./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12.i --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_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/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_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/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_f7774dd8-6edd-4e19-adde-4e680229e56d/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 f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:41:37,529 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:41:37,617 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:41:37,624 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:41:37,625 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:41:37,659 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:41:37,660 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:41:37,661 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:41:37,662 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:41:37,663 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:41:37,664 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:41:37,665 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:41:37,665 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:41:37,666 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:41:37,667 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:41:37,668 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:41:37,669 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:41:37,670 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:41:37,671 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:41:37,671 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:41:37,672 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:41:37,673 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:41:37,674 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:41:37,675 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:41:37,676 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:41:37,677 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:41:37,677 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:41:37,678 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:41:37,679 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:41:37,680 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:41:37,680 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:41:37,681 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:41:37,682 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:41:37,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:41:37,683 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:41:37,683 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:41:37,684 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:41:37,684 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:41:37,685 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:41:37,685 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_f7774dd8-6edd-4e19-adde-4e680229e56d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 [2023-11-06 22:41:38,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:41:38,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:41:38,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:41:38,112 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:41:38,112 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:41:38,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-lit/sssc12.i [2023-11-06 22:41:41,320 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:41:41,623 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:41:41,628 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/sv-benchmarks/c/pthread-lit/sssc12.i [2023-11-06 22:41:41,648 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/data/3be892bc6/c52a0eab621744649328292b4a2f9ccc/FLAG99692c762 [2023-11-06 22:41:41,664 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/data/3be892bc6/c52a0eab621744649328292b4a2f9ccc [2023-11-06 22:41:41,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:41:41,679 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:41:41,683 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:41:41,684 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:41:41,690 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:41:41,690 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:41" (1/1) ... [2023-11-06 22:41:41,691 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743727c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:41, skipping insertion in model container [2023-11-06 22:41:41,692 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:41:41" (1/1) ... [2023-11-06 22:41:41,755 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:41:42,300 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_f7774dd8-6edd-4e19-adde-4e680229e56d/sv-benchmarks/c/pthread-lit/sssc12.i[46865,46878] [2023-11-06 22:41:42,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:41:42,340 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:41:42,397 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_f7774dd8-6edd-4e19-adde-4e680229e56d/sv-benchmarks/c/pthread-lit/sssc12.i[46865,46878] [2023-11-06 22:41:42,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:41:42,502 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:41:42,502 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:41:42,510 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:41:42,511 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42 WrapperNode [2023-11-06 22:41:42,511 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:41:42,513 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:41:42,513 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:41:42,513 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:41:42,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42" (1/1) ... [2023-11-06 22:41:42,559 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42" (1/1) ... [2023-11-06 22:41:42,588 INFO L138 Inliner]: procedures = 275, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 82 [2023-11-06 22:41:42,588 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:41:42,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:41:42,589 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:41:42,590 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:41:42,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42" (1/1) ... [2023-11-06 22:41:42,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42" (1/1) ... [2023-11-06 22:41:42,620 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42" (1/1) ... [2023-11-06 22:41:42,620 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42" (1/1) ... [2023-11-06 22:41:42,627 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42" (1/1) ... [2023-11-06 22:41:42,638 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42" (1/1) ... [2023-11-06 22:41:42,640 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42" (1/1) ... [2023-11-06 22:41:42,651 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42" (1/1) ... [2023-11-06 22:41:42,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:41:42,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:41:42,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:41:42,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:41:42,656 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42" (1/1) ... [2023-11-06 22:41:42,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:41:42,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:42,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:41:42,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:41:42,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:41:42,763 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-11-06 22:41:42,763 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-11-06 22:41:42,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:41:42,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:41:42,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:41:42,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:41:42,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:41:42,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:41:42,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:41:42,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:41:42,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:41:42,769 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 22:41:42,937 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:41:42,939 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:41:43,175 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:41:43,227 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:41:43,228 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:41:43,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:43 BoogieIcfgContainer [2023-11-06 22:41:43,231 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:41:43,233 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:41:43,233 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:41:43,237 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:41:43,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:41:41" (1/3) ... [2023-11-06 22:41:43,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45cc9c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:43, skipping insertion in model container [2023-11-06 22:41:43,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:41:42" (2/3) ... [2023-11-06 22:41:43,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45cc9c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:41:43, skipping insertion in model container [2023-11-06 22:41:43,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:41:43" (3/3) ... [2023-11-06 22:41:43,240 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12.i [2023-11-06 22:41:43,249 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:41:43,261 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:41:43,261 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:41:43,261 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:41:43,322 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:41:43,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 160 flow [2023-11-06 22:41:43,425 INFO L124 PetriNetUnfolderBase]: 7/90 cut-off events. [2023-11-06 22:41:43,425 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:41:43,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 46. Up to 4 conditions per place. [2023-11-06 22:41:43,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 78 transitions, 160 flow [2023-11-06 22:41:43,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 78 transitions, 160 flow [2023-11-06 22:41:43,452 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:41:43,465 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 78 transitions, 160 flow [2023-11-06 22:41:43,469 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 78 transitions, 160 flow [2023-11-06 22:41:43,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 160 flow [2023-11-06 22:41:43,514 INFO L124 PetriNetUnfolderBase]: 7/90 cut-off events. [2023-11-06 22:41:43,514 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:41:43,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 90 events. 7/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 46. Up to 4 conditions per place. [2023-11-06 22:41:43,517 INFO L119 LiptonReduction]: Number of co-enabled transitions 960 [2023-11-06 22:41:46,817 INFO L134 LiptonReduction]: Checked pairs total: 867 [2023-11-06 22:41:46,818 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-11-06 22:41:46,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:41:46,841 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;@74970aff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:41:46,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:41:46,847 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:41:46,847 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-11-06 22:41:46,848 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:41:46,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:46,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:41:46,849 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:46,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:46,855 INFO L85 PathProgramCache]: Analyzing trace with hash 359781681, now seen corresponding path program 1 times [2023-11-06 22:41:46,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:46,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142957298] [2023-11-06 22:41:46,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:46,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:47,365 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 22:41:47,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:47,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142957298] [2023-11-06 22:41:47,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142957298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:47,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:47,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:47,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746573766] [2023-11-06 22:41:47,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:47,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:41:47,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:41:47,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:41:47,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 164 [2023-11-06 22:41:47,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 24 flow. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 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 22:41:47,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:47,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 164 [2023-11-06 22:41:47,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:47,517 INFO L124 PetriNetUnfolderBase]: 13/34 cut-off events. [2023-11-06 22:41:47,518 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:41:47,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 34 events. 13/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 70 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 60. Up to 19 conditions per place. [2023-11-06 22:41:47,520 INFO L140 encePairwiseOnDemand]: 159/164 looper letters, 11 selfloop transitions, 3 changer transitions 0/15 dead transitions. [2023-11-06 22:41:47,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 15 transitions, 62 flow [2023-11-06 22:41:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:41:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:41:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 258 transitions. [2023-11-06 22:41:47,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2023-11-06 22:41:47,538 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 258 transitions. [2023-11-06 22:41:47,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 258 transitions. [2023-11-06 22:41:47,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:47,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 258 transitions. [2023-11-06 22:41:47,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 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 22:41:47,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 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 22:41:47,552 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 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 22:41:47,554 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 24 flow. Second operand 4 states and 258 transitions. [2023-11-06 22:41:47,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 15 transitions, 62 flow [2023-11-06 22:41:47,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 15 transitions, 62 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:41:47,559 INFO L231 Difference]: Finished difference. Result has 15 places, 10 transitions, 36 flow [2023-11-06 22:41:47,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=36, PETRI_PLACES=15, PETRI_TRANSITIONS=10} [2023-11-06 22:41:47,566 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, 3 predicate places. [2023-11-06 22:41:47,566 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 10 transitions, 36 flow [2023-11-06 22:41:47,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 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 22:41:47,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:47,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:41:47,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:41:47,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:41:47,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1731730430, now seen corresponding path program 1 times [2023-11-06 22:41:47,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:47,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083228981] [2023-11-06 22:41:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:47,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:41:47,596 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:41:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:41:47,627 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:41:47,628 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:41:47,629 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-06 22:41:47,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-06 22:41:47,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-06 22:41:47,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:41:47,633 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:41:47,636 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:41:47,636 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:41:47,660 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:41:47,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 111 transitions, 232 flow [2023-11-06 22:41:47,707 INFO L124 PetriNetUnfolderBase]: 12/137 cut-off events. [2023-11-06 22:41:47,707 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:41:47,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 137 events. 12/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 257 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-11-06 22:41:47,712 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 111 transitions, 232 flow [2023-11-06 22:41:47,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 111 transitions, 232 flow [2023-11-06 22:41:47,714 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:41:47,715 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 111 transitions, 232 flow [2023-11-06 22:41:47,715 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 111 transitions, 232 flow [2023-11-06 22:41:47,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 111 transitions, 232 flow [2023-11-06 22:41:47,759 INFO L124 PetriNetUnfolderBase]: 12/137 cut-off events. [2023-11-06 22:41:47,760 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:41:47,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 137 events. 12/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 257 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-11-06 22:41:47,769 INFO L119 LiptonReduction]: Number of co-enabled transitions 4032 [2023-11-06 22:41:50,691 INFO L134 LiptonReduction]: Checked pairs total: 7565 [2023-11-06 22:41:50,691 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-11-06 22:41:50,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:41:50,695 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;@74970aff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:41:50,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:41:50,706 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:41:50,711 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-06 22:41:50,712 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:41:50,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:50,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:50,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:41:50,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:50,713 INFO L85 PathProgramCache]: Analyzing trace with hash 478073983, now seen corresponding path program 1 times [2023-11-06 22:41:50,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:50,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25132384] [2023-11-06 22:41:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:50,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:50,832 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 22:41:50,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:50,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25132384] [2023-11-06 22:41:50,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25132384] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:50,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:50,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:50,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429478066] [2023-11-06 22:41:50,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:50,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:50,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:50,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:50,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:50,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 222 [2023-11-06 22:41:50,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 22:41:50,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:50,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 222 [2023-11-06 22:41:50,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:51,020 INFO L124 PetriNetUnfolderBase]: 301/519 cut-off events. [2023-11-06 22:41:51,020 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-06 22:41:51,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 519 events. 301/519 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2584 event pairs, 132 based on Foata normal form. 0/386 useless extension candidates. Maximal degree in co-relation 458. Up to 291 conditions per place. [2023-11-06 22:41:51,026 INFO L140 encePairwiseOnDemand]: 217/222 looper letters, 32 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-11-06 22:41:51,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 39 transitions, 161 flow [2023-11-06 22:41:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:51,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2023-11-06 22:41:51,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624624624624625 [2023-11-06 22:41:51,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2023-11-06 22:41:51,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2023-11-06 22:41:51,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:51,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2023-11-06 22:41:51,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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 22:41:51,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 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 22:41:51,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 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 22:41:51,043 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 68 flow. Second operand 3 states and 308 transitions. [2023-11-06 22:41:51,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 39 transitions, 161 flow [2023-11-06 22:41:51,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 39 transitions, 161 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:41:51,046 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 76 flow [2023-11-06 22:41:51,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-06 22:41:51,047 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-06 22:41:51,047 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 76 flow [2023-11-06 22:41:51,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 22:41:51,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:51,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:51,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:41:51,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:41:51,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:51,049 INFO L85 PathProgramCache]: Analyzing trace with hash 75882573, now seen corresponding path program 1 times [2023-11-06 22:41:51,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:51,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557269530] [2023-11-06 22:41:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:51,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:51,229 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 22:41:51,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:51,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557269530] [2023-11-06 22:41:51,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557269530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:51,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:51,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:51,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218316074] [2023-11-06 22:41:51,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:51,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:41:51,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:51,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:41:51,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:41:51,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 222 [2023-11-06 22:41:51,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 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 22:41:51,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:51,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 222 [2023-11-06 22:41:51,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:51,494 INFO L124 PetriNetUnfolderBase]: 494/843 cut-off events. [2023-11-06 22:41:51,494 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2023-11-06 22:41:51,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1842 conditions, 843 events. 494/843 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4691 event pairs, 42 based on Foata normal form. 0/656 useless extension candidates. Maximal degree in co-relation 1668. Up to 310 conditions per place. [2023-11-06 22:41:51,502 INFO L140 encePairwiseOnDemand]: 215/222 looper letters, 60 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2023-11-06 22:41:51,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 73 transitions, 326 flow [2023-11-06 22:41:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:41:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:41:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 498 transitions. [2023-11-06 22:41:51,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4486486486486487 [2023-11-06 22:41:51,506 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 498 transitions. [2023-11-06 22:41:51,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 498 transitions. [2023-11-06 22:41:51,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:51,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 498 transitions. [2023-11-06 22:41:51,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 99.6) internal successors, (498), 5 states have internal predecessors, (498), 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 22:41:51,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 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 22:41:51,512 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 222.0) internal successors, (1332), 6 states have internal predecessors, (1332), 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 22:41:51,513 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 76 flow. Second operand 5 states and 498 transitions. [2023-11-06 22:41:51,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 73 transitions, 326 flow [2023-11-06 22:41:51,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 73 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:41:51,516 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 126 flow [2023-11-06 22:41:51,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-11-06 22:41:51,517 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-11-06 22:41:51,517 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 126 flow [2023-11-06 22:41:51,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 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 22:41:51,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:51,518 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:41:51,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:41:51,519 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:41:51,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash -173732413, now seen corresponding path program 1 times [2023-11-06 22:41:51,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:51,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762682961] [2023-11-06 22:41:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:51,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:41:51,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:41:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:41:51,561 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:41:51,561 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:41:51,562 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-06 22:41:51,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-06 22:41:51,562 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-06 22:41:51,563 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-06 22:41:51,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:41:51,563 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:41:51,564 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:41:51,564 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:41:51,598 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:41:51,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 144 transitions, 306 flow [2023-11-06 22:41:51,648 INFO L124 PetriNetUnfolderBase]: 17/184 cut-off events. [2023-11-06 22:41:51,648 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:41:51,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 184 events. 17/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 432 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-11-06 22:41:51,649 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 144 transitions, 306 flow [2023-11-06 22:41:51,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 144 transitions, 306 flow [2023-11-06 22:41:51,653 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:41:51,653 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 144 transitions, 306 flow [2023-11-06 22:41:51,654 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 144 transitions, 306 flow [2023-11-06 22:41:51,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 144 transitions, 306 flow [2023-11-06 22:41:51,687 INFO L124 PetriNetUnfolderBase]: 17/184 cut-off events. [2023-11-06 22:41:51,687 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:41:51,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 184 events. 17/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 432 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 141. Up to 8 conditions per place. [2023-11-06 22:41:51,695 INFO L119 LiptonReduction]: Number of co-enabled transitions 9216 [2023-11-06 22:41:55,213 INFO L134 LiptonReduction]: Checked pairs total: 18368 [2023-11-06 22:41:55,213 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-11-06 22:41:55,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:41:55,218 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;@74970aff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:41:55,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:41:55,222 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:41:55,222 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-06 22:41:55,223 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:41:55,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:55,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:55,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:41:55,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:55,224 INFO L85 PathProgramCache]: Analyzing trace with hash 539792086, now seen corresponding path program 1 times [2023-11-06 22:41:55,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:55,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030309997] [2023-11-06 22:41:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:55,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:55,281 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 22:41:55,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:55,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030309997] [2023-11-06 22:41:55,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030309997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:55,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:55,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:55,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534270873] [2023-11-06 22:41:55,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:55,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:55,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:55,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:55,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 291 [2023-11-06 22:41:55,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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 22:41:55,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:55,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 291 [2023-11-06 22:41:55,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:55,983 INFO L124 PetriNetUnfolderBase]: 4105/5966 cut-off events. [2023-11-06 22:41:55,983 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2023-11-06 22:41:55,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11988 conditions, 5966 events. 4105/5966 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 34272 event pairs, 1819 based on Foata normal form. 0/4312 useless extension candidates. Maximal degree in co-relation 2102. Up to 3294 conditions per place. [2023-11-06 22:41:56,033 INFO L140 encePairwiseOnDemand]: 286/291 looper letters, 52 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-06 22:41:56,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 61 transitions, 260 flow [2023-11-06 22:41:56,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:56,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-11-06 22:41:56,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46849942726231386 [2023-11-06 22:41:56,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-11-06 22:41:56,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-11-06 22:41:56,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:56,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-11-06 22:41:56,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 22:41:56,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 22:41:56,043 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 22:41:56,043 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 100 flow. Second operand 3 states and 409 transitions. [2023-11-06 22:41:56,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 61 transitions, 260 flow [2023-11-06 22:41:56,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 256 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-06 22:41:56,048 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 106 flow [2023-11-06 22:41:56,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-11-06 22:41:56,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-11-06 22:41:56,053 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 106 flow [2023-11-06 22:41:56,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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 22:41:56,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:56,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:56,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:41:56,055 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:41:56,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash 386224727, now seen corresponding path program 1 times [2023-11-06 22:41:56,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:56,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860045404] [2023-11-06 22:41:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:56,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:56,188 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 22:41:56,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:56,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860045404] [2023-11-06 22:41:56,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860045404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:56,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:56,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:56,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545743994] [2023-11-06 22:41:56,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:56,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:41:56,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:56,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:41:56,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:41:56,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 291 [2023-11-06 22:41:56,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 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 22:41:56,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:56,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 291 [2023-11-06 22:41:56,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:57,580 INFO L124 PetriNetUnfolderBase]: 7716/10823 cut-off events. [2023-11-06 22:41:57,580 INFO L125 PetriNetUnfolderBase]: For 1279/1279 co-relation queries the response was YES. [2023-11-06 22:41:57,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23146 conditions, 10823 events. 7716/10823 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 66130 event pairs, 556 based on Foata normal form. 0/7999 useless extension candidates. Maximal degree in co-relation 22967. Up to 4449 conditions per place. [2023-11-06 22:41:57,690 INFO L140 encePairwiseOnDemand]: 283/291 looper letters, 96 selfloop transitions, 9 changer transitions 0/113 dead transitions. [2023-11-06 22:41:57,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 113 transitions, 503 flow [2023-11-06 22:41:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:41:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:41:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 666 transitions. [2023-11-06 22:41:57,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577319587628866 [2023-11-06 22:41:57,694 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 666 transitions. [2023-11-06 22:41:57,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 666 transitions. [2023-11-06 22:41:57,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:57,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 666 transitions. [2023-11-06 22:41:57,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 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 22:41:57,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 291.0) internal successors, (1746), 6 states have internal predecessors, (1746), 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 22:41:57,703 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 291.0) internal successors, (1746), 6 states have internal predecessors, (1746), 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 22:41:57,704 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 106 flow. Second operand 5 states and 666 transitions. [2023-11-06 22:41:57,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 113 transitions, 503 flow [2023-11-06 22:41:57,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 113 transitions, 493 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:41:57,712 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 171 flow [2023-11-06 22:41:57,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2023-11-06 22:41:57,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2023-11-06 22:41:57,715 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 171 flow [2023-11-06 22:41:57,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.25) internal successors, (457), 4 states have internal predecessors, (457), 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 22:41:57,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:57,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:57,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:41:57,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:41:57,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:57,720 INFO L85 PathProgramCache]: Analyzing trace with hash 556467184, now seen corresponding path program 1 times [2023-11-06 22:41:57,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:57,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136171417] [2023-11-06 22:41:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:57,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:41:57,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:57,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136171417] [2023-11-06 22:41:57,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136171417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:57,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:57,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:57,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844380201] [2023-11-06 22:41:57,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:57,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:57,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:57,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:57,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:57,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 291 [2023-11-06 22:41:57,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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 22:41:57,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:57,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 291 [2023-11-06 22:41:57,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:59,680 INFO L124 PetriNetUnfolderBase]: 9709/13839 cut-off events. [2023-11-06 22:41:59,681 INFO L125 PetriNetUnfolderBase]: For 5761/5982 co-relation queries the response was YES. [2023-11-06 22:41:59,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31887 conditions, 13839 events. 9709/13839 cut-off events. For 5761/5982 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 89453 event pairs, 4441 based on Foata normal form. 0/10596 useless extension candidates. Maximal degree in co-relation 20318. Up to 8136 conditions per place. [2023-11-06 22:41:59,816 INFO L140 encePairwiseOnDemand]: 287/291 looper letters, 65 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-11-06 22:41:59,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 75 transitions, 402 flow [2023-11-06 22:41:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-11-06 22:41:59,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46735395189003437 [2023-11-06 22:41:59,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-11-06 22:41:59,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-11-06 22:41:59,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:59,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-11-06 22:41:59,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 22:41:59,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 22:41:59,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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 22:41:59,825 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 171 flow. Second operand 3 states and 408 transitions. [2023-11-06 22:41:59,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 75 transitions, 402 flow [2023-11-06 22:41:59,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 75 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:41:59,837 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 176 flow [2023-11-06 22:41:59,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-11-06 22:41:59,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2023-11-06 22:41:59,839 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 176 flow [2023-11-06 22:41:59,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 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 22:41:59,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:59,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:59,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:41:59,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:41:59,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:59,840 INFO L85 PathProgramCache]: Analyzing trace with hash -911933917, now seen corresponding path program 1 times [2023-11-06 22:41:59,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:59,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351740962] [2023-11-06 22:41:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:59,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:41:59,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:59,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351740962] [2023-11-06 22:41:59,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351740962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:59,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402502390] [2023-11-06 22:41:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:59,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:59,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:00,001 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:00,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:42:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:00,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:42:00,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:00,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:00,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402502390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:00,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:00,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 22:42:00,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660566295] [2023-11-06 22:42:00,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:00,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:42:00,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:00,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:42:00,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:42:00,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 291 [2023-11-06 22:42:00,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 176 flow. Second operand has 8 states, 8 states have (on average 108.0) internal successors, (864), 8 states have internal predecessors, (864), 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 22:42:00,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:00,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 291 [2023-11-06 22:42:00,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:03,805 INFO L124 PetriNetUnfolderBase]: 15023/23095 cut-off events. [2023-11-06 22:42:03,805 INFO L125 PetriNetUnfolderBase]: For 10938/11022 co-relation queries the response was YES. [2023-11-06 22:42:03,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55999 conditions, 23095 events. 15023/23095 cut-off events. For 10938/11022 co-relation queries the response was YES. Maximal size of possible extension queue 1473. Compared 177336 event pairs, 4169 based on Foata normal form. 0/19221 useless extension candidates. Maximal degree in co-relation 40068. Up to 7712 conditions per place. [2023-11-06 22:42:04,142 INFO L140 encePairwiseOnDemand]: 279/291 looper letters, 232 selfloop transitions, 48 changer transitions 0/288 dead transitions. [2023-11-06 22:42:04,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 288 transitions, 1551 flow [2023-11-06 22:42:04,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:42:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:42:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1664 transitions. [2023-11-06 22:42:04,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43986254295532645 [2023-11-06 22:42:04,150 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1664 transitions. [2023-11-06 22:42:04,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1664 transitions. [2023-11-06 22:42:04,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:04,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1664 transitions. [2023-11-06 22:42:04,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 128.0) internal successors, (1664), 13 states have internal predecessors, (1664), 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 22:42:04,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 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 22:42:04,167 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 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 22:42:04,168 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 176 flow. Second operand 13 states and 1664 transitions. [2023-11-06 22:42:04,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 288 transitions, 1551 flow [2023-11-06 22:42:04,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 288 transitions, 1525 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:42:04,224 INFO L231 Difference]: Finished difference. Result has 73 places, 91 transitions, 668 flow [2023-11-06 22:42:04,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=668, PETRI_PLACES=73, PETRI_TRANSITIONS=91} [2023-11-06 22:42:04,226 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2023-11-06 22:42:04,226 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 91 transitions, 668 flow [2023-11-06 22:42:04,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 108.0) internal successors, (864), 8 states have internal predecessors, (864), 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 22:42:04,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:04,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:04,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:42:04,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:42:04,433 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:42:04,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:04,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1909574864, now seen corresponding path program 1 times [2023-11-06 22:42:04,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:04,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232076108] [2023-11-06 22:42:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:04,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:42:04,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:04,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232076108] [2023-11-06 22:42:04,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232076108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:04,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:04,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:42:04,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210193923] [2023-11-06 22:42:04,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:04,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:42:04,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:04,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:42:04,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:42:04,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 291 [2023-11-06 22:42:04,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 91 transitions, 668 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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 22:42:04,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:04,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 291 [2023-11-06 22:42:04,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:11,345 INFO L124 PetriNetUnfolderBase]: 34347/50659 cut-off events. [2023-11-06 22:42:11,345 INFO L125 PetriNetUnfolderBase]: For 166944/167586 co-relation queries the response was YES. [2023-11-06 22:42:11,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164846 conditions, 50659 events. 34347/50659 cut-off events. For 166944/167586 co-relation queries the response was YES. Maximal size of possible extension queue 3408. Compared 401883 event pairs, 7269 based on Foata normal form. 254/45285 useless extension candidates. Maximal degree in co-relation 131924. Up to 21414 conditions per place. [2023-11-06 22:42:12,132 INFO L140 encePairwiseOnDemand]: 277/291 looper letters, 230 selfloop transitions, 59 changer transitions 0/300 dead transitions. [2023-11-06 22:42:12,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 300 transitions, 2700 flow [2023-11-06 22:42:12,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:42:12,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:42:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 906 transitions. [2023-11-06 22:42:12,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44477172312223856 [2023-11-06 22:42:12,142 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 906 transitions. [2023-11-06 22:42:12,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 906 transitions. [2023-11-06 22:42:12,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:12,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 906 transitions. [2023-11-06 22:42:12,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 129.42857142857142) internal successors, (906), 7 states have internal predecessors, (906), 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 22:42:12,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 291.0) internal successors, (2328), 8 states have internal predecessors, (2328), 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 22:42:12,155 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 291.0) internal successors, (2328), 8 states have internal predecessors, (2328), 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 22:42:12,155 INFO L175 Difference]: Start difference. First operand has 73 places, 91 transitions, 668 flow. Second operand 7 states and 906 transitions. [2023-11-06 22:42:12,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 300 transitions, 2700 flow [2023-11-06 22:42:13,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 300 transitions, 2508 flow, removed 96 selfloop flow, removed 0 redundant places. [2023-11-06 22:42:13,666 INFO L231 Difference]: Finished difference. Result has 84 places, 143 transitions, 1321 flow [2023-11-06 22:42:13,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1321, PETRI_PLACES=84, PETRI_TRANSITIONS=143} [2023-11-06 22:42:13,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2023-11-06 22:42:13,668 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 143 transitions, 1321 flow [2023-11-06 22:42:13,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 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 22:42:13,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:13,669 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:13,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:42:13,669 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:42:13,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:13,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1753750185, now seen corresponding path program 2 times [2023-11-06 22:42:13,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:13,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211808551] [2023-11-06 22:42:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:13,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:13,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:13,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211808551] [2023-11-06 22:42:13,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211808551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:42:13,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807362870] [2023-11-06 22:42:13,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:42:13,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:13,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:13,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:42:13,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:42:14,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:42:14,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:42:14,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:42:14,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:42:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:14,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:42:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:42:14,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807362870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:42:14,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:42:14,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 22:42:14,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523050968] [2023-11-06 22:42:14,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:42:14,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:42:14,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:14,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:42:14,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:42:14,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 291 [2023-11-06 22:42:14,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 143 transitions, 1321 flow. Second operand has 14 states, 14 states have (on average 107.57142857142857) internal successors, (1506), 14 states have internal predecessors, (1506), 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 22:42:14,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:14,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 291 [2023-11-06 22:42:14,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:27,029 INFO L124 PetriNetUnfolderBase]: 48194/72418 cut-off events. [2023-11-06 22:42:27,029 INFO L125 PetriNetUnfolderBase]: For 373243/374439 co-relation queries the response was YES. [2023-11-06 22:42:27,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266928 conditions, 72418 events. 48194/72418 cut-off events. For 373243/374439 co-relation queries the response was YES. Maximal size of possible extension queue 3652. Compared 603878 event pairs, 9169 based on Foata normal form. 3822/68908 useless extension candidates. Maximal degree in co-relation 225380. Up to 16596 conditions per place. [2023-11-06 22:42:27,608 INFO L140 encePairwiseOnDemand]: 282/291 looper letters, 548 selfloop transitions, 143 changer transitions 0/703 dead transitions. [2023-11-06 22:42:27,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 703 transitions, 7242 flow [2023-11-06 22:42:27,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:42:27,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 22:42:27,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3175 transitions. [2023-11-06 22:42:27,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436426116838488 [2023-11-06 22:42:27,621 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3175 transitions. [2023-11-06 22:42:27,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3175 transitions. [2023-11-06 22:42:27,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:27,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3175 transitions. [2023-11-06 22:42:27,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 127.0) internal successors, (3175), 25 states have internal predecessors, (3175), 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 22:42:27,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 291.0) internal successors, (7566), 26 states have internal predecessors, (7566), 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 22:42:27,651 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 291.0) internal successors, (7566), 26 states have internal predecessors, (7566), 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 22:42:27,651 INFO L175 Difference]: Start difference. First operand has 84 places, 143 transitions, 1321 flow. Second operand 25 states and 3175 transitions. [2023-11-06 22:42:27,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 703 transitions, 7242 flow [2023-11-06 22:42:29,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 703 transitions, 7190 flow, removed 26 selfloop flow, removed 0 redundant places. [2023-11-06 22:42:29,300 INFO L231 Difference]: Finished difference. Result has 108 places, 203 transitions, 2265 flow [2023-11-06 22:42:29,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2265, PETRI_PLACES=108, PETRI_TRANSITIONS=203} [2023-11-06 22:42:29,301 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2023-11-06 22:42:29,301 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 203 transitions, 2265 flow [2023-11-06 22:42:29,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 107.57142857142857) internal successors, (1506), 14 states have internal predecessors, (1506), 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 22:42:29,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:29,303 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:42:29,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:42:29,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7774dd8-6edd-4e19-adde-4e680229e56d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:42:29,508 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:42:29,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:29,509 INFO L85 PathProgramCache]: Analyzing trace with hash -539989153, now seen corresponding path program 1 times [2023-11-06 22:42:29,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:29,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292025911] [2023-11-06 22:42:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:29,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:42:29,523 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:42:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:42:29,540 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:42:29,541 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:42:29,541 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 22:42:29,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 22:42:29,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 22:42:29,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 22:42:29,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 22:42:29,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:42:29,542 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-11-06 22:42:29,543 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:42:29,543 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 22:42:29,576 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:42:29,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 177 transitions, 382 flow [2023-11-06 22:42:29,611 INFO L124 PetriNetUnfolderBase]: 22/231 cut-off events. [2023-11-06 22:42:29,611 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:42:29,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 231 events. 22/231 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 628 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 192. Up to 10 conditions per place. [2023-11-06 22:42:29,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 177 transitions, 382 flow [2023-11-06 22:42:29,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 177 transitions, 382 flow [2023-11-06 22:42:29,615 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:42:29,615 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 177 transitions, 382 flow [2023-11-06 22:42:29,615 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 177 transitions, 382 flow [2023-11-06 22:42:29,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 177 transitions, 382 flow [2023-11-06 22:42:29,647 INFO L124 PetriNetUnfolderBase]: 22/231 cut-off events. [2023-11-06 22:42:29,648 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:42:29,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 231 events. 22/231 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 628 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 192. Up to 10 conditions per place. [2023-11-06 22:42:29,662 INFO L119 LiptonReduction]: Number of co-enabled transitions 16512 [2023-11-06 22:42:33,341 INFO L134 LiptonReduction]: Checked pairs total: 33903 [2023-11-06 22:42:33,342 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-11-06 22:42:33,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:42:33,344 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;@74970aff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:42:33,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:42:33,346 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:42:33,347 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-11-06 22:42:33,347 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:42:33,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:33,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:33,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:42:33,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:33,349 INFO L85 PathProgramCache]: Analyzing trace with hash 430597354, now seen corresponding path program 1 times [2023-11-06 22:42:33,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:33,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521070009] [2023-11-06 22:42:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:33,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:33,412 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 22:42:33,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:33,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521070009] [2023-11-06 22:42:33,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521070009] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:33,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:33,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:42:33,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022105172] [2023-11-06 22:42:33,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:33,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:42:33,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:33,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:42:33,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:42:33,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 351 [2023-11-06 22:42:33,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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 22:42:33,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:33,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 351 [2023-11-06 22:42:33,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:42:38,139 INFO L124 PetriNetUnfolderBase]: 41521/56517 cut-off events. [2023-11-06 22:42:38,139 INFO L125 PetriNetUnfolderBase]: For 10132/10132 co-relation queries the response was YES. [2023-11-06 22:42:38,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113276 conditions, 56517 events. 41521/56517 cut-off events. For 10132/10132 co-relation queries the response was YES. Maximal size of possible extension queue 2582. Compared 376247 event pairs, 18351 based on Foata normal form. 0/41564 useless extension candidates. Maximal degree in co-relation 13574. Up to 30622 conditions per place. [2023-11-06 22:42:38,385 INFO L140 encePairwiseOnDemand]: 346/351 looper letters, 70 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-11-06 22:42:38,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 82 transitions, 357 flow [2023-11-06 22:42:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:42:38,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:42:38,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-11-06 22:42:38,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48243114909781576 [2023-11-06 22:42:38,388 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-11-06 22:42:38,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-11-06 22:42:38,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:42:38,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-11-06 22:42:38,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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 22:42:38,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 22:42:38,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 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 22:42:38,394 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 134 flow. Second operand 3 states and 508 transitions. [2023-11-06 22:42:38,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 82 transitions, 357 flow [2023-11-06 22:42:38,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 82 transitions, 345 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-06 22:42:38,400 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 136 flow [2023-11-06 22:42:38,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-11-06 22:42:38,401 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-11-06 22:42:38,401 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 136 flow [2023-11-06 22:42:38,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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 22:42:38,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:42:38,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:42:38,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:42:38,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:42:38,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:42:38,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1397386978, now seen corresponding path program 1 times [2023-11-06 22:42:38,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:42:38,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082140982] [2023-11-06 22:42:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:42:38,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:42:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:42:38,496 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 22:42:38,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:42:38,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082140982] [2023-11-06 22:42:38,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082140982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:42:38,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:42:38,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:42:38,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427878544] [2023-11-06 22:42:38,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:42:38,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:42:38,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:42:38,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:42:38,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:42:38,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 351 [2023-11-06 22:42:38,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 131.8) internal successors, (659), 5 states have internal predecessors, (659), 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 22:42:38,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:42:38,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 351 [2023-11-06 22:42:38,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand