./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/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_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-complex/safestack_relacy.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/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_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/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 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:40:16,021 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:40:16,177 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:40:16,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:40:16,185 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:40:16,234 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:40:16,235 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:40:16,236 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:40:16,237 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:40:16,238 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:40:16,239 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:40:16,240 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:40:16,241 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:40:16,241 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:40:16,242 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:40:16,243 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:40:16,243 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:40:16,244 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:40:16,245 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:40:16,246 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:40:16,246 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:40:16,247 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:40:16,248 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:40:16,249 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:40:16,249 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:40:16,250 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:40:16,251 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:40:16,251 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:40:16,252 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:40:16,253 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:40:16,253 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:40:16,254 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:40:16,255 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:40:16,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:40:16,256 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:40:16,256 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:40:16,257 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:40:16,257 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:40:16,258 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:40:16,258 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_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 [2023-11-06 22:40:16,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:40:16,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:40:16,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:40:16,683 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:40:16,684 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:40:16,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-complex/safestack_relacy.i [2023-11-06 22:40:20,095 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:40:20,657 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:40:20,658 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/sv-benchmarks/c/pthread-complex/safestack_relacy.i [2023-11-06 22:40:20,705 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/data/75e074592/b25ea36de66f4db98dfb170f8ce127c1/FLAG699685be2 [2023-11-06 22:40:20,723 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/data/75e074592/b25ea36de66f4db98dfb170f8ce127c1 [2023-11-06 22:40:20,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:40:20,729 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:40:20,730 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:40:20,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:40:20,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:40:20,742 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:20" (1/1) ... [2023-11-06 22:40:20,743 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34fb5da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:20, skipping insertion in model container [2023-11-06 22:40:20,744 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:40:20" (1/1) ... [2023-11-06 22:40:20,848 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:40:22,004 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_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/sv-benchmarks/c/pthread-complex/safestack_relacy.i[78860,78873] [2023-11-06 22:40:22,015 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:40:22,035 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:40:22,115 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_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/sv-benchmarks/c/pthread-complex/safestack_relacy.i[78860,78873] [2023-11-06 22:40:22,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:40:22,288 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:40:22,288 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:40:22,298 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:40:22,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22 WrapperNode [2023-11-06 22:40:22,299 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:40:22,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:40:22,327 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:40:22,327 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:40:22,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22" (1/1) ... [2023-11-06 22:40:22,400 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22" (1/1) ... [2023-11-06 22:40:22,460 INFO L138 Inliner]: procedures = 481, calls = 74, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 285 [2023-11-06 22:40:22,460 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:40:22,461 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:40:22,461 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:40:22,462 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:40:22,475 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22" (1/1) ... [2023-11-06 22:40:22,475 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22" (1/1) ... [2023-11-06 22:40:22,483 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22" (1/1) ... [2023-11-06 22:40:22,484 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22" (1/1) ... [2023-11-06 22:40:22,515 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22" (1/1) ... [2023-11-06 22:40:22,521 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22" (1/1) ... [2023-11-06 22:40:22,528 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22" (1/1) ... [2023-11-06 22:40:22,533 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22" (1/1) ... [2023-11-06 22:40:22,543 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:40:22,544 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:40:22,544 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:40:22,544 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:40:22,546 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22" (1/1) ... [2023-11-06 22:40:22,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:40:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:22,590 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:40:22,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:40:22,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:40:22,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:40:22,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:40:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:40:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:40:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-11-06 22:40:22,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-11-06 22:40:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:40:22,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:40:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:40:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:40:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:40:22,660 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 22:40:23,056 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:40:23,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:40:23,677 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:40:23,755 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:40:23,756 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-06 22:40:23,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:40:23 BoogieIcfgContainer [2023-11-06 22:40:23,759 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:40:23,763 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:40:23,763 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:40:23,767 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:40:23,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:40:20" (1/3) ... [2023-11-06 22:40:23,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383b9f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:40:23, skipping insertion in model container [2023-11-06 22:40:23,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:40:22" (2/3) ... [2023-11-06 22:40:23,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383b9f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:40:23, skipping insertion in model container [2023-11-06 22:40:23,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:40:23" (3/3) ... [2023-11-06 22:40:23,771 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-11-06 22:40:23,783 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:40:23,796 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:40:23,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:40:23,797 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:40:23,943 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:40:24,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 281 transitions, 569 flow [2023-11-06 22:40:24,228 INFO L124 PetriNetUnfolderBase]: 19/296 cut-off events. [2023-11-06 22:40:24,229 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:40:24,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 296 events. 19/296 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 472 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 208. Up to 4 conditions per place. [2023-11-06 22:40:24,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 281 transitions, 569 flow [2023-11-06 22:40:24,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 263 places, 276 transitions, 556 flow [2023-11-06 22:40:24,272 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:40:24,296 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 263 places, 276 transitions, 556 flow [2023-11-06 22:40:24,306 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 263 places, 276 transitions, 556 flow [2023-11-06 22:40:24,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 263 places, 276 transitions, 556 flow [2023-11-06 22:40:24,459 INFO L124 PetriNetUnfolderBase]: 18/291 cut-off events. [2023-11-06 22:40:24,460 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:40:24,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 291 events. 18/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 429 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 208. Up to 4 conditions per place. [2023-11-06 22:40:24,477 INFO L119 LiptonReduction]: Number of co-enabled transitions 7896 [2023-11-06 22:40:35,890 INFO L134 LiptonReduction]: Checked pairs total: 7757 [2023-11-06 22:40:35,890 INFO L136 LiptonReduction]: Total number of compositions: 274 [2023-11-06 22:40:35,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:40:35,918 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;@2caed912, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:40:35,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:40:35,925 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:40:35,925 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-11-06 22:40:35,925 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:40:35,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:35,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-06 22:40:35,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:40:35,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:35,933 INFO L85 PathProgramCache]: Analyzing trace with hash 373893635, now seen corresponding path program 1 times [2023-11-06 22:40:35,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:35,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032609792] [2023-11-06 22:40:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:35,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:36,538 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 22:40:36,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:36,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032609792] [2023-11-06 22:40:36,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032609792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:36,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:36,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:40:36,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164815351] [2023-11-06 22:40:36,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:36,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:40:36,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:36,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:40:36,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:40:36,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 555 [2023-11-06 22:40:36,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 36 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 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 22:40:36,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:36,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 555 [2023-11-06 22:40:36,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:36,809 INFO L124 PetriNetUnfolderBase]: 82/168 cut-off events. [2023-11-06 22:40:36,810 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:40:36,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340 conditions, 168 events. 82/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 453 event pairs, 57 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 320. Up to 167 conditions per place. [2023-11-06 22:40:36,813 INFO L140 encePairwiseOnDemand]: 549/555 looper letters, 31 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-11-06 22:40:36,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 138 flow [2023-11-06 22:40:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:40:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:40:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 808 transitions. [2023-11-06 22:40:36,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852852852852853 [2023-11-06 22:40:36,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 808 transitions. [2023-11-06 22:40:36,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 808 transitions. [2023-11-06 22:40:36,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:36,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 808 transitions. [2023-11-06 22:40:36,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 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 22:40:36,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 555.0) internal successors, (2220), 4 states have internal predecessors, (2220), 0 states have call successors, (0), 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 22:40:36,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 555.0) internal successors, (2220), 4 states have internal predecessors, (2220), 0 states have call successors, (0), 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 22:40:36,884 INFO L175 Difference]: Start difference. First operand has 30 places, 36 transitions, 76 flow. Second operand 3 states and 808 transitions. [2023-11-06 22:40:36,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 138 flow [2023-11-06 22:40:36,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:40:36,892 INFO L231 Difference]: Finished difference. Result has 32 places, 34 transitions, 82 flow [2023-11-06 22:40:36,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=555, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=32, PETRI_TRANSITIONS=34} [2023-11-06 22:40:36,916 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-06 22:40:36,916 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 34 transitions, 82 flow [2023-11-06 22:40:36,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 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 22:40:36,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:36,918 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:36,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:40:36,919 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:40:36,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:36,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2064399277, now seen corresponding path program 1 times [2023-11-06 22:40:36,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:36,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024008583] [2023-11-06 22:40:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:36,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:40:37,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:37,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024008583] [2023-11-06 22:40:37,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024008583] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:37,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40977301] [2023-11-06 22:40:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:37,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:37,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:37,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:40:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:37,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:40:37,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:40:37,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:40:37,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40977301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:37,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:37,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-06 22:40:37,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189015145] [2023-11-06 22:40:37,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:37,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:40:37,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:37,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:40:37,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:40:37,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 555 [2023-11-06 22:40:37,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 256.5) internal successors, (2052), 8 states have internal predecessors, (2052), 0 states have call successors, (0), 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 22:40:37,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:37,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 555 [2023-11-06 22:40:37,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:37,838 INFO L124 PetriNetUnfolderBase]: 82/169 cut-off events. [2023-11-06 22:40:37,838 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:40:37,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 169 events. 82/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 453 event pairs, 57 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 338. Up to 167 conditions per place. [2023-11-06 22:40:37,840 INFO L140 encePairwiseOnDemand]: 552/555 looper letters, 31 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-11-06 22:40:37,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 154 flow [2023-11-06 22:40:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:40:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:40:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1055 transitions. [2023-11-06 22:40:37,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4752252252252252 [2023-11-06 22:40:37,848 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1055 transitions. [2023-11-06 22:40:37,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1055 transitions. [2023-11-06 22:40:37,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:37,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1055 transitions. [2023-11-06 22:40:37,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.75) internal successors, (1055), 4 states have internal predecessors, (1055), 0 states have call successors, (0), 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 22:40:37,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 555.0) internal successors, (2775), 5 states have internal predecessors, (2775), 0 states have call successors, (0), 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 22:40:37,867 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 555.0) internal successors, (2775), 5 states have internal predecessors, (2775), 0 states have call successors, (0), 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 22:40:37,867 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 82 flow. Second operand 4 states and 1055 transitions. [2023-11-06 22:40:37,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 154 flow [2023-11-06 22:40:37,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:40:37,871 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 94 flow [2023-11-06 22:40:37,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=555, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-11-06 22:40:37,872 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-06 22:40:37,873 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 94 flow [2023-11-06 22:40:37,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 256.5) internal successors, (2052), 8 states have internal predecessors, (2052), 0 states have call successors, (0), 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 22:40:37,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:37,876 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:40:37,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:40:38,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 22:40:38,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:40:38,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:38,085 INFO L85 PathProgramCache]: Analyzing trace with hash -342068221, now seen corresponding path program 2 times [2023-11-06 22:40:38,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:38,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148524557] [2023-11-06 22:40:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:38,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:40:38,157 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:40:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:40:38,240 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:40:38,240 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:40:38,243 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-06 22:40:38,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-06 22:40:38,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-06 22:40:38,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:40:38,252 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-11-06 22:40:38,257 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:40:38,257 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:40:38,408 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:40:38,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 446 places, 471 transitions, 958 flow [2023-11-06 22:40:38,607 INFO L124 PetriNetUnfolderBase]: 36/524 cut-off events. [2023-11-06 22:40:38,607 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:40:38,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 524 events. 36/524 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1672 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 410. Up to 8 conditions per place. [2023-11-06 22:40:38,616 INFO L82 GeneralOperation]: Start removeDead. Operand has 446 places, 471 transitions, 958 flow [2023-11-06 22:40:38,624 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 446 places, 471 transitions, 958 flow [2023-11-06 22:40:38,625 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:40:38,625 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 446 places, 471 transitions, 958 flow [2023-11-06 22:40:38,626 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 446 places, 471 transitions, 958 flow [2023-11-06 22:40:38,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 446 places, 471 transitions, 958 flow [2023-11-06 22:40:38,821 INFO L124 PetriNetUnfolderBase]: 36/524 cut-off events. [2023-11-06 22:40:38,821 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:40:38,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 524 events. 36/524 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1672 event pairs, 0 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 410. Up to 8 conditions per place. [2023-11-06 22:40:38,889 INFO L119 LiptonReduction]: Number of co-enabled transitions 90616 [2023-11-06 22:40:55,138 INFO L134 LiptonReduction]: Checked pairs total: 93509 [2023-11-06 22:40:55,138 INFO L136 LiptonReduction]: Total number of compositions: 450 [2023-11-06 22:40:55,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:40:55,143 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;@2caed912, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:40:55,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:40:55,148 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:40:55,148 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-11-06 22:40:55,148 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:40:55,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:55,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:55,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:40:55,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:55,150 INFO L85 PathProgramCache]: Analyzing trace with hash 208501698, now seen corresponding path program 1 times [2023-11-06 22:40:55,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:55,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623984682] [2023-11-06 22:40:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:55,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:55,274 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 22:40:55,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:55,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623984682] [2023-11-06 22:40:55,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623984682] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:55,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:55,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:40:55,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024468168] [2023-11-06 22:40:55,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:55,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:40:55,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:55,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:40:55,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:40:55,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 432 out of 921 [2023-11-06 22:40:55,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 81 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 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 22:40:55,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:55,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 432 of 921 [2023-11-06 22:40:55,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:40:57,561 INFO L124 PetriNetUnfolderBase]: 8734/12806 cut-off events. [2023-11-06 22:40:57,561 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-11-06 22:40:57,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25706 conditions, 12806 events. 8734/12806 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 69351 event pairs, 6840 based on Foata normal form. 0/9299 useless extension candidates. Maximal degree in co-relation 20786. Up to 12767 conditions per place. [2023-11-06 22:40:57,677 INFO L140 encePairwiseOnDemand]: 913/921 looper letters, 72 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-06 22:40:57,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 318 flow [2023-11-06 22:40:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:40:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:40:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1376 transitions. [2023-11-06 22:40:57,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980094100615273 [2023-11-06 22:40:57,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1376 transitions. [2023-11-06 22:40:57,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1376 transitions. [2023-11-06 22:40:57,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:40:57,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1376 transitions. [2023-11-06 22:40:57,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 458.6666666666667) internal successors, (1376), 3 states have internal predecessors, (1376), 0 states have call successors, (0), 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 22:40:57,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 921.0) internal successors, (3684), 4 states have internal predecessors, (3684), 0 states have call successors, (0), 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 22:40:57,706 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 921.0) internal successors, (3684), 4 states have internal predecessors, (3684), 0 states have call successors, (0), 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 22:40:57,706 INFO L175 Difference]: Start difference. First operand has 66 places, 81 transitions, 178 flow. Second operand 3 states and 1376 transitions. [2023-11-06 22:40:57,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 318 flow [2023-11-06 22:40:57,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 77 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:40:57,714 INFO L231 Difference]: Finished difference. Result has 69 places, 77 transitions, 180 flow [2023-11-06 22:40:57,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=921, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=69, PETRI_TRANSITIONS=77} [2023-11-06 22:40:57,719 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-11-06 22:40:57,719 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 77 transitions, 180 flow [2023-11-06 22:40:57,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 434.6666666666667) internal successors, (1304), 3 states have internal predecessors, (1304), 0 states have call successors, (0), 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 22:40:57,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:40:57,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:57,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:40:57,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:40:57,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash 94632861, now seen corresponding path program 1 times [2023-11-06 22:40:57,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:57,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798286977] [2023-11-06 22:40:57,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:57,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:57,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:40:57,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:57,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798286977] [2023-11-06 22:40:57,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798286977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:40:57,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:40:57,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:40:57,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517634666] [2023-11-06 22:40:57,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:40:57,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:40:57,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:57,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:40:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:40:57,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 436 out of 921 [2023-11-06 22:40:57,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 77 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 439.6666666666667) internal successors, (1319), 3 states have internal predecessors, (1319), 0 states have call successors, (0), 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 22:40:57,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:40:57,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 436 of 921 [2023-11-06 22:40:57,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:00,252 INFO L124 PetriNetUnfolderBase]: 9047/13268 cut-off events. [2023-11-06 22:41:00,252 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-11-06 22:41:00,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26649 conditions, 13268 events. 9047/13268 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 69235 event pairs, 6840 based on Foata normal form. 0/9667 useless extension candidates. Maximal degree in co-relation 26636. Up to 12768 conditions per place. [2023-11-06 22:41:00,357 INFO L140 encePairwiseOnDemand]: 918/921 looper letters, 111 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2023-11-06 22:41:00,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 492 flow [2023-11-06 22:41:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:41:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:41:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1421 transitions. [2023-11-06 22:41:00,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142960550126674 [2023-11-06 22:41:00,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1421 transitions. [2023-11-06 22:41:00,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1421 transitions. [2023-11-06 22:41:00,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:00,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1421 transitions. [2023-11-06 22:41:00,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 473.6666666666667) internal successors, (1421), 3 states have internal predecessors, (1421), 0 states have call successors, (0), 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 22:41:00,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 921.0) internal successors, (3684), 4 states have internal predecessors, (3684), 0 states have call successors, (0), 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 22:41:00,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 921.0) internal successors, (3684), 4 states have internal predecessors, (3684), 0 states have call successors, (0), 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 22:41:00,387 INFO L175 Difference]: Start difference. First operand has 69 places, 77 transitions, 180 flow. Second operand 3 states and 1421 transitions. [2023-11-06 22:41:00,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 492 flow [2023-11-06 22:41:00,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 116 transitions, 488 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:41:00,394 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 188 flow [2023-11-06 22:41:00,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=921, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2023-11-06 22:41:00,397 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2023-11-06 22:41:00,397 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 188 flow [2023-11-06 22:41:00,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 439.6666666666667) internal successors, (1319), 3 states have internal predecessors, (1319), 0 states have call successors, (0), 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 22:41:00,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:00,399 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:00,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:41:00,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:41:00,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:00,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1393029193, now seen corresponding path program 1 times [2023-11-06 22:41:00,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:00,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762902461] [2023-11-06 22:41:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:00,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:41:00,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:00,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762902461] [2023-11-06 22:41:00,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762902461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:41:00,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127608415] [2023-11-06 22:41:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:00,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:41:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:41:00,574 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:41:00,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:41:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:00,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:41:00,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:41:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:41:00,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:41:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:41:00,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127608415] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:41:00,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:41:00,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-06 22:41:00,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866306839] [2023-11-06 22:41:00,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:41:00,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:41:00,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:00,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:41:00,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:41:00,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 430 out of 921 [2023-11-06 22:41:00,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 188 flow. Second operand has 8 states, 8 states have (on average 431.625) internal successors, (3453), 8 states have internal predecessors, (3453), 0 states have call successors, (0), 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 22:41:00,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:00,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 430 of 921 [2023-11-06 22:41:00,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:41:03,034 INFO L124 PetriNetUnfolderBase]: 9047/13270 cut-off events. [2023-11-06 22:41:03,034 INFO L125 PetriNetUnfolderBase]: For 888/888 co-relation queries the response was YES. [2023-11-06 22:41:03,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27437 conditions, 13270 events. 9047/13270 cut-off events. For 888/888 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 68960 event pairs, 7116 based on Foata normal form. 0/9826 useless extension candidates. Maximal degree in co-relation 27416. Up to 13237 conditions per place. [2023-11-06 22:41:03,111 INFO L140 encePairwiseOnDemand]: 918/921 looper letters, 73 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-11-06 22:41:03,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 79 transitions, 344 flow [2023-11-06 22:41:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:41:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:41:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1796 transitions. [2023-11-06 22:41:03,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48751357220412594 [2023-11-06 22:41:03,121 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1796 transitions. [2023-11-06 22:41:03,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1796 transitions. [2023-11-06 22:41:03,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:41:03,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1796 transitions. [2023-11-06 22:41:03,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 449.0) internal successors, (1796), 4 states have internal predecessors, (1796), 0 states have call successors, (0), 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 22:41:03,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 921.0) internal successors, (4605), 5 states have internal predecessors, (4605), 0 states have call successors, (0), 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 22:41:03,146 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 921.0) internal successors, (4605), 5 states have internal predecessors, (4605), 0 states have call successors, (0), 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 22:41:03,147 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 188 flow. Second operand 4 states and 1796 transitions. [2023-11-06 22:41:03,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 79 transitions, 344 flow [2023-11-06 22:41:03,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 79 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:41:03,157 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 202 flow [2023-11-06 22:41:03,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=921, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2023-11-06 22:41:03,159 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 8 predicate places. [2023-11-06 22:41:03,159 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 202 flow [2023-11-06 22:41:03,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 431.625) internal successors, (3453), 8 states have internal predecessors, (3453), 0 states have call successors, (0), 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 22:41:03,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:03,162 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-06 22:41:03,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:41:03,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6a03250-33b4-4ca7-9e5a-810a8714f9e8/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:41:03,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:41:03,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1879652862, now seen corresponding path program 2 times [2023-11-06 22:41:03,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:03,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136694000] [2023-11-06 22:41:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:41:03,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:41:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:41:03,448 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:41:03,449 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:41:03,449 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-06 22:41:03,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-06 22:41:03,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-06 22:41:03,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-06 22:41:03,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:41:03,453 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2023-11-06 22:41:03,454 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:41:03,456 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:41:03,580 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:41:03,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 625 places, 661 transitions, 1349 flow [2023-11-06 22:41:04,059 INFO L124 PetriNetUnfolderBase]: 58/781 cut-off events. [2023-11-06 22:41:04,059 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:41:04,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 781 events. 58/781 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3360 event pairs, 1 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 628. Up to 16 conditions per place. [2023-11-06 22:41:04,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 625 places, 661 transitions, 1349 flow [2023-11-06 22:41:04,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 625 places, 661 transitions, 1349 flow [2023-11-06 22:41:04,081 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:41:04,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 625 places, 661 transitions, 1349 flow [2023-11-06 22:41:04,082 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 625 places, 661 transitions, 1349 flow [2023-11-06 22:41:04,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 625 places, 661 transitions, 1349 flow [2023-11-06 22:41:04,395 INFO L124 PetriNetUnfolderBase]: 58/781 cut-off events. [2023-11-06 22:41:04,396 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:41:04,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 781 events. 58/781 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3360 event pairs, 1 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 628. Up to 16 conditions per place. [2023-11-06 22:41:04,528 INFO L119 LiptonReduction]: Number of co-enabled transitions 243648 [2023-11-06 22:41:26,721 INFO L134 LiptonReduction]: Checked pairs total: 263415 [2023-11-06 22:41:26,721 INFO L136 LiptonReduction]: Total number of compositions: 636 [2023-11-06 22:41:26,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:41:26,728 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;@2caed912, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:41:26,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:41:26,733 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:41:26,734 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-11-06 22:41:26,734 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:41:26,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:41:26,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:41:26,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, threadErr0ASSERT_VIOLATIONERROR_FUNCTION, threadErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:41:26,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:41:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1865615126, now seen corresponding path program 1 times [2023-11-06 22:41:26,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:41:26,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924717296] [2023-11-06 22:41:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:41:26,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:41:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:41:26,855 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 22:41:26,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:41:26,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924717296] [2023-11-06 22:41:26,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924717296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:41:26,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:41:26,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:41:26,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317041869] [2023-11-06 22:41:26,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:41:26,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:41:26,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:41:26,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:41:26,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:41:26,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 607 out of 1297 [2023-11-06 22:41:26,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 116 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 609.6666666666666) internal successors, (1829), 3 states have internal predecessors, (1829), 0 states have call successors, (0), 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 22:41:26,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:41:26,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 607 of 1297 [2023-11-06 22:41:26,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand