./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:10:50,964 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:10:51,086 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:10:51,097 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:10:51,098 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:10:51,141 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:10:51,142 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:10:51,142 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:10:51,143 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:10:51,149 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:10:51,151 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:10:51,151 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:10:51,152 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:10:51,154 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:10:51,155 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:10:51,155 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:10:51,155 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:10:51,156 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:10:51,156 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:10:51,157 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:10:51,157 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:10:51,158 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:10:51,158 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:10:51,159 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:10:51,159 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:10:51,160 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:10:51,161 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:10:51,161 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:10:51,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:10:51,162 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:10:51,164 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:10:51,164 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:10:51,164 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:10:51,164 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:10:51,165 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:10:51,165 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:10:51,165 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:10:51,165 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:10:51,166 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:10:51,166 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 [2023-11-06 22:10:51,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:10:51,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:10:51,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:10:51,576 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:10:51,577 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:10:51,578 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-11-06 22:10:54,978 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:10:55,212 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:10:55,213 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-11-06 22:10:55,223 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/data/3934dcdce/e989e6e5a59d40dda2b51a9ba2a0fbbc/FLAG9ba53b4b2 [2023-11-06 22:10:55,239 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/data/3934dcdce/e989e6e5a59d40dda2b51a9ba2a0fbbc [2023-11-06 22:10:55,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:10:55,244 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:10:55,246 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:10:55,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:10:55,253 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:10:55,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd66655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55, skipping insertion in model container [2023-11-06 22:10:55,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,283 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:10:55,466 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2023-11-06 22:10:55,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:10:55,483 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:10:55,510 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2023-11-06 22:10:55,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:10:55,521 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:10:55,521 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:10:55,530 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:10:55,530 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55 WrapperNode [2023-11-06 22:10:55,531 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:10:55,532 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:10:55,532 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:10:55,533 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:10:55,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,550 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,578 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 136 [2023-11-06 22:10:55,578 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:10:55,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:10:55,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:10:55,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:10:55,589 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,589 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,593 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,593 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,602 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,608 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,610 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,612 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,621 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:10:55,623 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:10:55,623 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:10:55,623 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:10:55,624 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55" (1/1) ... [2023-11-06 22:10:55,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:10:55,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:55,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:10:55,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:10:55,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:10:55,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:10:55,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:10:55,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:10:55,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:10:55,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:10:55,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:10:55,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:10:55,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:10:55,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:10:55,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:10:55,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:10:55,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:10:55,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:10:55,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:10:55,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:10:55,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:10:55,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:10:55,731 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:10:55,959 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:10:55,961 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:10:56,272 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:10:56,417 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:10:56,417 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:10:56,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:56 BoogieIcfgContainer [2023-11-06 22:10:56,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:10:56,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:10:56,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:10:56,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:10:56,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:10:55" (1/3) ... [2023-11-06 22:10:56,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459ee1a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:56, skipping insertion in model container [2023-11-06 22:10:56,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:10:55" (2/3) ... [2023-11-06 22:10:56,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459ee1a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:10:56, skipping insertion in model container [2023-11-06 22:10:56,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:10:56" (3/3) ... [2023-11-06 22:10:56,433 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2023-11-06 22:10:56,444 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:10:56,459 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:10:56,459 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:10:56,459 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:10:56,548 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:10:56,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 290 flow [2023-11-06 22:10:56,680 INFO L124 PetriNetUnfolderBase]: 10/127 cut-off events. [2023-11-06 22:10:56,680 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:10:56,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 127 events. 10/127 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-11-06 22:10:56,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 131 transitions, 290 flow [2023-11-06 22:10:56,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 114 transitions, 252 flow [2023-11-06 22:10:56,698 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:10:56,710 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 114 transitions, 252 flow [2023-11-06 22:10:56,713 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 114 transitions, 252 flow [2023-11-06 22:10:56,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 114 transitions, 252 flow [2023-11-06 22:10:56,751 INFO L124 PetriNetUnfolderBase]: 10/114 cut-off events. [2023-11-06 22:10:56,752 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:10:56,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 114 events. 10/114 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-11-06 22:10:56,756 INFO L119 LiptonReduction]: Number of co-enabled transitions 1224 [2023-11-06 22:11:02,968 INFO L134 LiptonReduction]: Checked pairs total: 1474 [2023-11-06 22:11:02,968 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-11-06 22:11:02,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:11:02,993 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@51fe9100, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:11:02,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:11:03,002 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:11:03,002 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2023-11-06 22:11:03,003 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 22:11:03,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:03,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:11:03,004 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)] === [2023-11-06 22:11:03,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:03,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1648368896, now seen corresponding path program 1 times [2023-11-06 22:11:03,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:03,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909718600] [2023-11-06 22:11:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:03,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:03,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:03,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909718600] [2023-11-06 22:11:03,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909718600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:03,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:03,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:11:03,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780058184] [2023-11-06 22:11:03,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:03,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:11:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:03,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:11:03,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:11:03,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 236 [2023-11-06 22:11:03,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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) [2023-11-06 22:11:03,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:03,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 236 [2023-11-06 22:11:03,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:03,717 INFO L124 PetriNetUnfolderBase]: 431/611 cut-off events. [2023-11-06 22:11:03,717 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2023-11-06 22:11:03,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 611 events. 431/611 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1733 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. [2023-11-06 22:11:03,726 INFO L140 encePairwiseOnDemand]: 230/236 looper letters, 39 selfloop transitions, 3 changer transitions 3/45 dead transitions. [2023-11-06 22:11:03,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 225 flow [2023-11-06 22:11:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:11:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:11:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-11-06 22:11:03,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538135593220339 [2023-11-06 22:11:03,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-11-06 22:11:03,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-11-06 22:11:03,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:03,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-11-06 22:11:03,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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) [2023-11-06 22:11:03,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 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) [2023-11-06 22:11:03,778 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 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) [2023-11-06 22:11:03,780 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 381 transitions. [2023-11-06 22:11:03,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 225 flow [2023-11-06 22:11:03,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 45 transitions, 195 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 22:11:03,790 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 81 flow [2023-11-06 22:11:03,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, 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} [2023-11-06 22:11:03,798 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2023-11-06 22:11:03,799 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 81 flow [2023-11-06 22:11:03,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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) [2023-11-06 22:11:03,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:03,800 INFO L208 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] [2023-11-06 22:11:03,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:11:03,800 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)] === [2023-11-06 22:11:03,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:03,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1540540622, now seen corresponding path program 1 times [2023-11-06 22:11:03,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:03,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516230071] [2023-11-06 22:11:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:03,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:04,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:04,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516230071] [2023-11-06 22:11:04,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516230071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:04,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:04,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:11:04,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101177939] [2023-11-06 22:11:04,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:04,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:11:04,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:04,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:11:04,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:11:04,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 236 [2023-11-06 22:11:04,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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) [2023-11-06 22:11:04,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:04,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 236 [2023-11-06 22:11:04,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:04,556 INFO L124 PetriNetUnfolderBase]: 487/709 cut-off events. [2023-11-06 22:11:04,557 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2023-11-06 22:11:04,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1718 conditions, 709 events. 487/709 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2192 event pairs, 45 based on Foata normal form. 24/733 useless extension candidates. Maximal degree in co-relation 584. Up to 369 conditions per place. [2023-11-06 22:11:04,566 INFO L140 encePairwiseOnDemand]: 231/236 looper letters, 55 selfloop transitions, 5 changer transitions 14/74 dead transitions. [2023-11-06 22:11:04,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 74 transitions, 349 flow [2023-11-06 22:11:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:11:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:11:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 600 transitions. [2023-11-06 22:11:04,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084745762711864 [2023-11-06 22:11:04,573 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 600 transitions. [2023-11-06 22:11:04,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 600 transitions. [2023-11-06 22:11:04,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:04,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 600 transitions. [2023-11-06 22:11:04,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 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) [2023-11-06 22:11:04,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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) [2023-11-06 22:11:04,588 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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) [2023-11-06 22:11:04,590 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 81 flow. Second operand 5 states and 600 transitions. [2023-11-06 22:11:04,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 74 transitions, 349 flow [2023-11-06 22:11:04,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 74 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:11:04,602 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 102 flow [2023-11-06 22:11:04,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, 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=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-11-06 22:11:04,603 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2023-11-06 22:11:04,604 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 102 flow [2023-11-06 22:11:04,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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) [2023-11-06 22:11:04,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:04,605 INFO L208 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] [2023-11-06 22:11:04,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:11:04,606 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)] === [2023-11-06 22:11:04,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash 52197340, now seen corresponding path program 1 times [2023-11-06 22:11:04,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:04,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358482580] [2023-11-06 22:11:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:04,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:04,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:04,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358482580] [2023-11-06 22:11:04,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358482580] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:04,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:04,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:11:04,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604951188] [2023-11-06 22:11:04,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:04,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:11:04,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:04,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:11:04,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:11:04,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 236 [2023-11-06 22:11:04,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 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) [2023-11-06 22:11:04,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:04,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 236 [2023-11-06 22:11:04,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:05,198 INFO L124 PetriNetUnfolderBase]: 717/1037 cut-off events. [2023-11-06 22:11:05,198 INFO L125 PetriNetUnfolderBase]: For 530/530 co-relation queries the response was YES. [2023-11-06 22:11:05,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2727 conditions, 1037 events. 717/1037 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3559 event pairs, 45 based on Foata normal form. 34/1071 useless extension candidates. Maximal degree in co-relation 1704. Up to 425 conditions per place. [2023-11-06 22:11:05,208 INFO L140 encePairwiseOnDemand]: 231/236 looper letters, 70 selfloop transitions, 6 changer transitions 1/77 dead transitions. [2023-11-06 22:11:05,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 77 transitions, 403 flow [2023-11-06 22:11:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:11:05,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:11:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 592 transitions. [2023-11-06 22:11:05,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016949152542373 [2023-11-06 22:11:05,211 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 592 transitions. [2023-11-06 22:11:05,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 592 transitions. [2023-11-06 22:11:05,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:05,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 592 transitions. [2023-11-06 22:11:05,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.4) internal successors, (592), 5 states have internal predecessors, (592), 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) [2023-11-06 22:11:05,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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) [2023-11-06 22:11:05,218 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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) [2023-11-06 22:11:05,218 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 102 flow. Second operand 5 states and 592 transitions. [2023-11-06 22:11:05,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 77 transitions, 403 flow [2023-11-06 22:11:05,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 77 transitions, 394 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:11:05,222 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 146 flow [2023-11-06 22:11:05,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-11-06 22:11:05,223 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-11-06 22:11:05,223 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 146 flow [2023-11-06 22:11:05,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 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) [2023-11-06 22:11:05,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:05,224 INFO L208 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] [2023-11-06 22:11:05,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:11:05,225 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)] === [2023-11-06 22:11:05,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash 894838092, now seen corresponding path program 2 times [2023-11-06 22:11:05,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:05,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49102357] [2023-11-06 22:11:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:05,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:05,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:05,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49102357] [2023-11-06 22:11:05,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49102357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:05,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:05,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:11:05,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938700543] [2023-11-06 22:11:05,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:05,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:11:05,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:05,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:11:05,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:11:05,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 236 [2023-11-06 22:11:05,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 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) [2023-11-06 22:11:05,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:05,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 236 [2023-11-06 22:11:05,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:05,708 INFO L124 PetriNetUnfolderBase]: 935/1327 cut-off events. [2023-11-06 22:11:05,709 INFO L125 PetriNetUnfolderBase]: For 1137/1137 co-relation queries the response was YES. [2023-11-06 22:11:05,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4189 conditions, 1327 events. 935/1327 cut-off events. For 1137/1137 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4559 event pairs, 147 based on Foata normal form. 72/1387 useless extension candidates. Maximal degree in co-relation 816. Up to 685 conditions per place. [2023-11-06 22:11:05,724 INFO L140 encePairwiseOnDemand]: 232/236 looper letters, 61 selfloop transitions, 5 changer transitions 10/76 dead transitions. [2023-11-06 22:11:05,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 76 transitions, 456 flow [2023-11-06 22:11:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:11:05,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:11:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 472 transitions. [2023-11-06 22:11:05,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-06 22:11:05,728 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 472 transitions. [2023-11-06 22:11:05,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 472 transitions. [2023-11-06 22:11:05,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:05,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 472 transitions. [2023-11-06 22:11:05,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.0) internal successors, (472), 4 states have internal predecessors, (472), 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) [2023-11-06 22:11:05,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 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) [2023-11-06 22:11:05,734 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 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) [2023-11-06 22:11:05,734 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 146 flow. Second operand 4 states and 472 transitions. [2023-11-06 22:11:05,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 76 transitions, 456 flow [2023-11-06 22:11:05,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 76 transitions, 456 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:11:05,739 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 167 flow [2023-11-06 22:11:05,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-11-06 22:11:05,740 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-11-06 22:11:05,740 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 167 flow [2023-11-06 22:11:05,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 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) [2023-11-06 22:11:05,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:05,741 INFO L208 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] [2023-11-06 22:11:05,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:11:05,742 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)] === [2023-11-06 22:11:05,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash 795109660, now seen corresponding path program 3 times [2023-11-06 22:11:05,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:05,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484853848] [2023-11-06 22:11:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:05,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:05,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:05,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484853848] [2023-11-06 22:11:05,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484853848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:05,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:05,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:11:05,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001097021] [2023-11-06 22:11:05,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:05,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:11:05,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:05,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:11:05,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:11:05,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 236 [2023-11-06 22:11:05,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 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) [2023-11-06 22:11:05,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:05,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 236 [2023-11-06 22:11:05,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:06,138 INFO L124 PetriNetUnfolderBase]: 775/1083 cut-off events. [2023-11-06 22:11:06,138 INFO L125 PetriNetUnfolderBase]: For 1482/1482 co-relation queries the response was YES. [2023-11-06 22:11:06,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3730 conditions, 1083 events. 775/1083 cut-off events. For 1482/1482 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3395 event pairs, 83 based on Foata normal form. 6/1089 useless extension candidates. Maximal degree in co-relation 1095. Up to 452 conditions per place. [2023-11-06 22:11:06,152 INFO L140 encePairwiseOnDemand]: 231/236 looper letters, 62 selfloop transitions, 10 changer transitions 7/79 dead transitions. [2023-11-06 22:11:06,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 79 transitions, 503 flow [2023-11-06 22:11:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:11:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:11:06,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2023-11-06 22:11:06,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4966101694915254 [2023-11-06 22:11:06,156 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2023-11-06 22:11:06,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2023-11-06 22:11:06,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:06,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2023-11-06 22:11:06,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 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) [2023-11-06 22:11:06,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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) [2023-11-06 22:11:06,164 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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) [2023-11-06 22:11:06,164 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 167 flow. Second operand 5 states and 586 transitions. [2023-11-06 22:11:06,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 79 transitions, 503 flow [2023-11-06 22:11:06,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 79 transitions, 496 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:11:06,170 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 192 flow [2023-11-06 22:11:06,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2023-11-06 22:11:06,171 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 8 predicate places. [2023-11-06 22:11:06,171 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 192 flow [2023-11-06 22:11:06,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 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) [2023-11-06 22:11:06,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:06,172 INFO L208 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] [2023-11-06 22:11:06,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:11:06,173 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)] === [2023-11-06 22:11:06,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:06,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1141120014, now seen corresponding path program 2 times [2023-11-06 22:11:06,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:06,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172212608] [2023-11-06 22:11:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:06,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:06,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:06,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172212608] [2023-11-06 22:11:06,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172212608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:06,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:06,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:11:06,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591542162] [2023-11-06 22:11:06,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:06,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:11:06,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:06,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:11:06,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:11:06,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 236 [2023-11-06 22:11:06,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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) [2023-11-06 22:11:06,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:06,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 236 [2023-11-06 22:11:06,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:06,604 INFO L124 PetriNetUnfolderBase]: 701/968 cut-off events. [2023-11-06 22:11:06,604 INFO L125 PetriNetUnfolderBase]: For 1761/1761 co-relation queries the response was YES. [2023-11-06 22:11:06,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3424 conditions, 968 events. 701/968 cut-off events. For 1761/1761 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2955 event pairs, 117 based on Foata normal form. 26/994 useless extension candidates. Maximal degree in co-relation 994. Up to 815 conditions per place. [2023-11-06 22:11:06,615 INFO L140 encePairwiseOnDemand]: 232/236 looper letters, 44 selfloop transitions, 6 changer transitions 14/64 dead transitions. [2023-11-06 22:11:06,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 64 transitions, 417 flow [2023-11-06 22:11:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:11:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:11:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 472 transitions. [2023-11-06 22:11:06,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-06 22:11:06,618 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 472 transitions. [2023-11-06 22:11:06,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 472 transitions. [2023-11-06 22:11:06,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:06,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 472 transitions. [2023-11-06 22:11:06,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.0) internal successors, (472), 4 states have internal predecessors, (472), 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) [2023-11-06 22:11:06,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 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) [2023-11-06 22:11:06,624 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 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) [2023-11-06 22:11:06,624 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 192 flow. Second operand 4 states and 472 transitions. [2023-11-06 22:11:06,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 64 transitions, 417 flow [2023-11-06 22:11:06,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 64 transitions, 415 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-06 22:11:06,630 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 246 flow [2023-11-06 22:11:06,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-11-06 22:11:06,634 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-11-06 22:11:06,634 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 246 flow [2023-11-06 22:11:06,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.5) internal successors, (442), 4 states have internal predecessors, (442), 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) [2023-11-06 22:11:06,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:06,635 INFO L208 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] [2023-11-06 22:11:06,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:11:06,636 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)] === [2023-11-06 22:11:06,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:06,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1325420412, now seen corresponding path program 3 times [2023-11-06 22:11:06,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:06,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984566153] [2023-11-06 22:11:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:06,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:06,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:06,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984566153] [2023-11-06 22:11:06,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984566153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:06,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:06,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:11:06,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374458624] [2023-11-06 22:11:06,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:06,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:11:06,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:11:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:11:06,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 236 [2023-11-06 22:11:06,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 246 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 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) [2023-11-06 22:11:06,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:06,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 236 [2023-11-06 22:11:06,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:07,094 INFO L124 PetriNetUnfolderBase]: 759/1034 cut-off events. [2023-11-06 22:11:07,095 INFO L125 PetriNetUnfolderBase]: For 3259/3259 co-relation queries the response was YES. [2023-11-06 22:11:07,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4042 conditions, 1034 events. 759/1034 cut-off events. For 3259/3259 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2926 event pairs, 184 based on Foata normal form. 22/1056 useless extension candidates. Maximal degree in co-relation 3680. Up to 825 conditions per place. [2023-11-06 22:11:07,106 INFO L140 encePairwiseOnDemand]: 232/236 looper letters, 52 selfloop transitions, 7 changer transitions 14/73 dead transitions. [2023-11-06 22:11:07,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 73 transitions, 598 flow [2023-11-06 22:11:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:11:07,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:11:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 461 transitions. [2023-11-06 22:11:07,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883474576271186 [2023-11-06 22:11:07,109 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 461 transitions. [2023-11-06 22:11:07,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 461 transitions. [2023-11-06 22:11:07,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:07,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 461 transitions. [2023-11-06 22:11:07,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 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) [2023-11-06 22:11:07,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 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) [2023-11-06 22:11:07,115 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 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) [2023-11-06 22:11:07,115 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 246 flow. Second operand 4 states and 461 transitions. [2023-11-06 22:11:07,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 73 transitions, 598 flow [2023-11-06 22:11:07,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 73 transitions, 574 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-06 22:11:07,123 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 319 flow [2023-11-06 22:11:07,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=319, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-06 22:11:07,124 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2023-11-06 22:11:07,125 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 319 flow [2023-11-06 22:11:07,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 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) [2023-11-06 22:11:07,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:07,126 INFO L208 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] [2023-11-06 22:11:07,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:11:07,126 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)] === [2023-11-06 22:11:07,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:07,127 INFO L85 PathProgramCache]: Analyzing trace with hash -537995636, now seen corresponding path program 4 times [2023-11-06 22:11:07,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:07,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753385988] [2023-11-06 22:11:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:07,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:07,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:07,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753385988] [2023-11-06 22:11:07,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753385988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:11:07,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:11:07,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:11:07,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450991976] [2023-11-06 22:11:07,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:11:07,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:11:07,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:07,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:11:07,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:11:07,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 236 [2023-11-06 22:11:07,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 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) [2023-11-06 22:11:07,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:07,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 236 [2023-11-06 22:11:07,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:07,507 INFO L124 PetriNetUnfolderBase]: 600/807 cut-off events. [2023-11-06 22:11:07,507 INFO L125 PetriNetUnfolderBase]: For 2550/2550 co-relation queries the response was YES. [2023-11-06 22:11:07,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3482 conditions, 807 events. 600/807 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2192 event pairs, 66 based on Foata normal form. 32/839 useless extension candidates. Maximal degree in co-relation 3149. Up to 595 conditions per place. [2023-11-06 22:11:07,518 INFO L140 encePairwiseOnDemand]: 232/236 looper letters, 54 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2023-11-06 22:11:07,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 511 flow [2023-11-06 22:11:07,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:11:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:11:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2023-11-06 22:11:07,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904661016949153 [2023-11-06 22:11:07,522 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2023-11-06 22:11:07,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2023-11-06 22:11:07,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:07,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2023-11-06 22:11:07,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 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) [2023-11-06 22:11:07,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 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) [2023-11-06 22:11:07,528 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 236.0) internal successors, (1180), 5 states have internal predecessors, (1180), 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) [2023-11-06 22:11:07,528 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 319 flow. Second operand 4 states and 463 transitions. [2023-11-06 22:11:07,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 511 flow [2023-11-06 22:11:07,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 495 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-06 22:11:07,537 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 317 flow [2023-11-06 22:11:07,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=317, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-11-06 22:11:07,540 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 15 predicate places. [2023-11-06 22:11:07,541 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 317 flow [2023-11-06 22:11:07,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 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) [2023-11-06 22:11:07,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:07,542 INFO L208 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] [2023-11-06 22:11:07,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:11:07,542 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)] === [2023-11-06 22:11:07,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:07,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1320266136, now seen corresponding path program 1 times [2023-11-06 22:11:07,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:07,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657729460] [2023-11-06 22:11:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:07,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:11:07,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:07,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657729460] [2023-11-06 22:11:07,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657729460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:07,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587369743] [2023-11-06 22:11:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:07,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:07,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:07,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:07,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:11:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:07,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:11:07,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:07,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:08,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587369743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:08,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:08,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2023-11-06 22:11:08,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027630353] [2023-11-06 22:11:08,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:08,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:11:08,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:08,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:11:08,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:11:08,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 236 [2023-11-06 22:11:08,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 317 flow. Second operand has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 6 states have internal predecessors, (664), 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) [2023-11-06 22:11:08,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:08,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 236 [2023-11-06 22:11:08,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:08,787 INFO L124 PetriNetUnfolderBase]: 1846/2536 cut-off events. [2023-11-06 22:11:08,788 INFO L125 PetriNetUnfolderBase]: For 8620/8620 co-relation queries the response was YES. [2023-11-06 22:11:08,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10829 conditions, 2536 events. 1846/2536 cut-off events. For 8620/8620 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9340 event pairs, 64 based on Foata normal form. 327/2863 useless extension candidates. Maximal degree in co-relation 3236. Up to 1177 conditions per place. [2023-11-06 22:11:08,823 INFO L140 encePairwiseOnDemand]: 229/236 looper letters, 141 selfloop transitions, 47 changer transitions 7/195 dead transitions. [2023-11-06 22:11:08,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 195 transitions, 1609 flow [2023-11-06 22:11:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:11:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:11:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1185 transitions. [2023-11-06 22:11:08,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021186440677966 [2023-11-06 22:11:08,829 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1185 transitions. [2023-11-06 22:11:08,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1185 transitions. [2023-11-06 22:11:08,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:08,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1185 transitions. [2023-11-06 22:11:08,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 118.5) internal successors, (1185), 10 states have internal predecessors, (1185), 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) [2023-11-06 22:11:08,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 236.0) internal successors, (2596), 11 states have internal predecessors, (2596), 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) [2023-11-06 22:11:08,844 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 236.0) internal successors, (2596), 11 states have internal predecessors, (2596), 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) [2023-11-06 22:11:08,844 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 317 flow. Second operand 10 states and 1185 transitions. [2023-11-06 22:11:08,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 195 transitions, 1609 flow [2023-11-06 22:11:08,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 195 transitions, 1540 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-11-06 22:11:08,857 INFO L231 Difference]: Finished difference. Result has 63 places, 85 transitions, 903 flow [2023-11-06 22:11:08,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=903, PETRI_PLACES=63, PETRI_TRANSITIONS=85} [2023-11-06 22:11:08,859 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2023-11-06 22:11:08,860 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 85 transitions, 903 flow [2023-11-06 22:11:08,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.66666666666667) internal successors, (664), 6 states have internal predecessors, (664), 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) [2023-11-06 22:11:08,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:08,860 INFO L208 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] [2023-11-06 22:11:08,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:09,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:11:09,070 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)] === [2023-11-06 22:11:09,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1379768293, now seen corresponding path program 1 times [2023-11-06 22:11:09,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:09,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870419750] [2023-11-06 22:11:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:09,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:09,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:09,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870419750] [2023-11-06 22:11:09,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870419750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:09,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514588704] [2023-11-06 22:11:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:09,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:09,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:09,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:09,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:11:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:09,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:11:09,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:09,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:11:09,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514588704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:09,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:09,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-11-06 22:11:09,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018053957] [2023-11-06 22:11:09,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:09,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:11:09,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:09,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:11:09,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:11:09,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 236 [2023-11-06 22:11:09,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 85 transitions, 903 flow. Second operand has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 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) [2023-11-06 22:11:09,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:09,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 236 [2023-11-06 22:11:09,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:10,550 INFO L124 PetriNetUnfolderBase]: 3572/4905 cut-off events. [2023-11-06 22:11:10,551 INFO L125 PetriNetUnfolderBase]: For 34247/34247 co-relation queries the response was YES. [2023-11-06 22:11:10,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25846 conditions, 4905 events. 3572/4905 cut-off events. For 34247/34247 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 20713 event pairs, 534 based on Foata normal form. 213/5118 useless extension candidates. Maximal degree in co-relation 14348. Up to 2253 conditions per place. [2023-11-06 22:11:10,628 INFO L140 encePairwiseOnDemand]: 230/236 looper letters, 106 selfloop transitions, 92 changer transitions 3/201 dead transitions. [2023-11-06 22:11:10,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 201 transitions, 2224 flow [2023-11-06 22:11:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:11:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:11:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2023-11-06 22:11:10,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-11-06 22:11:10,632 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2023-11-06 22:11:10,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2023-11-06 22:11:10,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:10,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2023-11-06 22:11:10,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 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) [2023-11-06 22:11:10,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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) [2023-11-06 22:11:10,640 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 236.0) internal successors, (1416), 6 states have internal predecessors, (1416), 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) [2023-11-06 22:11:10,641 INFO L175 Difference]: Start difference. First operand has 63 places, 85 transitions, 903 flow. Second operand 5 states and 649 transitions. [2023-11-06 22:11:10,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 201 transitions, 2224 flow [2023-11-06 22:11:10,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 201 transitions, 2118 flow, removed 41 selfloop flow, removed 1 redundant places. [2023-11-06 22:11:10,705 INFO L231 Difference]: Finished difference. Result has 68 places, 136 transitions, 1743 flow [2023-11-06 22:11:10,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1743, PETRI_PLACES=68, PETRI_TRANSITIONS=136} [2023-11-06 22:11:10,707 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 34 predicate places. [2023-11-06 22:11:10,707 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 136 transitions, 1743 flow [2023-11-06 22:11:10,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 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) [2023-11-06 22:11:10,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:10,708 INFO L208 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, 1] [2023-11-06 22:11:10,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:10,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:11:10,915 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)] === [2023-11-06 22:11:10,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:10,916 INFO L85 PathProgramCache]: Analyzing trace with hash -803360777, now seen corresponding path program 2 times [2023-11-06 22:11:10,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:10,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179195647] [2023-11-06 22:11:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:10,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:11:11,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:11,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179195647] [2023-11-06 22:11:11,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179195647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:11,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385092381] [2023-11-06 22:11:11,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:11:11,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:11,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:11,102 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:11,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:11:11,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:11:11,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:11,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:11:11,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:11,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:11,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385092381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:11,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:11,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-06 22:11:11,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661362590] [2023-11-06 22:11:11,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:11,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:11:11,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:11,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:11:11,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:11:11,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 236 [2023-11-06 22:11:11,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 136 transitions, 1743 flow. Second operand has 14 states, 14 states have (on average 101.42857142857143) internal successors, (1420), 14 states have internal predecessors, (1420), 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) [2023-11-06 22:11:11,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:11,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 236 [2023-11-06 22:11:11,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:17,107 INFO L124 PetriNetUnfolderBase]: 16506/22809 cut-off events. [2023-11-06 22:11:17,108 INFO L125 PetriNetUnfolderBase]: For 191413/191413 co-relation queries the response was YES. [2023-11-06 22:11:17,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131181 conditions, 22809 events. 16506/22809 cut-off events. For 191413/191413 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 124575 event pairs, 784 based on Foata normal form. 2778/25587 useless extension candidates. Maximal degree in co-relation 64032. Up to 8387 conditions per place. [2023-11-06 22:11:17,403 INFO L140 encePairwiseOnDemand]: 229/236 looper letters, 822 selfloop transitions, 377 changer transitions 0/1199 dead transitions. [2023-11-06 22:11:17,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 1199 transitions, 15857 flow [2023-11-06 22:11:17,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:11:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 22:11:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4359 transitions. [2023-11-06 22:11:17,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46175847457627117 [2023-11-06 22:11:17,423 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4359 transitions. [2023-11-06 22:11:17,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4359 transitions. [2023-11-06 22:11:17,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:17,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4359 transitions. [2023-11-06 22:11:17,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 108.975) internal successors, (4359), 40 states have internal predecessors, (4359), 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) [2023-11-06 22:11:17,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 236.0) internal successors, (9676), 41 states have internal predecessors, (9676), 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) [2023-11-06 22:11:17,466 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 236.0) internal successors, (9676), 41 states have internal predecessors, (9676), 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) [2023-11-06 22:11:17,466 INFO L175 Difference]: Start difference. First operand has 68 places, 136 transitions, 1743 flow. Second operand 40 states and 4359 transitions. [2023-11-06 22:11:17,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 1199 transitions, 15857 flow [2023-11-06 22:11:18,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 1199 transitions, 14613 flow, removed 616 selfloop flow, removed 1 redundant places. [2023-11-06 22:11:18,527 INFO L231 Difference]: Finished difference. Result has 137 places, 549 transitions, 7823 flow [2023-11-06 22:11:18,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=7823, PETRI_PLACES=137, PETRI_TRANSITIONS=549} [2023-11-06 22:11:18,528 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 103 predicate places. [2023-11-06 22:11:18,528 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 549 transitions, 7823 flow [2023-11-06 22:11:18,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 101.42857142857143) internal successors, (1420), 14 states have internal predecessors, (1420), 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) [2023-11-06 22:11:18,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:18,530 INFO L208 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, 1] [2023-11-06 22:11:18,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:18,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:11:18,737 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)] === [2023-11-06 22:11:18,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:18,738 INFO L85 PathProgramCache]: Analyzing trace with hash -949409995, now seen corresponding path program 3 times [2023-11-06 22:11:18,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:18,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044762711] [2023-11-06 22:11:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:19,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:19,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044762711] [2023-11-06 22:11:19,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044762711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:19,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451177436] [2023-11-06 22:11:19,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:11:19,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:19,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:19,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:19,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:11:19,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:11:19,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:19,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:11:19,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:19,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:19,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451177436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:19,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:19,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-06 22:11:19,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240469702] [2023-11-06 22:11:19,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:19,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:11:19,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:19,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:11:19,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:11:19,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 236 [2023-11-06 22:11:19,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 549 transitions, 7823 flow. Second operand has 13 states, 13 states have (on average 106.53846153846153) internal successors, (1385), 13 states have internal predecessors, (1385), 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) [2023-11-06 22:11:19,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:19,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 236 [2023-11-06 22:11:19,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:29,169 INFO L124 PetriNetUnfolderBase]: 25824/35929 cut-off events. [2023-11-06 22:11:29,169 INFO L125 PetriNetUnfolderBase]: For 1264546/1264546 co-relation queries the response was YES. [2023-11-06 22:11:29,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301773 conditions, 35929 events. 25824/35929 cut-off events. For 1264546/1264546 co-relation queries the response was YES. Maximal size of possible extension queue 1493. Compared 214239 event pairs, 2822 based on Foata normal form. 1598/37527 useless extension candidates. Maximal degree in co-relation 282240. Up to 11289 conditions per place. [2023-11-06 22:11:29,691 INFO L140 encePairwiseOnDemand]: 231/236 looper letters, 1120 selfloop transitions, 252 changer transitions 136/1508 dead transitions. [2023-11-06 22:11:29,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 1508 transitions, 24208 flow [2023-11-06 22:11:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:11:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:11:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1950 transitions. [2023-11-06 22:11:29,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860418743768694 [2023-11-06 22:11:29,700 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1950 transitions. [2023-11-06 22:11:29,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1950 transitions. [2023-11-06 22:11:29,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:29,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1950 transitions. [2023-11-06 22:11:29,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 114.70588235294117) internal successors, (1950), 17 states have internal predecessors, (1950), 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) [2023-11-06 22:11:29,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 236.0) internal successors, (4248), 18 states have internal predecessors, (4248), 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) [2023-11-06 22:11:29,718 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 236.0) internal successors, (4248), 18 states have internal predecessors, (4248), 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) [2023-11-06 22:11:29,719 INFO L175 Difference]: Start difference. First operand has 137 places, 549 transitions, 7823 flow. Second operand 17 states and 1950 transitions. [2023-11-06 22:11:29,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 1508 transitions, 24208 flow [2023-11-06 22:11:36,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 1508 transitions, 22822 flow, removed 693 selfloop flow, removed 0 redundant places. [2023-11-06 22:11:36,779 INFO L231 Difference]: Finished difference. Result has 162 places, 737 transitions, 10507 flow [2023-11-06 22:11:36,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=7085, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10507, PETRI_PLACES=162, PETRI_TRANSITIONS=737} [2023-11-06 22:11:36,780 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 128 predicate places. [2023-11-06 22:11:36,780 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 737 transitions, 10507 flow [2023-11-06 22:11:36,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 106.53846153846153) internal successors, (1385), 13 states have internal predecessors, (1385), 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) [2023-11-06 22:11:36,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:11:36,781 INFO L208 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, 1] [2023-11-06 22:11:36,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:11:36,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:36,992 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)] === [2023-11-06 22:11:36,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:11:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash 353959445, now seen corresponding path program 4 times [2023-11-06 22:11:36,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:11:36,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713989148] [2023-11-06 22:11:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:11:36,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:11:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:11:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:11:37,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:11:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713989148] [2023-11-06 22:11:37,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713989148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:11:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532904362] [2023-11-06 22:11:37,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:11:37,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:11:37,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:11:37,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:11:37,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:11:37,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:11:37,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:11:37,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:11:37,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:11:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:37,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:11:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:11:37,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532904362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:11:37,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:11:37,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-06 22:11:37,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826454783] [2023-11-06 22:11:37,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:11:37,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:11:37,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:11:37,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:11:37,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:11:37,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 236 [2023-11-06 22:11:37,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 737 transitions, 10507 flow. Second operand has 14 states, 14 states have (on average 101.14285714285714) internal successors, (1416), 14 states have internal predecessors, (1416), 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) [2023-11-06 22:11:37,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:11:37,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 236 [2023-11-06 22:11:37,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:11:53,394 INFO L124 PetriNetUnfolderBase]: 38655/52812 cut-off events. [2023-11-06 22:11:53,394 INFO L125 PetriNetUnfolderBase]: For 1956723/1956723 co-relation queries the response was YES. [2023-11-06 22:11:53,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471941 conditions, 52812 events. 38655/52812 cut-off events. For 1956723/1956723 co-relation queries the response was YES. Maximal size of possible extension queue 1928. Compared 314969 event pairs, 2382 based on Foata normal form. 3242/56054 useless extension candidates. Maximal degree in co-relation 467670. Up to 16159 conditions per place. [2023-11-06 22:11:54,202 INFO L140 encePairwiseOnDemand]: 229/236 looper letters, 1586 selfloop transitions, 750 changer transitions 68/2404 dead transitions. [2023-11-06 22:11:54,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 2404 transitions, 39237 flow [2023-11-06 22:11:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:11:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:11:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2728 transitions. [2023-11-06 22:11:54,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623728813559322 [2023-11-06 22:11:54,211 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2728 transitions. [2023-11-06 22:11:54,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2728 transitions. [2023-11-06 22:11:54,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:11:54,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2728 transitions. [2023-11-06 22:11:54,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 109.12) internal successors, (2728), 25 states have internal predecessors, (2728), 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) [2023-11-06 22:11:54,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 236.0) internal successors, (6136), 26 states have internal predecessors, (6136), 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) [2023-11-06 22:11:54,236 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 236.0) internal successors, (6136), 26 states have internal predecessors, (6136), 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) [2023-11-06 22:11:54,236 INFO L175 Difference]: Start difference. First operand has 162 places, 737 transitions, 10507 flow. Second operand 25 states and 2728 transitions. [2023-11-06 22:11:54,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 2404 transitions, 39237 flow [2023-11-06 22:12:13,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 2404 transitions, 37606 flow, removed 800 selfloop flow, removed 5 redundant places. [2023-11-06 22:12:13,204 INFO L231 Difference]: Finished difference. Result has 188 places, 1226 transitions, 20144 flow [2023-11-06 22:12:13,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=9297, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=20144, PETRI_PLACES=188, PETRI_TRANSITIONS=1226} [2023-11-06 22:12:13,206 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 154 predicate places. [2023-11-06 22:12:13,206 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 1226 transitions, 20144 flow [2023-11-06 22:12:13,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 101.14285714285714) internal successors, (1416), 14 states have internal predecessors, (1416), 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) [2023-11-06 22:12:13,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:12:13,208 INFO L208 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, 1] [2023-11-06 22:12:13,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:12:13,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:12:13,418 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)] === [2023-11-06 22:12:13,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:12:13,419 INFO L85 PathProgramCache]: Analyzing trace with hash 121120219, now seen corresponding path program 5 times [2023-11-06 22:12:13,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:12:13,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628040322] [2023-11-06 22:12:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:12:13,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:12:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:12:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:12:13,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:12:13,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628040322] [2023-11-06 22:12:13,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628040322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:12:13,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799899998] [2023-11-06 22:12:13,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:12:13,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:12:13,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:12:13,570 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:12:13,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd93e432-4403-4bd8-a713-bc46151b5bb5/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:12:13,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:12:13,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:12:13,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:12:13,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:12:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:12:13,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:12:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:12:14,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799899998] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:12:14,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:12:14,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-06 22:12:14,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013342284] [2023-11-06 22:12:14,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:12:14,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:12:14,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:12:14,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:12:14,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:12:14,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 236 [2023-11-06 22:12:14,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 1226 transitions, 20144 flow. Second operand has 13 states, 13 states have (on average 101.53846153846153) internal successors, (1320), 13 states have internal predecessors, (1320), 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) [2023-11-06 22:12:14,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:12:14,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 236 [2023-11-06 22:12:14,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:12:44,995 INFO L124 PetriNetUnfolderBase]: 59513/80888 cut-off events. [2023-11-06 22:12:44,995 INFO L125 PetriNetUnfolderBase]: For 3634685/3634685 co-relation queries the response was YES.