07:48:14,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 78 transitions, 377 flow [2022-12-06 07:48:14,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 78 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-06 07:48:14,815 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 133 flow [2022-12-06 07:48:14,815 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=133, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2022-12-06 07:48:14,816 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2022-12-06 07:48:14,816 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:14,816 INFO L89 Accepts]: Start accepts. Operand has 34 places, 33 transitions, 133 flow [2022-12-06 07:48:14,818 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:14,818 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:14,818 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 34 places, 33 transitions, 133 flow [2022-12-06 07:48:14,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 33 transitions, 133 flow [2022-12-06 07:48:14,822 INFO L380 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([403] L79-->L79: Formula: (and (not (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_5| 0)) (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_5| (ite (< 0 v_~counter~0_84) 1 0)) (< v_~j2~0_33 v_~M2~0_14) (= (+ v_~counter~0_83 1) v_~counter~0_84) (= (+ v_~j2~0_33 1) v_~j2~0_32) (= |v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_5| |v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_5|)) InVars {~counter~0=v_~counter~0_84, ~M2~0=v_~M2~0_14, ~j2~0=v_~j2~0_33} OutVars{~counter~0=v_~counter~0_83, ~M2~0=v_~M2~0_14, thread4Thread1of1ForFork1_#t~post8#1=|v_thread4Thread1of1ForFork1_#t~post8#1_5|, thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1=|v_thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_5|, thread4Thread1of1ForFork1_#t~post7#1=|v_thread4Thread1of1ForFork1_#t~post7#1_5|, ~j2~0=v_~j2~0_32, thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1=|v_thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1_5|} AuxVars[] AssignedVars[~counter~0, thread4Thread1of1ForFork1_#t~post8#1, thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond#1, thread4Thread1of1ForFork1_#t~post7#1, ~j2~0, thread4Thread1of1ForFork1_assume_abort_if_not_~cond#1][24], [33#L67true, Black: 132#(= ~counter~0 0), 32#L56true, 134#true, 45#L44true, 105#L79true, Black: 136#(and (<= ~M1~0 (+ ~N1~0 ~j1~0)) (= ~i1~0 0) (= ~M1~0 ~N1~0) (= ~M2~0 ~N1~0) (= ~N2~0 ~N1~0)), Black: 139#(and (<= ~M1~0 (+ ~N1~0 ~j1~0)) (= ~i1~0 0) (= ~M1~0 ~N1~0) (= ~M2~0 ~N1~0) (<= ~M1~0 ~j1~0) (= ~N2~0 ~N1~0)), 68#L98-4true]) [2022-12-06 07:48:14,822 INFO L382 tUnfolder$Statistics]: this new event has 11 ancestors and is cut-off event [2022-12-06 07:48:14,822 INFO L385 tUnfolder$Statistics]: existing Event has 11 ancestors and is cut-off event [2022-12-06 07:48:14,822 INFO L385 tUnfolder$Statistics]: existing Event has 10 ancestors and is cut-off event [2022-12-06 07:48:14,822 INFO L385 tUnfolder$Statistics]: existing Event has 11 ancestors and is cut-off event [2022-12-06 07:48:14,826 INFO L130 PetriNetUnfolder]: 32/89 cut-off events. [2022-12-06 07:48:14,826 INFO L131 PetriNetUnfolder]: For 25/32 co-relation queries the response was YES. [2022-12-06 07:48:14,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 89 events. 32/89 cut-off events. For 25/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 197 event pairs, 0 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 126. Up to 35 conditions per place. [2022-12-06 07:48:14,827 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 34 places, 33 transitions, 133 flow [2022-12-06 07:48:14,828 INFO L188 LiptonReduction]: Number of co-enabled transitions 264 [2022-12-06 07:48:14,829 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:48:14,830 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 14 [2022-12-06 07:48:14,831 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 133 flow [2022-12-06 07:48:14,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:14,831 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:14,831 INFO L213 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] [2022-12-06 07:48:14,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-06 07:48:14,832 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:14,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127190, now seen corresponding path program 1 times [2022-12-06 07:48:14,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:14,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455437935] [2022-12-06 07:48:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:14,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:15,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:15,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455437935] [2022-12-06 07:48:15,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455437935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:48:15,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396341019] [2022-12-06 07:48:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:15,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:15,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:48:15,055 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) [2022-12-06 07:48:15,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-06 07:48:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:15,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-06 07:48:15,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:48:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:15,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:48:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:15,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396341019] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-06 07:48:15,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-06 07:48:15,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2022-12-06 07:48:15,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987260712] [2022-12-06 07:48:15,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:48:15,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-06 07:48:15,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:15,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-06 07:48:15,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-06 07:48:15,361 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-06 07:48:15,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:15,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:15,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-06 07:48:15,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:15,533 INFO L130 PetriNetUnfolder]: 927/1317 cut-off events. [2022-12-06 07:48:15,533 INFO L131 PetriNetUnfolder]: For 768/768 co-relation queries the response was YES. [2022-12-06 07:48:15,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3785 conditions, 1317 events. 927/1317 cut-off events. For 768/768 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4499 event pairs, 233 based on Foata normal form. 36/1353 useless extension candidates. Maximal degree in co-relation 1253. Up to 563 conditions per place. [2022-12-06 07:48:15,541 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 65 selfloop transitions, 8 changer transitions 2/75 dead transitions. [2022-12-06 07:48:15,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 75 transitions, 419 flow [2022-12-06 07:48:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-06 07:48:15,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-06 07:48:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2022-12-06 07:48:15,544 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.67 [2022-12-06 07:48:15,544 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 133 flow. Second operand 4 states and 67 transitions. [2022-12-06 07:48:15,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 75 transitions, 419 flow [2022-12-06 07:48:15,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 75 transitions, 419 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-06 07:48:15,549 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 180 flow [2022-12-06 07:48:15,550 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2022-12-06 07:48:15,551 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2022-12-06 07:48:15,553 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:15,555 INFO L89 Accepts]: Start accepts. Operand has 39 places, 36 transitions, 180 flow [2022-12-06 07:48:15,557 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:15,557 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:15,557 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 36 transitions, 180 flow [2022-12-06 07:48:15,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 36 transitions, 180 flow [2022-12-06 07:48:15,567 INFO L130 PetriNetUnfolder]: 45/123 cut-off events. [2022-12-06 07:48:15,567 INFO L131 PetriNetUnfolder]: For 96/109 co-relation queries the response was YES. [2022-12-06 07:48:15,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 123 events. 45/123 cut-off events. For 96/109 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 365 event pairs, 2 based on Foata normal form. 4/112 useless extension candidates. Maximal degree in co-relation 216. Up to 55 conditions per place. [2022-12-06 07:48:15,568 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 36 transitions, 180 flow [2022-12-06 07:48:15,568 INFO L188 LiptonReduction]: Number of co-enabled transitions 304 [2022-12-06 07:48:15,574 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [438] L44-->L44: Formula: (and (= v_~i1~0_26 (+ v_~i1~0_27 1)) (< v_~i1~0_27 v_~N1~0_12) (= (+ v_~counter~0_96 1) v_~counter~0_95)) InVars {~counter~0=v_~counter~0_96, ~i1~0=v_~i1~0_27, ~N1~0=v_~N1~0_12} OutVars{~counter~0=v_~counter~0_95, thread1Thread1of1ForFork0_#t~post1=|v_thread1Thread1of1ForFork0_#t~post1_5|, thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_5|, ~i1~0=v_~i1~0_26, ~N1~0=v_~N1~0_12} AuxVars[] AssignedVars[~counter~0, thread1Thread1of1ForFork0_#t~post1, thread1Thread1of1ForFork0_#t~post2, ~i1~0] and [425] L67-->L67: Formula: (and (= (+ v_~counter~0_92 1) v_~counter~0_91) (< v_~j1~0_23 v_~M1~0_14) (= v_~j1~0_22 (+ v_~j1~0_23 1))) InVars {~counter~0=v_~counter~0_92, ~j1~0=v_~j1~0_23, ~M1~0=v_~M1~0_14} OutVars{~counter~0=v_~counter~0_91, ~j1~0=v_~j1~0_22, thread3Thread1of1ForFork3_#t~post6=|v_thread3Thread1of1ForFork3_#t~post6_5|, ~M1~0=v_~M1~0_14, thread3Thread1of1ForFork3_#t~post5=|v_thread3Thread1of1ForFork3_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, ~j1~0, thread3Thread1of1ForFork3_#t~post6, thread3Thread1of1ForFork3_#t~post5] [2022-12-06 07:48:15,606 INFO L203 LiptonReduction]: Total number of compositions: 1 [2022-12-06 07:48:15,607 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 54 [2022-12-06 07:48:15,607 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 194 flow [2022-12-06 07:48:15,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:15,607 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:15,607 INFO L213 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] [2022-12-06 07:48:15,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-06 07:48:15,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:15,814 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:15,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:15,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1270105152, now seen corresponding path program 2 times [2022-12-06 07:48:15,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:15,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60775305] [2022-12-06 07:48:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:15,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:15,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:15,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60775305] [2022-12-06 07:48:15,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60775305] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 07:48:15,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 07:48:15,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 07:48:15,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666534047] [2022-12-06 07:48:15,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:48:15,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-06 07:48:15,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:15,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-06 07:48:15,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-06 07:48:15,998 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-06 07:48:15,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:15,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:15,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-06 07:48:15,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:16,197 INFO L130 PetriNetUnfolder]: 1025/1463 cut-off events. [2022-12-06 07:48:16,198 INFO L131 PetriNetUnfolder]: For 2130/2130 co-relation queries the response was YES. [2022-12-06 07:48:16,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4599 conditions, 1463 events. 1025/1463 cut-off events. For 2130/2130 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5254 event pairs, 161 based on Foata normal form. 46/1509 useless extension candidates. Maximal degree in co-relation 1986. Up to 1109 conditions per place. [2022-12-06 07:48:16,207 INFO L137 encePairwiseOnDemand]: 21/26 looper letters, 66 selfloop transitions, 9 changer transitions 2/77 dead transitions. [2022-12-06 07:48:16,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 77 transitions, 504 flow [2022-12-06 07:48:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-06 07:48:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-06 07:48:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2022-12-06 07:48:16,209 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2022-12-06 07:48:16,209 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 194 flow. Second operand 4 states and 61 transitions. [2022-12-06 07:48:16,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 77 transitions, 504 flow [2022-12-06 07:48:16,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 504 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-06 07:48:16,216 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 266 flow [2022-12-06 07:48:16,216 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2022-12-06 07:48:16,217 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2022-12-06 07:48:16,217 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:16,217 INFO L89 Accepts]: Start accepts. Operand has 45 places, 42 transitions, 266 flow [2022-12-06 07:48:16,218 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:16,218 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:16,219 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 42 transitions, 266 flow [2022-12-06 07:48:16,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 266 flow [2022-12-06 07:48:16,240 INFO L130 PetriNetUnfolder]: 110/252 cut-off events. [2022-12-06 07:48:16,240 INFO L131 PetriNetUnfolder]: For 332/380 co-relation queries the response was YES. [2022-12-06 07:48:16,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 252 events. 110/252 cut-off events. For 332/380 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1025 event pairs, 15 based on Foata normal form. 11/236 useless extension candidates. Maximal degree in co-relation 598. Up to 102 conditions per place. [2022-12-06 07:48:16,243 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 42 transitions, 266 flow [2022-12-06 07:48:16,244 INFO L188 LiptonReduction]: Number of co-enabled transitions 348 [2022-12-06 07:48:16,246 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:48:16,249 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 32 [2022-12-06 07:48:16,249 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 266 flow [2022-12-06 07:48:16,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:16,249 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:16,249 INFO L213 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] [2022-12-06 07:48:16,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-06 07:48:16,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1381259540, now seen corresponding path program 3 times [2022-12-06 07:48:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:16,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473374205] [2022-12-06 07:48:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:16,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:16,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:16,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473374205] [2022-12-06 07:48:16,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473374205] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 07:48:16,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 07:48:16,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 07:48:16,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754302351] [2022-12-06 07:48:16,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:48:16,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-06 07:48:16,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:16,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-06 07:48:16,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-06 07:48:16,381 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-06 07:48:16,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:16,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:16,382 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-06 07:48:16,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:16,582 INFO L130 PetriNetUnfolder]: 921/1307 cut-off events. [2022-12-06 07:48:16,582 INFO L131 PetriNetUnfolder]: For 2401/2401 co-relation queries the response was YES. [2022-12-06 07:48:16,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4765 conditions, 1307 events. 921/1307 cut-off events. For 2401/2401 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4487 event pairs, 157 based on Foata normal form. 6/1313 useless extension candidates. Maximal degree in co-relation 3197. Up to 1219 conditions per place. [2022-12-06 07:48:16,591 INFO L137 encePairwiseOnDemand]: 21/25 looper letters, 47 selfloop transitions, 3 changer transitions 14/64 dead transitions. [2022-12-06 07:48:16,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 453 flow [2022-12-06 07:48:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-06 07:48:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-06 07:48:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2022-12-06 07:48:16,592 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.51 [2022-12-06 07:48:16,592 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 266 flow. Second operand 4 states and 51 transitions. [2022-12-06 07:48:16,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 453 flow [2022-12-06 07:48:16,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-06 07:48:16,595 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 259 flow [2022-12-06 07:48:16,595 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=259, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2022-12-06 07:48:16,596 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 13 predicate places. [2022-12-06 07:48:16,596 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:16,596 INFO L89 Accepts]: Start accepts. Operand has 47 places, 41 transitions, 259 flow [2022-12-06 07:48:16,597 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:16,597 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:16,597 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 47 places, 41 transitions, 259 flow [2022-12-06 07:48:16,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 41 transitions, 259 flow [2022-12-06 07:48:16,613 INFO L130 PetriNetUnfolder]: 99/216 cut-off events. [2022-12-06 07:48:16,613 INFO L131 PetriNetUnfolder]: For 301/346 co-relation queries the response was YES. [2022-12-06 07:48:16,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 216 events. 99/216 cut-off events. For 301/346 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 801 event pairs, 14 based on Foata normal form. 14/211 useless extension candidates. Maximal degree in co-relation 533. Up to 90 conditions per place. [2022-12-06 07:48:16,616 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 46 places, 41 transitions, 259 flow [2022-12-06 07:48:16,616 INFO L188 LiptonReduction]: Number of co-enabled transitions 340 [2022-12-06 07:48:16,617 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:48:16,618 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 22 [2022-12-06 07:48:16,618 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 259 flow [2022-12-06 07:48:16,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:16,618 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:16,618 INFO L213 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] [2022-12-06 07:48:16,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-06 07:48:16,618 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:16,619 INFO L85 PathProgramCache]: Analyzing trace with hash -301548381, now seen corresponding path program 2 times [2022-12-06 07:48:16,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:16,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836288204] [2022-12-06 07:48:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:16,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:16,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:16,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836288204] [2022-12-06 07:48:16,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836288204] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 07:48:16,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 07:48:16,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 07:48:16,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495156071] [2022-12-06 07:48:16,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:48:16,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-06 07:48:16,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:16,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-06 07:48:16,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-06 07:48:16,775 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-06 07:48:16,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 259 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:16,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:16,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-06 07:48:16,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:16,936 INFO L130 PetriNetUnfolder]: 993/1392 cut-off events. [2022-12-06 07:48:16,936 INFO L131 PetriNetUnfolder]: For 3355/3355 co-relation queries the response was YES. [2022-12-06 07:48:16,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5146 conditions, 1392 events. 993/1392 cut-off events. For 3355/3355 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4747 event pairs, 151 based on Foata normal form. 26/1418 useless extension candidates. Maximal degree in co-relation 3057. Up to 1231 conditions per place. [2022-12-06 07:48:16,945 INFO L137 encePairwiseOnDemand]: 21/25 looper letters, 50 selfloop transitions, 4 changer transitions 15/69 dead transitions. [2022-12-06 07:48:16,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 508 flow [2022-12-06 07:48:16,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-06 07:48:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-06 07:48:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2022-12-06 07:48:16,947 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.53 [2022-12-06 07:48:16,947 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 259 flow. Second operand 4 states and 53 transitions. [2022-12-06 07:48:16,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 508 flow [2022-12-06 07:48:16,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 69 transitions, 498 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-06 07:48:16,951 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 289 flow [2022-12-06 07:48:16,951 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=289, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2022-12-06 07:48:16,954 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2022-12-06 07:48:16,954 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:16,954 INFO L89 Accepts]: Start accepts. Operand has 49 places, 43 transitions, 289 flow [2022-12-06 07:48:16,957 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:16,957 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:16,957 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 49 places, 43 transitions, 289 flow [2022-12-06 07:48:16,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 43 transitions, 289 flow [2022-12-06 07:48:16,974 INFO L130 PetriNetUnfolder]: 94/213 cut-off events. [2022-12-06 07:48:16,974 INFO L131 PetriNetUnfolder]: For 468/506 co-relation queries the response was YES. [2022-12-06 07:48:16,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 213 events. 94/213 cut-off events. For 468/506 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 804 event pairs, 15 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 617. Up to 83 conditions per place. [2022-12-06 07:48:16,977 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 48 places, 43 transitions, 289 flow [2022-12-06 07:48:16,977 INFO L188 LiptonReduction]: Number of co-enabled transitions 360 [2022-12-06 07:48:16,979 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:48:16,980 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 26 [2022-12-06 07:48:16,980 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 289 flow [2022-12-06 07:48:16,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:16,980 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:16,981 INFO L213 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] [2022-12-06 07:48:16,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-06 07:48:16,981 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:16,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:16,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1458812427, now seen corresponding path program 3 times [2022-12-06 07:48:16,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:16,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976348713] [2022-12-06 07:48:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:16,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:17,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:17,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976348713] [2022-12-06 07:48:17,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976348713] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 07:48:17,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 07:48:17,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 07:48:17,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801149399] [2022-12-06 07:48:17,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:48:17,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-06 07:48:17,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:17,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-06 07:48:17,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-06 07:48:17,111 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-06 07:48:17,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 289 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:17,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:17,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-06 07:48:17,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:17,420 INFO L130 PetriNetUnfolder]: 1595/2234 cut-off events. [2022-12-06 07:48:17,421 INFO L131 PetriNetUnfolder]: For 7931/7931 co-relation queries the response was YES. [2022-12-06 07:48:17,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8662 conditions, 2234 events. 1595/2234 cut-off events. For 7931/7931 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8489 event pairs, 126 based on Foata normal form. 54/2288 useless extension candidates. Maximal degree in co-relation 8248. Up to 837 conditions per place. [2022-12-06 07:48:17,443 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 101 selfloop transitions, 10 changer transitions 3/114 dead transitions. [2022-12-06 07:48:17,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 114 transitions, 977 flow [2022-12-06 07:48:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-06 07:48:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-06 07:48:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2022-12-06 07:48:17,446 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.544 [2022-12-06 07:48:17,446 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 289 flow. Second operand 5 states and 68 transitions. [2022-12-06 07:48:17,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 114 transitions, 977 flow [2022-12-06 07:48:17,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 114 transitions, 960 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-06 07:48:17,454 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 380 flow [2022-12-06 07:48:17,454 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2022-12-06 07:48:17,455 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2022-12-06 07:48:17,455 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:17,455 INFO L89 Accepts]: Start accepts. Operand has 52 places, 52 transitions, 380 flow [2022-12-06 07:48:17,456 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:17,456 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:17,456 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 52 transitions, 380 flow [2022-12-06 07:48:17,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 52 transitions, 380 flow [2022-12-06 07:48:17,478 INFO L130 PetriNetUnfolder]: 102/285 cut-off events. [2022-12-06 07:48:17,478 INFO L131 PetriNetUnfolder]: For 638/680 co-relation queries the response was YES. [2022-12-06 07:48:17,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 285 events. 102/285 cut-off events. For 638/680 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1417 event pairs, 14 based on Foata normal form. 12/275 useless extension candidates. Maximal degree in co-relation 743. Up to 93 conditions per place. [2022-12-06 07:48:17,481 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 52 transitions, 380 flow [2022-12-06 07:48:17,482 INFO L188 LiptonReduction]: Number of co-enabled transitions 520 [2022-12-06 07:48:17,483 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:48:17,484 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 29 [2022-12-06 07:48:17,484 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 380 flow [2022-12-06 07:48:17,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:17,484 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:17,484 INFO L213 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] [2022-12-06 07:48:17,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-06 07:48:17,485 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:17,485 INFO L85 PathProgramCache]: Analyzing trace with hash 640663373, now seen corresponding path program 4 times [2022-12-06 07:48:17,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:17,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869106287] [2022-12-06 07:48:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:17,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:17,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:17,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869106287] [2022-12-06 07:48:17,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869106287] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 07:48:17,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 07:48:17,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 07:48:17,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878403388] [2022-12-06 07:48:17,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:48:17,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-06 07:48:17,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-06 07:48:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-06 07:48:17,621 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-06 07:48:17,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 380 flow. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:17,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:17,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-06 07:48:17,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:17,822 INFO L130 PetriNetUnfolder]: 1175/1614 cut-off events. [2022-12-06 07:48:17,822 INFO L131 PetriNetUnfolder]: For 7392/7392 co-relation queries the response was YES. [2022-12-06 07:48:17,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7408 conditions, 1614 events. 1175/1614 cut-off events. For 7392/7392 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5272 event pairs, 351 based on Foata normal form. 80/1694 useless extension candidates. Maximal degree in co-relation 5945. Up to 1335 conditions per place. [2022-12-06 07:48:17,834 INFO L137 encePairwiseOnDemand]: 21/25 looper letters, 56 selfloop transitions, 7 changer transitions 2/65 dead transitions. [2022-12-06 07:48:17,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 543 flow [2022-12-06 07:48:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-06 07:48:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-06 07:48:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2022-12-06 07:48:17,836 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.46 [2022-12-06 07:48:17,836 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 380 flow. Second operand 4 states and 46 transitions. [2022-12-06 07:48:17,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 543 flow [2022-12-06 07:48:17,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 65 transitions, 535 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-06 07:48:17,847 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 330 flow [2022-12-06 07:48:17,847 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2022-12-06 07:48:17,849 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 22 predicate places. [2022-12-06 07:48:17,849 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:17,849 INFO L89 Accepts]: Start accepts. Operand has 56 places, 45 transitions, 330 flow [2022-12-06 07:48:17,851 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:17,851 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:17,851 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 56 places, 45 transitions, 330 flow [2022-12-06 07:48:17,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 45 transitions, 330 flow [2022-12-06 07:48:17,866 INFO L130 PetriNetUnfolder]: 88/197 cut-off events. [2022-12-06 07:48:17,866 INFO L131 PetriNetUnfolder]: For 553/583 co-relation queries the response was YES. [2022-12-06 07:48:17,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 197 events. 88/197 cut-off events. For 553/583 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 720 event pairs, 12 based on Foata normal form. 8/191 useless extension candidates. Maximal degree in co-relation 646. Up to 95 conditions per place. [2022-12-06 07:48:17,869 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 45 transitions, 330 flow [2022-12-06 07:48:17,869 INFO L188 LiptonReduction]: Number of co-enabled transitions 406 [2022-12-06 07:48:17,870 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:48:17,872 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 23 [2022-12-06 07:48:17,872 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 330 flow [2022-12-06 07:48:17,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-12-06 07:48:17,872 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:17,872 INFO L213 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] [2022-12-06 07:48:17,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-06 07:48:17,873 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:17,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:17,873 INFO L85 PathProgramCache]: Analyzing trace with hash -829252047, now seen corresponding path program 1 times [2022-12-06 07:48:17,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:17,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229816812] [2022-12-06 07:48:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:17,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:18,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:18,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229816812] [2022-12-06 07:48:18,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229816812] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:48:18,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381578405] [2022-12-06 07:48:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:18,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:18,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:48:18,036 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) [2022-12-06 07:48:18,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-06 07:48:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:18,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-06 07:48:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:48:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:18,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:48:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:18,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381578405] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-06 07:48:18,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-06 07:48:18,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2022-12-06 07:48:18,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142326285] [2022-12-06 07:48:18,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:48:18,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-06 07:48:18,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:18,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-06 07:48:18,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-06 07:48:18,253 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-06 07:48:18,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-12-06 07:48:18,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:18,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-06 07:48:18,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:18,558 INFO L130 PetriNetUnfolder]: 1949/2708 cut-off events. [2022-12-06 07:48:18,558 INFO L131 PetriNetUnfolder]: For 10271/10271 co-relation queries the response was YES. [2022-12-06 07:48:18,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12273 conditions, 2708 events. 1949/2708 cut-off events. For 10271/10271 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10518 event pairs, 307 based on Foata normal form. 92/2800 useless extension candidates. Maximal degree in co-relation 8866. Up to 1475 conditions per place. [2022-12-06 07:48:18,580 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 87 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2022-12-06 07:48:18,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 97 transitions, 829 flow [2022-12-06 07:48:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-06 07:48:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-06 07:48:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2022-12-06 07:48:18,582 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.62 [2022-12-06 07:48:18,582 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 330 flow. Second operand 4 states and 62 transitions. [2022-12-06 07:48:18,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 97 transitions, 829 flow [2022-12-06 07:48:18,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 97 transitions, 806 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-12-06 07:48:18,628 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 386 flow [2022-12-06 07:48:18,628 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=386, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2022-12-06 07:48:18,629 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 23 predicate places. [2022-12-06 07:48:18,629 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:18,629 INFO L89 Accepts]: Start accepts. Operand has 57 places, 49 transitions, 386 flow [2022-12-06 07:48:18,630 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:18,630 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:18,631 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 49 transitions, 386 flow [2022-12-06 07:48:18,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 49 transitions, 386 flow [2022-12-06 07:48:18,654 INFO L130 PetriNetUnfolder]: 142/312 cut-off events. [2022-12-06 07:48:18,655 INFO L131 PetriNetUnfolder]: For 859/921 co-relation queries the response was YES. [2022-12-06 07:48:18,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1178 conditions, 312 events. 142/312 cut-off events. For 859/921 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1389 event pairs, 22 based on Foata normal form. 9/302 useless extension candidates. Maximal degree in co-relation 1069. Up to 154 conditions per place. [2022-12-06 07:48:18,659 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 49 transitions, 386 flow [2022-12-06 07:48:18,659 INFO L188 LiptonReduction]: Number of co-enabled transitions 490 [2022-12-06 07:48:18,660 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:48:18,661 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 32 [2022-12-06 07:48:18,661 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 386 flow [2022-12-06 07:48:18,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-12-06 07:48:18,661 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:18,661 INFO L213 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] [2022-12-06 07:48:18,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-06 07:48:18,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-06 07:48:18,866 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:18,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash -127048006, now seen corresponding path program 1 times [2022-12-06 07:48:18,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:18,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371390617] [2022-12-06 07:48:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:18,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-06 07:48:18,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:18,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371390617] [2022-12-06 07:48:18,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371390617] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:48:18,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647381752] [2022-12-06 07:48:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:18,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:18,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:48:18,998 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) [2022-12-06 07:48:19,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-06 07:48:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:19,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-06 07:48:19,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:48:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-06 07:48:19,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:48:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-06 07:48:19,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647381752] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-06 07:48:19,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-06 07:48:19,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2022-12-06 07:48:19,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065889950] [2022-12-06 07:48:19,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:48:19,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-06 07:48:19,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:19,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-06 07:48:19,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-06 07:48:19,230 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-06 07:48:19,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 386 flow. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-12-06 07:48:19,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:19,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-06 07:48:19,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:19,570 INFO L130 PetriNetUnfolder]: 2395/3362 cut-off events. [2022-12-06 07:48:19,570 INFO L131 PetriNetUnfolder]: For 16407/16407 co-relation queries the response was YES. [2022-12-06 07:48:19,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15776 conditions, 3362 events. 2395/3362 cut-off events. For 16407/16407 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13707 event pairs, 365 based on Foata normal form. 146/3508 useless extension candidates. Maximal degree in co-relation 9101. Up to 1555 conditions per place. [2022-12-06 07:48:19,595 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 91 selfloop transitions, 15 changer transitions 0/106 dead transitions. [2022-12-06 07:48:19,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 106 transitions, 998 flow [2022-12-06 07:48:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-06 07:48:19,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-06 07:48:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2022-12-06 07:48:19,597 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.64 [2022-12-06 07:48:19,597 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 386 flow. Second operand 4 states and 64 transitions. [2022-12-06 07:48:19,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 106 transitions, 998 flow [2022-12-06 07:48:19,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 106 transitions, 998 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-06 07:48:19,607 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 580 flow [2022-12-06 07:48:19,607 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=580, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2022-12-06 07:48:19,607 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2022-12-06 07:48:19,607 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:19,608 INFO L89 Accepts]: Start accepts. Operand has 63 places, 60 transitions, 580 flow [2022-12-06 07:48:19,609 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:19,609 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:19,609 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 60 transitions, 580 flow [2022-12-06 07:48:19,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 60 transitions, 580 flow [2022-12-06 07:48:19,646 INFO L130 PetriNetUnfolder]: 209/486 cut-off events. [2022-12-06 07:48:19,646 INFO L131 PetriNetUnfolder]: For 1825/1912 co-relation queries the response was YES. [2022-12-06 07:48:19,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 486 events. 209/486 cut-off events. For 1825/1912 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2599 event pairs, 29 based on Foata normal form. 7/475 useless extension candidates. Maximal degree in co-relation 1842. Up to 240 conditions per place. [2022-12-06 07:48:19,653 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 60 transitions, 580 flow [2022-12-06 07:48:19,653 INFO L188 LiptonReduction]: Number of co-enabled transitions 482 [2022-12-06 07:48:19,654 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:48:19,654 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 47 [2022-12-06 07:48:19,655 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 580 flow [2022-12-06 07:48:19,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-12-06 07:48:19,655 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:19,655 INFO L213 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] [2022-12-06 07:48:19,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-06 07:48:19,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:19,860 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:19,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:19,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1215467448, now seen corresponding path program 2 times [2022-12-06 07:48:19,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:19,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072699572] [2022-12-06 07:48:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:19,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:48:19,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:19,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072699572] [2022-12-06 07:48:19,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072699572] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 07:48:19,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 07:48:19,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 07:48:19,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553831062] [2022-12-06 07:48:19,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:48:19,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-06 07:48:19,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:19,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-06 07:48:19,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-06 07:48:19,984 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-06 07:48:19,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 580 flow. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-12-06 07:48:19,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:19,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-06 07:48:19,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:20,314 INFO L130 PetriNetUnfolder]: 2261/3130 cut-off events. [2022-12-06 07:48:20,314 INFO L131 PetriNetUnfolder]: For 19521/19521 co-relation queries the response was YES. [2022-12-06 07:48:20,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15933 conditions, 3130 events. 2261/3130 cut-off events. For 19521/19521 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11957 event pairs, 756 based on Foata normal form. 14/3144 useless extension candidates. Maximal degree in co-relation 9549. Up to 3013 conditions per place. [2022-12-06 07:48:20,340 INFO L137 encePairwiseOnDemand]: 21/25 looper letters, 60 selfloop transitions, 8 changer transitions 7/75 dead transitions. [2022-12-06 07:48:20,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 75 transitions, 811 flow [2022-12-06 07:48:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-06 07:48:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-06 07:48:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2022-12-06 07:48:20,341 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.44 [2022-12-06 07:48:20,341 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 580 flow. Second operand 4 states and 44 transitions. [2022-12-06 07:48:20,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 75 transitions, 811 flow [2022-12-06 07:48:20,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 811 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-06 07:48:20,351 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 580 flow [2022-12-06 07:48:20,352 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=580, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2022-12-06 07:48:20,352 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2022-12-06 07:48:20,352 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:20,352 INFO L89 Accepts]: Start accepts. Operand has 67 places, 57 transitions, 580 flow [2022-12-06 07:48:20,353 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:20,353 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:20,353 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 57 transitions, 580 flow [2022-12-06 07:48:20,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 57 transitions, 580 flow [2022-12-06 07:48:20,384 INFO L130 PetriNetUnfolder]: 186/401 cut-off events. [2022-12-06 07:48:20,384 INFO L131 PetriNetUnfolder]: For 1626/1704 co-relation queries the response was YES. [2022-12-06 07:48:20,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1760 conditions, 401 events. 186/401 cut-off events. For 1626/1704 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1897 event pairs, 25 based on Foata normal form. 7/394 useless extension candidates. Maximal degree in co-relation 1621. Up to 215 conditions per place. [2022-12-06 07:48:20,391 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 57 transitions, 580 flow [2022-12-06 07:48:20,391 INFO L188 LiptonReduction]: Number of co-enabled transitions 442 [2022-12-06 07:48:20,392 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:48:20,392 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 40 [2022-12-06 07:48:20,392 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 580 flow [2022-12-06 07:48:20,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-12-06 07:48:20,393 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:20,393 INFO L213 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] [2022-12-06 07:48:20,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-06 07:48:20,393 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:20,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1986419809, now seen corresponding path program 1 times [2022-12-06 07:48:20,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:20,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31371504] [2022-12-06 07:48:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:20,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:20,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:20,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31371504] [2022-12-06 07:48:20,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31371504] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:48:20,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525987205] [2022-12-06 07:48:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:20,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:20,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:48:20,501 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) [2022-12-06 07:48:20,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-06 07:48:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:20,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-06 07:48:20,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:48:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:20,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:48:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 07:48:20,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525987205] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:48:20,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:48:20,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-12-06 07:48:20,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489365304] [2022-12-06 07:48:20,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:48:20,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-06 07:48:20,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:20,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-06 07:48:20,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-06 07:48:20,707 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-06 07:48:20,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 580 flow. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-12-06 07:48:20,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:20,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-06 07:48:20,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:21,431 INFO L130 PetriNetUnfolder]: 4762/6785 cut-off events. [2022-12-06 07:48:21,432 INFO L131 PetriNetUnfolder]: For 46784/46784 co-relation queries the response was YES. [2022-12-06 07:48:21,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34704 conditions, 6785 events. 4762/6785 cut-off events. For 46784/46784 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 32637 event pairs, 1256 based on Foata normal form. 634/7419 useless extension candidates. Maximal degree in co-relation 21618. Up to 3473 conditions per place. [2022-12-06 07:48:21,557 INFO L137 encePairwiseOnDemand]: 19/25 looper letters, 105 selfloop transitions, 38 changer transitions 3/146 dead transitions. [2022-12-06 07:48:21,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 146 transitions, 1688 flow [2022-12-06 07:48:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-06 07:48:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-06 07:48:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2022-12-06 07:48:21,558 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.71 [2022-12-06 07:48:21,559 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 580 flow. Second operand 4 states and 71 transitions. [2022-12-06 07:48:21,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 146 transitions, 1688 flow [2022-12-06 07:48:21,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 146 transitions, 1670 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-06 07:48:21,583 INFO L231 Difference]: Finished difference. Result has 70 places, 92 transitions, 1210 flow [2022-12-06 07:48:21,584 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1210, PETRI_PLACES=70, PETRI_TRANSITIONS=92} [2022-12-06 07:48:21,584 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 36 predicate places. [2022-12-06 07:48:21,584 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:21,584 INFO L89 Accepts]: Start accepts. Operand has 70 places, 92 transitions, 1210 flow [2022-12-06 07:48:21,587 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:21,587 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:21,587 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 92 transitions, 1210 flow [2022-12-06 07:48:21,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 92 transitions, 1210 flow [2022-12-06 07:48:21,658 INFO L130 PetriNetUnfolder]: 347/846 cut-off events. [2022-12-06 07:48:21,658 INFO L131 PetriNetUnfolder]: For 5490/6161 co-relation queries the response was YES. [2022-12-06 07:48:21,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4326 conditions, 846 events. 347/846 cut-off events. For 5490/6161 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5504 event pairs, 41 based on Foata normal form. 20/825 useless extension candidates. Maximal degree in co-relation 4031. Up to 411 conditions per place. [2022-12-06 07:48:21,676 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 92 transitions, 1210 flow [2022-12-06 07:48:21,676 INFO L188 LiptonReduction]: Number of co-enabled transitions 830 [2022-12-06 07:48:21,677 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [425] L67-->L67: Formula: (and (= (+ v_~counter~0_92 1) v_~counter~0_91) (< v_~j1~0_23 v_~M1~0_14) (= v_~j1~0_22 (+ v_~j1~0_23 1))) InVars {~counter~0=v_~counter~0_92, ~j1~0=v_~j1~0_23, ~M1~0=v_~M1~0_14} OutVars{~counter~0=v_~counter~0_91, ~j1~0=v_~j1~0_22, thread3Thread1of1ForFork3_#t~post6=|v_thread3Thread1of1ForFork3_#t~post6_5|, ~M1~0=v_~M1~0_14, thread3Thread1of1ForFork3_#t~post5=|v_thread3Thread1of1ForFork3_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, ~j1~0, thread3Thread1of1ForFork3_#t~post6, thread3Thread1of1ForFork3_#t~post5] and [438] L44-->L44: Formula: (and (= v_~i1~0_26 (+ v_~i1~0_27 1)) (< v_~i1~0_27 v_~N1~0_12) (= (+ v_~counter~0_96 1) v_~counter~0_95)) InVars {~counter~0=v_~counter~0_96, ~i1~0=v_~i1~0_27, ~N1~0=v_~N1~0_12} OutVars{~counter~0=v_~counter~0_95, thread1Thread1of1ForFork0_#t~post1=|v_thread1Thread1of1ForFork0_#t~post1_5|, thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_5|, ~i1~0=v_~i1~0_26, ~N1~0=v_~N1~0_12} AuxVars[] AssignedVars[~counter~0, thread1Thread1of1ForFork0_#t~post1, thread1Thread1of1ForFork0_#t~post2, ~i1~0] [2022-12-06 07:48:21,713 INFO L203 LiptonReduction]: Total number of compositions: 1 [2022-12-06 07:48:21,714 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 130 [2022-12-06 07:48:21,714 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 92 transitions, 1220 flow [2022-12-06 07:48:21,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-12-06 07:48:21,715 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:21,715 INFO L213 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] [2022-12-06 07:48:21,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-06 07:48:21,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:21,920 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:21,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1754591801, now seen corresponding path program 2 times [2022-12-06 07:48:21,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:21,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912592924] [2022-12-06 07:48:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:21,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:48:22,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:22,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912592924] [2022-12-06 07:48:22,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912592924] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:48:22,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753800835] [2022-12-06 07:48:22,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-06 07:48:22,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:22,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:48:22,059 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) [2022-12-06 07:48:22,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-06 07:48:22,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-06 07:48:22,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 07:48:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-06 07:48:22,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:48:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:48:22,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:48:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:48:22,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753800835] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:48:22,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:48:22,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-12-06 07:48:22,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872255503] [2022-12-06 07:48:22,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:48:22,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-06 07:48:22,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:22,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-06 07:48:22,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-06 07:48:22,269 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-06 07:48:22,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 92 transitions, 1220 flow. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-12-06 07:48:22,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:22,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-06 07:48:22,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:23,597 INFO L130 PetriNetUnfolder]: 9386/13396 cut-off events. [2022-12-06 07:48:23,597 INFO L131 PetriNetUnfolder]: For 129827/129827 co-relation queries the response was YES. [2022-12-06 07:48:23,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77412 conditions, 13396 events. 9386/13396 cut-off events. For 129827/129827 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 73043 event pairs, 1920 based on Foata normal form. 691/14087 useless extension candidates. Maximal degree in co-relation 28529. Up to 5627 conditions per place. [2022-12-06 07:48:23,723 INFO L137 encePairwiseOnDemand]: 19/26 looper letters, 134 selfloop transitions, 95 changer transitions 3/232 dead transitions. [2022-12-06 07:48:23,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 232 transitions, 3124 flow [2022-12-06 07:48:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-06 07:48:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-06 07:48:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2022-12-06 07:48:23,725 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.7307692307692307 [2022-12-06 07:48:23,725 INFO L175 Difference]: Start difference. First operand has 70 places, 92 transitions, 1220 flow. Second operand 5 states and 95 transitions. [2022-12-06 07:48:23,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 232 transitions, 3124 flow [2022-12-06 07:48:23,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 232 transitions, 3074 flow, removed 25 selfloop flow, removed 0 redundant places. [2022-12-06 07:48:23,766 INFO L231 Difference]: Finished difference. Result has 76 places, 149 transitions, 2353 flow [2022-12-06 07:48:23,767 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2353, PETRI_PLACES=76, PETRI_TRANSITIONS=149} [2022-12-06 07:48:23,767 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 42 predicate places. [2022-12-06 07:48:23,768 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:23,768 INFO L89 Accepts]: Start accepts. Operand has 76 places, 149 transitions, 2353 flow [2022-12-06 07:48:23,769 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:23,769 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:23,769 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 149 transitions, 2353 flow [2022-12-06 07:48:23,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 149 transitions, 2353 flow [2022-12-06 07:48:23,928 INFO L130 PetriNetUnfolder]: 672/1682 cut-off events. [2022-12-06 07:48:23,928 INFO L131 PetriNetUnfolder]: For 14435/16502 co-relation queries the response was YES. [2022-12-06 07:48:23,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9388 conditions, 1682 events. 672/1682 cut-off events. For 14435/16502 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 13392 event pairs, 58 based on Foata normal form. 42/1644 useless extension candidates. Maximal degree in co-relation 8802. Up to 678 conditions per place. [2022-12-06 07:48:23,964 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 149 transitions, 2353 flow [2022-12-06 07:48:23,964 INFO L188 LiptonReduction]: Number of co-enabled transitions 1472 [2022-12-06 07:48:23,966 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:48:23,967 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 200 [2022-12-06 07:48:23,967 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 149 transitions, 2353 flow [2022-12-06 07:48:23,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-12-06 07:48:23,967 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:23,967 INFO L213 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] [2022-12-06 07:48:23,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-06 07:48:24,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-06 07:48:24,174 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:24,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:24,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1506199145, now seen corresponding path program 1 times [2022-12-06 07:48:24,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:24,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868607548] [2022-12-06 07:48:24,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:24,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-06 07:48:24,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:24,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868607548] [2022-12-06 07:48:24,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868607548] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:48:24,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053286295] [2022-12-06 07:48:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:24,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:24,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:48:24,309 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 07:48:24,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-06 07:48:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:24,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-06 07:48:24,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:48:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:48:24,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:48:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:48:24,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053286295] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:48:24,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:48:24,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2022-12-06 07:48:24,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111316299] [2022-12-06 07:48:24,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:48:24,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-06 07:48:24,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:24,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-06 07:48:24,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-06 07:48:24,663 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 26 [2022-12-06 07:48:24,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 149 transitions, 2353 flow. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 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) [2022-12-06 07:48:24,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:24,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 26 [2022-12-06 07:48:24,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:29,294 INFO L130 PetriNetUnfolder]: 26901/38087 cut-off events. [2022-12-06 07:48:29,294 INFO L131 PetriNetUnfolder]: For 440308/440308 co-relation queries the response was YES. [2022-12-06 07:48:29,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244784 conditions, 38087 events. 26901/38087 cut-off events. For 440308/440308 co-relation queries the response was YES. Maximal size of possible extension queue 1556. Compared 237026 event pairs, 3476 based on Foata normal form. 4226/42313 useless extension candidates. Maximal degree in co-relation 114305. Up to 14773 conditions per place. [2022-12-06 07:48:29,604 INFO L137 encePairwiseOnDemand]: 18/26 looper letters, 891 selfloop transitions, 418 changer transitions 20/1329 dead transitions. [2022-12-06 07:48:29,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 1329 transitions, 20583 flow [2022-12-06 07:48:29,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-06 07:48:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-06 07:48:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 469 transitions. [2022-12-06 07:48:29,608 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4875259875259875 [2022-12-06 07:48:29,608 INFO L175 Difference]: Start difference. First operand has 76 places, 149 transitions, 2353 flow. Second operand 37 states and 469 transitions. [2022-12-06 07:48:29,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 1329 transitions, 20583 flow [2022-12-06 07:48:29,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 1329 transitions, 19255 flow, removed 664 selfloop flow, removed 0 redundant places. [2022-12-06 07:48:29,961 INFO L231 Difference]: Finished difference. Result has 144 places, 581 transitions, 10668 flow [2022-12-06 07:48:29,962 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2191, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10668, PETRI_PLACES=144, PETRI_TRANSITIONS=581} [2022-12-06 07:48:29,962 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 110 predicate places. [2022-12-06 07:48:29,962 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:29,962 INFO L89 Accepts]: Start accepts. Operand has 144 places, 581 transitions, 10668 flow [2022-12-06 07:48:29,969 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:29,969 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:29,969 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 581 transitions, 10668 flow [2022-12-06 07:48:29,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 581 transitions, 10668 flow [2022-12-06 07:48:30,703 INFO L130 PetriNetUnfolder]: 2454/5352 cut-off events. [2022-12-06 07:48:30,703 INFO L131 PetriNetUnfolder]: For 171085/174806 co-relation queries the response was YES. [2022-12-06 07:48:30,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47027 conditions, 5352 events. 2454/5352 cut-off events. For 171085/174806 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 47797 event pairs, 172 based on Foata normal form. 115/5288 useless extension candidates. Maximal degree in co-relation 45733. Up to 1569 conditions per place. [2022-12-06 07:48:30,991 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 581 transitions, 10668 flow [2022-12-06 07:48:30,991 INFO L188 LiptonReduction]: Number of co-enabled transitions 5128 [2022-12-06 07:48:30,995 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [438] L44-->L44: Formula: (and (= v_~i1~0_26 (+ v_~i1~0_27 1)) (< v_~i1~0_27 v_~N1~0_12) (= (+ v_~counter~0_96 1) v_~counter~0_95)) InVars {~counter~0=v_~counter~0_96, ~i1~0=v_~i1~0_27, ~N1~0=v_~N1~0_12} OutVars{~counter~0=v_~counter~0_95, thread1Thread1of1ForFork0_#t~post1=|v_thread1Thread1of1ForFork0_#t~post1_5|, thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_5|, ~i1~0=v_~i1~0_26, ~N1~0=v_~N1~0_12} AuxVars[] AssignedVars[~counter~0, thread1Thread1of1ForFork0_#t~post1, thread1Thread1of1ForFork0_#t~post2, ~i1~0] and [425] L67-->L67: Formula: (and (= (+ v_~counter~0_92 1) v_~counter~0_91) (< v_~j1~0_23 v_~M1~0_14) (= v_~j1~0_22 (+ v_~j1~0_23 1))) InVars {~counter~0=v_~counter~0_92, ~j1~0=v_~j1~0_23, ~M1~0=v_~M1~0_14} OutVars{~counter~0=v_~counter~0_91, ~j1~0=v_~j1~0_22, thread3Thread1of1ForFork3_#t~post6=|v_thread3Thread1of1ForFork3_#t~post6_5|, ~M1~0=v_~M1~0_14, thread3Thread1of1ForFork3_#t~post5=|v_thread3Thread1of1ForFork3_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, ~j1~0, thread3Thread1of1ForFork3_#t~post6, thread3Thread1of1ForFork3_#t~post5] [2022-12-06 07:48:31,037 INFO L203 LiptonReduction]: Total number of compositions: 1 [2022-12-06 07:48:31,038 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 1076 [2022-12-06 07:48:31,038 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 581 transitions, 10692 flow [2022-12-06 07:48:31,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 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) [2022-12-06 07:48:31,038 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:31,038 INFO L213 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] [2022-12-06 07:48:31,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-06 07:48:31,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:31,244 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:31,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:31,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1348109670, now seen corresponding path program 1 times [2022-12-06 07:48:31,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:31,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833039668] [2022-12-06 07:48:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:31,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:48:31,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:31,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833039668] [2022-12-06 07:48:31,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833039668] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:48:31,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832065371] [2022-12-06 07:48:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:31,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:31,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:48:31,410 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 07:48:31,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-06 07:48:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:31,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-06 07:48:31,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:48:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-06 07:48:31,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:48:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-06 07:48:31,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832065371] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-06 07:48:31,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-06 07:48:31,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 10 [2022-12-06 07:48:31,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901469120] [2022-12-06 07:48:31,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 07:48:31,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-06 07:48:31,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:31,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-06 07:48:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-06 07:48:31,682 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 27 [2022-12-06 07:48:31,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 581 transitions, 10692 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-12-06 07:48:31,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:31,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 27 [2022-12-06 07:48:31,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:39,141 INFO L130 PetriNetUnfolder]: 28650/40500 cut-off events. [2022-12-06 07:48:39,141 INFO L131 PetriNetUnfolder]: For 1663943/1663943 co-relation queries the response was YES. [2022-12-06 07:48:39,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389849 conditions, 40500 events. 28650/40500 cut-off events. For 1663943/1663943 co-relation queries the response was YES. Maximal size of possible extension queue 1644. Compared 254217 event pairs, 4973 based on Foata normal form. 580/41080 useless extension candidates. Maximal degree in co-relation 365043. Up to 21225 conditions per place. [2022-12-06 07:48:39,814 INFO L137 encePairwiseOnDemand]: 20/27 looper letters, 731 selfloop transitions, 69 changer transitions 52/852 dead transitions. [2022-12-06 07:48:39,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 852 transitions, 17475 flow [2022-12-06 07:48:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-06 07:48:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-06 07:48:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2022-12-06 07:48:39,815 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2022-12-06 07:48:39,816 INFO L175 Difference]: Start difference. First operand has 144 places, 581 transitions, 10692 flow. Second operand 5 states and 67 transitions. [2022-12-06 07:48:39,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 852 transitions, 17475 flow [2022-12-06 07:48:43,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 852 transitions, 14741 flow, removed 1177 selfloop flow, removed 5 redundant places. [2022-12-06 07:48:43,852 INFO L231 Difference]: Finished difference. Result has 145 places, 599 transitions, 9611 flow [2022-12-06 07:48:43,852 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8947, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9611, PETRI_PLACES=145, PETRI_TRANSITIONS=599} [2022-12-06 07:48:43,852 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 111 predicate places. [2022-12-06 07:48:43,852 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:48:43,852 INFO L89 Accepts]: Start accepts. Operand has 145 places, 599 transitions, 9611 flow [2022-12-06 07:48:43,856 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:48:43,856 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:48:43,856 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 599 transitions, 9611 flow [2022-12-06 07:48:43,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 599 transitions, 9611 flow [2022-12-06 07:48:44,517 INFO L130 PetriNetUnfolder]: 2638/5621 cut-off events. [2022-12-06 07:48:44,518 INFO L131 PetriNetUnfolder]: For 187595/191053 co-relation queries the response was YES. [2022-12-06 07:48:44,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48492 conditions, 5621 events. 2638/5621 cut-off events. For 187595/191053 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 49690 event pairs, 197 based on Foata normal form. 82/5495 useless extension candidates. Maximal degree in co-relation 47186. Up to 1594 conditions per place. [2022-12-06 07:48:44,640 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 599 transitions, 9611 flow [2022-12-06 07:48:44,640 INFO L188 LiptonReduction]: Number of co-enabled transitions 5324 [2022-12-06 07:48:44,646 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 07:48:44,647 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 795 [2022-12-06 07:48:44,647 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 599 transitions, 9611 flow [2022-12-06 07:48:44,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2022-12-06 07:48:44,647 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:48:44,647 INFO L213 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] [2022-12-06 07:48:44,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-06 07:48:44,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:44,848 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:48:44,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:48:44,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1884517835, now seen corresponding path program 2 times [2022-12-06 07:48:44,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:48:44,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020633046] [2022-12-06 07:48:44,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:48:44,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:48:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:48:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:48:45,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:48:45,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020633046] [2022-12-06 07:48:45,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020633046] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:48:45,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452239168] [2022-12-06 07:48:45,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-06 07:48:45,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:48:45,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:48:45,007 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 07:48:45,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-06 07:48:45,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-06 07:48:45,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 07:48:45,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-06 07:48:45,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:48:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:48:45,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:48:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:48:45,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452239168] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:48:45,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:48:45,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-12-06 07:48:45,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14320406] [2022-12-06 07:48:45,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:48:45,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-06 07:48:45,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:48:45,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-06 07:48:45,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-06 07:48:45,296 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 27 [2022-12-06 07:48:45,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 599 transitions, 9611 flow. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 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) [2022-12-06 07:48:45,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:48:45,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 27 [2022-12-06 07:48:45,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:48:59,523 INFO L130 PetriNetUnfolder]: 48374/69885 cut-off events. [2022-12-06 07:48:59,523 INFO L131 PetriNetUnfolder]: For 3524186/3524186 co-relation queries the response was YES. [2022-12-06 07:49:00,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655376 conditions, 69885 events. 48374/69885 cut-off events. For 3524186/3524186 co-relation queries the response was YES. Maximal size of possible extension queue 2948. Compared 493160 event pairs, 4806 based on Foata normal form. 4620/74505 useless extension candidates. Maximal degree in co-relation 597612. Up to 17731 conditions per place. [2022-12-06 07:49:00,549 INFO L137 encePairwiseOnDemand]: 18/27 looper letters, 920 selfloop transitions, 787 changer transitions 56/1763 dead transitions. [2022-12-06 07:49:00,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 1763 transitions, 33588 flow [2022-12-06 07:49:00,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-06 07:49:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-06 07:49:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 450 transitions. [2022-12-06 07:49:00,552 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5376344086021505 [2022-12-06 07:49:00,552 INFO L175 Difference]: Start difference. First operand has 145 places, 599 transitions, 9611 flow. Second operand 31 states and 450 transitions. [2022-12-06 07:49:00,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 1763 transitions, 33588 flow [2022-12-06 07:49:08,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 1763 transitions, 32932 flow, removed 244 selfloop flow, removed 3 redundant places. [2022-12-06 07:49:08,911 INFO L231 Difference]: Finished difference. Result has 193 places, 1017 transitions, 21103 flow [2022-12-06 07:49:08,911 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8828, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=21103, PETRI_PLACES=193, PETRI_TRANSITIONS=1017} [2022-12-06 07:49:08,912 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 159 predicate places. [2022-12-06 07:49:08,912 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:49:08,912 INFO L89 Accepts]: Start accepts. Operand has 193 places, 1017 transitions, 21103 flow [2022-12-06 07:49:08,919 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:49:08,919 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:49:08,919 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 1017 transitions, 21103 flow [2022-12-06 07:49:08,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 1017 transitions, 21103 flow [2022-12-06 07:49:10,816 INFO L130 PetriNetUnfolder]: 4186/9998 cut-off events. [2022-12-06 07:49:10,816 INFO L131 PetriNetUnfolder]: For 544263/549281 co-relation queries the response was YES. [2022-12-06 07:49:10,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99926 conditions, 9998 events. 4186/9998 cut-off events. For 544263/549281 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 106148 event pairs, 271 based on Foata normal form. 76/9852 useless extension candidates. Maximal degree in co-relation 97036. Up to 2802 conditions per place. [2022-12-06 07:49:11,026 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 1017 transitions, 21103 flow [2022-12-06 07:49:11,026 INFO L188 LiptonReduction]: Number of co-enabled transitions 9230 [2022-12-06 07:49:11,042 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [477] L56-->L56: Formula: (and (= |v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_5| |v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_5|) (= v_~counter~0_110 (+ v_~counter~0_109 1)) (= |v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_5| (ite (< 0 v_~counter~0_110) 1 0)) (< v_~i2~0_37 v_~N2~0_40) (not (= 0 |v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_5|)) (= (+ v_~i2~0_37 1) v_~i2~0_36)) InVars {~counter~0=v_~counter~0_110, ~i2~0=v_~i2~0_37, ~N2~0=v_~N2~0_40} OutVars{~counter~0=v_~counter~0_109, thread2Thread1of1ForFork2_#t~post4#1=|v_thread2Thread1of1ForFork2_#t~post4#1_5|, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_5|, thread2Thread1of1ForFork2_#t~post3#1=|v_thread2Thread1of1ForFork2_#t~post3#1_5|, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_5|, ~i2~0=v_~i2~0_36, ~N2~0=v_~N2~0_40} AuxVars[] AssignedVars[~counter~0, thread2Thread1of1ForFork2_#t~post4#1, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1, thread2Thread1of1ForFork2_#t~post3#1, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1, ~i2~0] and [438] L44-->L44: Formula: (and (= v_~i1~0_26 (+ v_~i1~0_27 1)) (< v_~i1~0_27 v_~N1~0_12) (= (+ v_~counter~0_96 1) v_~counter~0_95)) InVars {~counter~0=v_~counter~0_96, ~i1~0=v_~i1~0_27, ~N1~0=v_~N1~0_12} OutVars{~counter~0=v_~counter~0_95, thread1Thread1of1ForFork0_#t~post1=|v_thread1Thread1of1ForFork0_#t~post1_5|, thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_5|, ~i1~0=v_~i1~0_26, ~N1~0=v_~N1~0_12} AuxVars[] AssignedVars[~counter~0, thread1Thread1of1ForFork0_#t~post1, thread1Thread1of1ForFork0_#t~post2, ~i1~0] [2022-12-06 07:49:11,189 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [494] L56-->thread2EXIT: Formula: (and (= |v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_23| |v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_23|) (not (< v_~i2~0_58 v_~N2~0_54)) (not (= |v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_23| 0)) (= v_~i2~0_58 (+ v_~i2~0_59 1)) (= v_~counter~0_178 (+ v_~counter~0_177 1)) (= |v_thread2Thread1of1ForFork2_#res#1.offset_29| 0) (= |v_thread2Thread1of1ForFork2_#res#1.base_29| 0) (= (ite (< 0 v_~counter~0_178) 1 0) |v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_23|) (< v_~i2~0_59 v_~N2~0_54)) InVars {~counter~0=v_~counter~0_178, ~i2~0=v_~i2~0_59, ~N2~0=v_~N2~0_54} OutVars{~counter~0=v_~counter~0_177, thread2Thread1of1ForFork2_#t~post4#1=|v_thread2Thread1of1ForFork2_#t~post4#1_23|, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_23|, thread2Thread1of1ForFork2_#res#1.offset=|v_thread2Thread1of1ForFork2_#res#1.offset_29|, thread2Thread1of1ForFork2_#t~post3#1=|v_thread2Thread1of1ForFork2_#t~post3#1_23|, ~i2~0=v_~i2~0_58, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_23|, ~N2~0=v_~N2~0_54, thread2Thread1of1ForFork2_#res#1.base=|v_thread2Thread1of1ForFork2_#res#1.base_29|} AuxVars[] AssignedVars[~counter~0, thread2Thread1of1ForFork2_#t~post4#1, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1, thread2Thread1of1ForFork2_#res#1.offset, thread2Thread1of1ForFork2_#t~post3#1, ~i2~0, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1, thread2Thread1of1ForFork2_#res#1.base] and [438] L44-->L44: Formula: (and (= v_~i1~0_26 (+ v_~i1~0_27 1)) (< v_~i1~0_27 v_~N1~0_12) (= (+ v_~counter~0_96 1) v_~counter~0_95)) InVars {~counter~0=v_~counter~0_96, ~i1~0=v_~i1~0_27, ~N1~0=v_~N1~0_12} OutVars{~counter~0=v_~counter~0_95, thread1Thread1of1ForFork0_#t~post1=|v_thread1Thread1of1ForFork0_#t~post1_5|, thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_5|, ~i1~0=v_~i1~0_26, ~N1~0=v_~N1~0_12} AuxVars[] AssignedVars[~counter~0, thread1Thread1of1ForFork0_#t~post1, thread1Thread1of1ForFork0_#t~post2, ~i1~0] [2022-12-06 07:49:11,301 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [438] L44-->L44: Formula: (and (= v_~i1~0_26 (+ v_~i1~0_27 1)) (< v_~i1~0_27 v_~N1~0_12) (= (+ v_~counter~0_96 1) v_~counter~0_95)) InVars {~counter~0=v_~counter~0_96, ~i1~0=v_~i1~0_27, ~N1~0=v_~N1~0_12} OutVars{~counter~0=v_~counter~0_95, thread1Thread1of1ForFork0_#t~post1=|v_thread1Thread1of1ForFork0_#t~post1_5|, thread1Thread1of1ForFork0_#t~post2=|v_thread1Thread1of1ForFork0_#t~post2_5|, ~i1~0=v_~i1~0_26, ~N1~0=v_~N1~0_12} AuxVars[] AssignedVars[~counter~0, thread1Thread1of1ForFork0_#t~post1, thread1Thread1of1ForFork0_#t~post2, ~i1~0] and [477] L56-->L56: Formula: (and (= |v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_5| |v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_5|) (= v_~counter~0_110 (+ v_~counter~0_109 1)) (= |v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_5| (ite (< 0 v_~counter~0_110) 1 0)) (< v_~i2~0_37 v_~N2~0_40) (not (= 0 |v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_5|)) (= (+ v_~i2~0_37 1) v_~i2~0_36)) InVars {~counter~0=v_~counter~0_110, ~i2~0=v_~i2~0_37, ~N2~0=v_~N2~0_40} OutVars{~counter~0=v_~counter~0_109, thread2Thread1of1ForFork2_#t~post4#1=|v_thread2Thread1of1ForFork2_#t~post4#1_5|, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_5|, thread2Thread1of1ForFork2_#t~post3#1=|v_thread2Thread1of1ForFork2_#t~post3#1_5|, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_5|, ~i2~0=v_~i2~0_36, ~N2~0=v_~N2~0_40} AuxVars[] AssignedVars[~counter~0, thread2Thread1of1ForFork2_#t~post4#1, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1, thread2Thread1of1ForFork2_#t~post3#1, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1, ~i2~0] [2022-12-06 07:49:11,354 INFO L203 LiptonReduction]: Total number of compositions: 3 [2022-12-06 07:49:11,354 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 2442 [2022-12-06 07:49:11,354 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 1017 transitions, 21196 flow [2022-12-06 07:49:11,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 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) [2022-12-06 07:49:11,355 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:49:11,355 INFO L213 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] [2022-12-06 07:49:11,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-06 07:49:11,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-06 07:49:11,556 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:49:11,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:49:11,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2013724574, now seen corresponding path program 2 times [2022-12-06 07:49:11,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:49:11,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504138991] [2022-12-06 07:49:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:49:11,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:49:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:49:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:49:11,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:49:11,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504138991] [2022-12-06 07:49:11,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504138991] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:49:11,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272341036] [2022-12-06 07:49:11,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-06 07:49:11,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:49:11,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:49:11,799 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 07:49:11,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-06 07:49:11,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-06 07:49:11,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 07:49:11,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-06 07:49:11,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:49:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-06 07:49:11,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:49:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-06 07:49:12,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272341036] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:49:12,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:49:12,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-12-06 07:49:12,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668397712] [2022-12-06 07:49:12,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:49:12,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-06 07:49:12,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:49:12,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-06 07:49:12,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-06 07:49:12,061 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 31 [2022-12-06 07:49:12,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 1017 transitions, 21196 flow. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 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) [2022-12-06 07:49:12,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:49:12,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 31 [2022-12-06 07:49:12,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 07:49:43,582 INFO L130 PetriNetUnfolder]: 68144/99331 cut-off events. [2022-12-06 07:49:43,583 INFO L131 PetriNetUnfolder]: For 7762996/7762996 co-relation queries the response was YES. [2022-12-06 07:49:45,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1117316 conditions, 99331 events. 68144/99331 cut-off events. For 7762996/7762996 co-relation queries the response was YES. Maximal size of possible extension queue 4207. Compared 745848 event pairs, 10276 based on Foata normal form. 2202/101533 useless extension candidates. Maximal degree in co-relation 1070701. Up to 48227 conditions per place. [2022-12-06 07:49:45,601 INFO L137 encePairwiseOnDemand]: 18/31 looper letters, 1420 selfloop transitions, 604 changer transitions 142/2166 dead transitions. [2022-12-06 07:49:45,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 2166 transitions, 47703 flow [2022-12-06 07:49:45,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-06 07:49:45,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-06 07:49:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 257 transitions. [2022-12-06 07:49:45,604 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.39477726574500765 [2022-12-06 07:49:45,604 INFO L175 Difference]: Start difference. First operand has 193 places, 1017 transitions, 21196 flow. Second operand 21 states and 257 transitions. [2022-12-06 07:49:45,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 2166 transitions, 47703 flow [2022-12-06 07:51:01,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 2166 transitions, 43591 flow, removed 1732 selfloop flow, removed 4 redundant places. [2022-12-06 07:51:01,781 INFO L231 Difference]: Finished difference. Result has 223 places, 1449 transitions, 30646 flow [2022-12-06 07:51:01,782 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=18567, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=663, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=30646, PETRI_PLACES=223, PETRI_TRANSITIONS=1449} [2022-12-06 07:51:01,782 INFO L294 CegarLoopForPetriNet]: 34 programPoint places, 189 predicate places. [2022-12-06 07:51:01,782 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 07:51:01,782 INFO L89 Accepts]: Start accepts. Operand has 223 places, 1449 transitions, 30646 flow [2022-12-06 07:51:01,793 INFO L95 Accepts]: Finished accepts. [2022-12-06 07:51:01,793 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 07:51:01,794 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 1449 transitions, 30646 flow [2022-12-06 07:51:01,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 222 places, 1449 transitions, 30646 flow [2022-12-06 07:51:04,565 INFO L130 PetriNetUnfolder]: 5782/13753 cut-off events. [2022-12-06 07:51:04,565 INFO L131 PetriNetUnfolder]: For 849837/860488 co-relation queries the response was YES. [2022-12-06 07:51:04,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141117 conditions, 13753 events. 5782/13753 cut-off events. For 849837/860488 co-relation queries the response was YES. Maximal size of possible extension queue 1439. Compared 152219 event pairs, 395 based on Foata normal form. 168/13636 useless extension candidates. Maximal degree in co-relation 137369. Up to 3938 conditions per place. [2022-12-06 07:51:04,919 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 222 places, 1449 transitions, 30646 flow [2022-12-06 07:51:04,919 INFO L188 LiptonReduction]: Number of co-enabled transitions 11940 [2022-12-06 07:51:04,925 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [425] L67-->L67: Formula: (and (= (+ v_~counter~0_92 1) v_~counter~0_91) (< v_~j1~0_23 v_~M1~0_14) (= v_~j1~0_22 (+ v_~j1~0_23 1))) InVars {~counter~0=v_~counter~0_92, ~j1~0=v_~j1~0_23, ~M1~0=v_~M1~0_14} OutVars{~counter~0=v_~counter~0_91, ~j1~0=v_~j1~0_22, thread3Thread1of1ForFork3_#t~post6=|v_thread3Thread1of1ForFork3_#t~post6_5|, ~M1~0=v_~M1~0_14, thread3Thread1of1ForFork3_#t~post5=|v_thread3Thread1of1ForFork3_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, ~j1~0, thread3Thread1of1ForFork3_#t~post6, thread3Thread1of1ForFork3_#t~post5] and [477] L56-->L56: Formula: (and (= |v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_5| |v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_5|) (= v_~counter~0_110 (+ v_~counter~0_109 1)) (= |v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_5| (ite (< 0 v_~counter~0_110) 1 0)) (< v_~i2~0_37 v_~N2~0_40) (not (= 0 |v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_5|)) (= (+ v_~i2~0_37 1) v_~i2~0_36)) InVars {~counter~0=v_~counter~0_110, ~i2~0=v_~i2~0_37, ~N2~0=v_~N2~0_40} OutVars{~counter~0=v_~counter~0_109, thread2Thread1of1ForFork2_#t~post4#1=|v_thread2Thread1of1ForFork2_#t~post4#1_5|, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_5|, thread2Thread1of1ForFork2_#t~post3#1=|v_thread2Thread1of1ForFork2_#t~post3#1_5|, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_5|, ~i2~0=v_~i2~0_36, ~N2~0=v_~N2~0_40} AuxVars[] AssignedVars[~counter~0, thread2Thread1of1ForFork2_#t~post4#1, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1, thread2Thread1of1ForFork2_#t~post3#1, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1, ~i2~0] [2022-12-06 07:51:05,009 ERROR L112 fgCompositionFactory]: Composing non-subsequent actions: [498] L67-->L56: Formula: (and (= |v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_31| |v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_31|) (= v_~j1~0_62 (+ v_~j1~0_63 1)) (= v_~counter~0_203 v_~counter~0_205) (< v_~i2~0_72 v_~N2~0_60) (= (ite (< 0 (+ v_~counter~0_205 1)) 1 0) |v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_31|) (not (= |v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_31| 0)) (< v_~j1~0_63 v_~M1~0_56) (= (+ v_~i2~0_72 1) v_~i2~0_71)) InVars {~counter~0=v_~counter~0_205, ~i2~0=v_~i2~0_72, ~j1~0=v_~j1~0_63, ~M1~0=v_~M1~0_56, ~N2~0=v_~N2~0_60} OutVars{~counter~0=v_~counter~0_203, thread2Thread1of1ForFork2_#t~post4#1=|v_thread2Thread1of1ForFork2_#t~post4#1_31|, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1_31|, thread2Thread1of1ForFork2_#t~post3#1=|v_thread2Thread1of1ForFork2_#t~post3#1_31|, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1=|v_thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_31|, ~i2~0=v_~i2~0_71, ~j1~0=v_~j1~0_62, thread3Thread1of1ForFork3_#t~post6=|v_thread3Thread1of1ForFork3_#t~post6_32|, ~M1~0=v_~M1~0_56, ~N2~0=v_~N2~0_60, thread3Thread1of1ForFork3_#t~post5=|v_thread3Thread1of1ForFork3_#t~post5_32|} AuxVars[] AssignedVars[~counter~0, thread2Thread1of1ForFork2_#t~post4#1, thread2Thread1of1ForFork2_assume_abort_if_not_~cond#1, thread2Thread1of1ForFork2_#t~post3#1, thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond#1, ~i2~0, ~j1~0, thread3Thread1of1ForFork3_#t~post6, thread3Thread1of1ForFork3_#t~post5] and [425] L67-->L67: Formula: (and (= (+ v_~counter~0_92 1) v_~counter~0_91) (< v_~j1~0_23 v_~M1~0_14) (= v_~j1~0_22 (+ v_~j1~0_23 1))) InVars {~counter~0=v_~counter~0_92, ~j1~0=v_~j1~0_23, ~M1~0=v_~M1~0_14} OutVars{~counter~0=v_~counter~0_91, ~j1~0=v_~j1~0_22, thread3Thread1of1ForFork3_#t~post6=|v_thread3Thread1of1ForFork3_#t~post6_5|, ~M1~0=v_~M1~0_14, thread3Thread1of1ForFork3_#t~post5=|v_thread3Thread1of1ForFork3_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, ~j1~0, thread3Thread1of1ForFork3_#t~post6, thread3Thread1of1ForFork3_#t~post5] [2022-12-06 07:51:05,119 INFO L203 LiptonReduction]: Total number of compositions: 3 [2022-12-06 07:51:05,433 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 3651 [2022-12-06 07:51:05,433 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 1449 transitions, 30683 flow [2022-12-06 07:51:05,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 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) [2022-12-06 07:51:05,433 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 07:51:05,433 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 07:51:05,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-06 07:51:05,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-06 07:51:05,634 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-06 07:51:05,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 07:51:05,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1804503064, now seen corresponding path program 1 times [2022-12-06 07:51:05,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 07:51:05,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211593385] [2022-12-06 07:51:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:51:05,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 07:51:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:51:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:51:05,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 07:51:05,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211593385] [2022-12-06 07:51:05,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211593385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 07:51:05,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562865958] [2022-12-06 07:51:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 07:51:05,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 07:51:05,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 07:51:05,763 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-06 07:51:05,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-06 07:51:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 07:51:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-06 07:51:05,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 07:51:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:51:05,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 07:51:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 07:51:06,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562865958] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 07:51:06,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 07:51:06,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-06 07:51:06,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441000513] [2022-12-06 07:51:06,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 07:51:06,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-06 07:51:06,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 07:51:06,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-06 07:51:06,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-06 07:51:06,026 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 34 [2022-12-06 07:51:06,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 1449 transitions, 30683 flow. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 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) [2022-12-06 07:51:06,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 07:51:06,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 34 [2022-12-06 07:51:06,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand