./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-deagle/arithmetic_prog_ok.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_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/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_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-deagle/arithmetic_prog_ok.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/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_8e561549-a802-4819-9369-993d3184a1ad/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 29016034e4102bf62d4fcba069301a54da1d77dfd5739e4cf52e395ddaa22e38 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:02:36,571 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:02:36,694 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:02:36,705 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:02:36,708 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:02:36,752 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:02:36,754 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:02:36,755 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:02:36,756 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:02:36,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:02:36,763 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:02:36,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:02:36,765 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:02:36,767 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:02:36,767 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:02:36,768 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:02:36,768 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:02:36,769 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:02:36,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:02:36,770 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:02:36,770 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:02:36,771 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:02:36,772 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:02:36,772 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:02:36,773 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:02:36,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:02:36,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:02:36,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:02:36,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:02:36,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:02:36,778 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:02:36,778 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:02:36,778 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:02:36,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:02:36,779 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:02:36,779 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:02:36,780 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:02:36,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:02:36,780 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:02:36,781 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_8e561549-a802-4819-9369-993d3184a1ad/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29016034e4102bf62d4fcba069301a54da1d77dfd5739e4cf52e395ddaa22e38 [2023-11-06 23:02:37,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:02:37,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:02:37,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:02:37,141 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:02:37,142 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:02:37,143 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-deagle/arithmetic_prog_ok.i [2023-11-06 23:02:40,307 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:02:40,629 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:02:40,629 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/sv-benchmarks/c/pthread-deagle/arithmetic_prog_ok.i [2023-11-06 23:02:40,658 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/data/0dc2a93a0/5f65d03490a44209a529aef692ad989f/FLAGf0a73b27f [2023-11-06 23:02:40,672 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/data/0dc2a93a0/5f65d03490a44209a529aef692ad989f [2023-11-06 23:02:40,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:02:40,681 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:02:40,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:02:40,687 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:02:40,692 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:02:40,695 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:40" (1/1) ... [2023-11-06 23:02:40,696 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7649a2e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:40, skipping insertion in model container [2023-11-06 23:02:40,696 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:40" (1/1) ... [2023-11-06 23:02:40,765 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:02:41,234 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_8e561549-a802-4819-9369-993d3184a1ad/sv-benchmarks/c/pthread-deagle/arithmetic_prog_ok.i[39757,39770] [2023-11-06 23:02:41,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:02:41,254 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:02:41,323 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_8e561549-a802-4819-9369-993d3184a1ad/sv-benchmarks/c/pthread-deagle/arithmetic_prog_ok.i[39757,39770] [2023-11-06 23:02:41,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:02:41,421 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:02:41,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41 WrapperNode [2023-11-06 23:02:41,422 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:02:41,423 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:02:41,423 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:02:41,423 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:02:41,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41" (1/1) ... [2023-11-06 23:02:41,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41" (1/1) ... [2023-11-06 23:02:41,475 INFO L138 Inliner]: procedures = 243, calls = 50, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2023-11-06 23:02:41,475 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:02:41,476 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:02:41,476 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:02:41,476 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:02:41,486 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41" (1/1) ... [2023-11-06 23:02:41,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41" (1/1) ... [2023-11-06 23:02:41,492 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41" (1/1) ... [2023-11-06 23:02:41,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41" (1/1) ... [2023-11-06 23:02:41,501 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41" (1/1) ... [2023-11-06 23:02:41,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41" (1/1) ... [2023-11-06 23:02:41,507 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41" (1/1) ... [2023-11-06 23:02:41,509 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41" (1/1) ... [2023-11-06 23:02:41,513 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:02:41,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:02:41,514 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:02:41,514 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:02:41,515 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41" (1/1) ... [2023-11-06 23:02:41,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:02:41,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:41,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:02:41,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:02:41,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:02:41,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:02:41,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 23:02:41,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:02:41,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:02:41,606 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:02:41,606 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:02:41,607 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:02:41,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:02:41,608 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 23:02:41,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:02:41,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:02:41,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:02:41,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:02:41,613 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 23:02:41,819 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:02:41,822 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:02:42,172 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:02:42,182 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:02:42,182 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 23:02:42,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:42 BoogieIcfgContainer [2023-11-06 23:02:42,185 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:02:42,188 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:02:42,188 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:02:42,191 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:02:42,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:02:40" (1/3) ... [2023-11-06 23:02:42,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e1baa52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:42, skipping insertion in model container [2023-11-06 23:02:42,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:41" (2/3) ... [2023-11-06 23:02:42,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e1baa52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:42, skipping insertion in model container [2023-11-06 23:02:42,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:42" (3/3) ... [2023-11-06 23:02:42,195 INFO L112 eAbstractionObserver]: Analyzing ICFG arithmetic_prog_ok.i [2023-11-06 23:02:42,204 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:02:42,216 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:02:42,217 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:02:42,217 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:02:42,322 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:02:42,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 131 transitions, 276 flow [2023-11-06 23:02:42,450 INFO L124 PetriNetUnfolderBase]: 10/129 cut-off events. [2023-11-06 23:02:42,450 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:02:42,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 10/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 140 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 81. Up to 3 conditions per place. [2023-11-06 23:02:42,458 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 131 transitions, 276 flow [2023-11-06 23:02:42,464 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 117 transitions, 246 flow [2023-11-06 23:02:42,469 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:02:42,480 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 116 places, 117 transitions, 246 flow [2023-11-06 23:02:42,483 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 116 places, 117 transitions, 246 flow [2023-11-06 23:02:42,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 117 transitions, 246 flow [2023-11-06 23:02:42,539 INFO L124 PetriNetUnfolderBase]: 8/117 cut-off events. [2023-11-06 23:02:42,540 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:02:42,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 8/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-11-06 23:02:42,544 INFO L119 LiptonReduction]: Number of co-enabled transitions 1922 [2023-11-06 23:02:51,221 INFO L134 LiptonReduction]: Checked pairs total: 4363 [2023-11-06 23:02:51,221 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-11-06 23:02:51,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:02:51,264 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;@cc5a244, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:02:51,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 23:02:51,287 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:02:51,289 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2023-11-06 23:02:51,289 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:02:51,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:51,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:51,291 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:51,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:51,296 INFO L85 PathProgramCache]: Analyzing trace with hash -322957153, now seen corresponding path program 1 times [2023-11-06 23:02:51,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:51,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663195390] [2023-11-06 23:02:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:51,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:51,681 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 23:02:51,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:51,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663195390] [2023-11-06 23:02:51,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663195390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:51,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:51,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:02:51,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202513385] [2023-11-06 23:02:51,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:51,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:51,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:51,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:51,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:51,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 223 [2023-11-06 23:02:51,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 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 23:02:51,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:51,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 223 [2023-11-06 23:02:51,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:51,910 INFO L124 PetriNetUnfolderBase]: 219/470 cut-off events. [2023-11-06 23:02:51,911 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-06 23:02:51,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 470 events. 219/470 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2196 event pairs, 87 based on Foata normal form. 28/432 useless extension candidates. Maximal degree in co-relation 772. Up to 225 conditions per place. [2023-11-06 23:02:51,918 INFO L140 encePairwiseOnDemand]: 219/223 looper letters, 34 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-06 23:02:51,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 173 flow [2023-11-06 23:02:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-11-06 23:02:51,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829596412556054 [2023-11-06 23:02:51,936 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-11-06 23:02:51,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-11-06 23:02:51,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:51,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-11-06 23:02:51,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 23:02:51,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 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 23:02:51,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 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 23:02:51,955 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 72 flow. Second operand 3 states and 390 transitions. [2023-11-06 23:02:51,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 173 flow [2023-11-06 23:02:51,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 163 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 23:02:51,961 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 74 flow [2023-11-06 23:02:51,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2023-11-06 23:02:51,968 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-11-06 23:02:51,968 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 74 flow [2023-11-06 23:02:51,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 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 23:02:51,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:51,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:51,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:02:51,970 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:51,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:51,970 INFO L85 PathProgramCache]: Analyzing trace with hash -613287299, now seen corresponding path program 1 times [2023-11-06 23:02:51,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:51,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598358353] [2023-11-06 23:02:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:51,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:52,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:52,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598358353] [2023-11-06 23:02:52,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598358353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:52,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:52,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:02:52,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324620733] [2023-11-06 23:02:52,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:52,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:52,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:52,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:52,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 223 [2023-11-06 23:02:52,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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 23:02:52,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:52,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 223 [2023-11-06 23:02:52,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:52,383 INFO L124 PetriNetUnfolderBase]: 357/694 cut-off events. [2023-11-06 23:02:52,384 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2023-11-06 23:02:52,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1373 conditions, 694 events. 357/694 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3192 event pairs, 141 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 442. Up to 347 conditions per place. [2023-11-06 23:02:52,393 INFO L140 encePairwiseOnDemand]: 220/223 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-06 23:02:52,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 45 transitions, 191 flow [2023-11-06 23:02:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:52,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:52,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-11-06 23:02:52,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799701046337817 [2023-11-06 23:02:52,400 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-11-06 23:02:52,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-11-06 23:02:52,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:52,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-11-06 23:02:52,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 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 23:02:52,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 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 23:02:52,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 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 23:02:52,411 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 74 flow. Second operand 3 states and 388 transitions. [2023-11-06 23:02:52,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 45 transitions, 191 flow [2023-11-06 23:02:52,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:52,414 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 84 flow [2023-11-06 23:02:52,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-11-06 23:02:52,416 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2023-11-06 23:02:52,417 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 84 flow [2023-11-06 23:02:52,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 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 23:02:52,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:52,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:52,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:02:52,424 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:52,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:52,426 INFO L85 PathProgramCache]: Analyzing trace with hash 712664101, now seen corresponding path program 1 times [2023-11-06 23:02:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:52,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311377149] [2023-11-06 23:02:52,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:52,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:52,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:52,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311377149] [2023-11-06 23:02:52,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311377149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:52,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:52,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:02:52,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775872071] [2023-11-06 23:02:52,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:52,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:52,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:52,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:52,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:52,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 223 [2023-11-06 23:02:52,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 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 23:02:52,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:52,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 223 [2023-11-06 23:02:52,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:52,884 INFO L124 PetriNetUnfolderBase]: 309/688 cut-off events. [2023-11-06 23:02:52,885 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-11-06 23:02:52,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 688 events. 309/688 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3367 event pairs, 105 based on Foata normal form. 80/740 useless extension candidates. Maximal degree in co-relation 413. Up to 316 conditions per place. [2023-11-06 23:02:52,892 INFO L140 encePairwiseOnDemand]: 215/223 looper letters, 25 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-11-06 23:02:52,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 183 flow [2023-11-06 23:02:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-11-06 23:02:52,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5530642750373692 [2023-11-06 23:02:52,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-11-06 23:02:52,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-11-06 23:02:52,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:52,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-11-06 23:02:52,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 23:02:52,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 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 23:02:52,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 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 23:02:52,901 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 84 flow. Second operand 3 states and 370 transitions. [2023-11-06 23:02:52,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 183 flow [2023-11-06 23:02:52,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:52,906 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 102 flow [2023-11-06 23:02:52,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-11-06 23:02:52,907 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-11-06 23:02:52,908 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 102 flow [2023-11-06 23:02:52,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 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 23:02:52,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:52,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:52,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:02:52,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:52,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:52,910 INFO L85 PathProgramCache]: Analyzing trace with hash 587829327, now seen corresponding path program 2 times [2023-11-06 23:02:52,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:52,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145831210] [2023-11-06 23:02:52,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:52,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:53,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:53,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145831210] [2023-11-06 23:02:53,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145831210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:53,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824003935] [2023-11-06 23:02:53,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:02:53,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:53,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:53,053 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:53,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:02:53,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:02:53,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:53,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:02:53,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:53,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:53,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824003935] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:53,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:53,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-06 23:02:53,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285608314] [2023-11-06 23:02:53,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:53,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:02:53,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:02:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:02:53,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 223 [2023-11-06 23:02:53,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 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 23:02:53,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:53,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 223 [2023-11-06 23:02:53,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:53,973 INFO L124 PetriNetUnfolderBase]: 631/1544 cut-off events. [2023-11-06 23:02:53,973 INFO L125 PetriNetUnfolderBase]: For 432/438 co-relation queries the response was YES. [2023-11-06 23:02:53,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3485 conditions, 1544 events. 631/1544 cut-off events. For 432/438 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 8646 event pairs, 42 based on Foata normal form. 134/1608 useless extension candidates. Maximal degree in co-relation 843. Up to 306 conditions per place. [2023-11-06 23:02:53,987 INFO L140 encePairwiseOnDemand]: 216/223 looper letters, 141 selfloop transitions, 33 changer transitions 0/181 dead transitions. [2023-11-06 23:02:53,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 181 transitions, 978 flow [2023-11-06 23:02:53,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:02:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:02:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1980 transitions. [2023-11-06 23:02:53,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554932735426009 [2023-11-06 23:02:53,996 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1980 transitions. [2023-11-06 23:02:53,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1980 transitions. [2023-11-06 23:02:53,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:53,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1980 transitions. [2023-11-06 23:02:54,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 123.75) internal successors, (1980), 16 states have internal predecessors, (1980), 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 23:02:54,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 223.0) internal successors, (3791), 17 states have internal predecessors, (3791), 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 23:02:54,019 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 223.0) internal successors, (3791), 17 states have internal predecessors, (3791), 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 23:02:54,020 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 102 flow. Second operand 16 states and 1980 transitions. [2023-11-06 23:02:54,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 181 transitions, 978 flow [2023-11-06 23:02:54,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 181 transitions, 892 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:54,029 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 388 flow [2023-11-06 23:02:54,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=388, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2023-11-06 23:02:54,030 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 29 predicate places. [2023-11-06 23:02:54,030 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 388 flow [2023-11-06 23:02:54,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 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 23:02:54,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:54,032 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:54,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:54,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:54,238 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:54,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2075574699, now seen corresponding path program 3 times [2023-11-06 23:02:54,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:54,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377998422] [2023-11-06 23:02:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:54,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-06 23:02:54,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:54,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377998422] [2023-11-06 23:02:54,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377998422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:54,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577041899] [2023-11-06 23:02:54,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:02:54,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:54,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:54,440 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:54,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:02:54,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:02:54,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:54,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:02:54,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-06 23:02:54,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:02:54,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577041899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:54,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:02:54,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-06 23:02:54,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047306620] [2023-11-06 23:02:54,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:54,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:02:54,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:54,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:02:54,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:02:54,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 223 [2023-11-06 23:02:54,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 388 flow. Second operand has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 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 23:02:54,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:54,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 223 [2023-11-06 23:02:54,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:55,121 INFO L124 PetriNetUnfolderBase]: 977/2068 cut-off events. [2023-11-06 23:02:55,121 INFO L125 PetriNetUnfolderBase]: For 5067/5067 co-relation queries the response was YES. [2023-11-06 23:02:55,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6004 conditions, 2068 events. 977/2068 cut-off events. For 5067/5067 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 11076 event pairs, 191 based on Foata normal form. 0/1904 useless extension candidates. Maximal degree in co-relation 4606. Up to 785 conditions per place. [2023-11-06 23:02:55,142 INFO L140 encePairwiseOnDemand]: 215/223 looper letters, 98 selfloop transitions, 8 changer transitions 1/110 dead transitions. [2023-11-06 23:02:55,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 902 flow [2023-11-06 23:02:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:02:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:02:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 618 transitions. [2023-11-06 23:02:55,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5542600896860986 [2023-11-06 23:02:55,146 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 618 transitions. [2023-11-06 23:02:55,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 618 transitions. [2023-11-06 23:02:55,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:55,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 618 transitions. [2023-11-06 23:02:55,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 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 23:02:55,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 223.0) internal successors, (1338), 6 states have internal predecessors, (1338), 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 23:02:55,152 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 223.0) internal successors, (1338), 6 states have internal predecessors, (1338), 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 23:02:55,152 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 388 flow. Second operand 5 states and 618 transitions. [2023-11-06 23:02:55,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 902 flow [2023-11-06 23:02:55,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 110 transitions, 835 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:55,171 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 398 flow [2023-11-06 23:02:55,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2023-11-06 23:02:55,172 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 35 predicate places. [2023-11-06 23:02:55,172 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 398 flow [2023-11-06 23:02:55,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.4) internal successors, (582), 5 states have internal predecessors, (582), 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 23:02:55,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:55,173 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:55,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:55,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:55,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:55,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash 474697355, now seen corresponding path program 4 times [2023-11-06 23:02:55,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:55,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528079215] [2023-11-06 23:02:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:55,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 23:02:55,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:55,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528079215] [2023-11-06 23:02:55,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528079215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:55,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711817147] [2023-11-06 23:02:55,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:02:55,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:55,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:55,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:55,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:02:55,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:02:55,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:55,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:02:55,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 23:02:55,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 23:02:55,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711817147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:55,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:55,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-11-06 23:02:55,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023940063] [2023-11-06 23:02:55,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:55,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:02:55,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:55,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:02:55,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:02:55,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 223 [2023-11-06 23:02:55,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 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 23:02:55,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:55,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 223 [2023-11-06 23:02:55,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:56,332 INFO L124 PetriNetUnfolderBase]: 1019/2398 cut-off events. [2023-11-06 23:02:56,333 INFO L125 PetriNetUnfolderBase]: For 7109/7133 co-relation queries the response was YES. [2023-11-06 23:02:56,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7400 conditions, 2398 events. 1019/2398 cut-off events. For 7109/7133 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 14058 event pairs, 168 based on Foata normal form. 118/2506 useless extension candidates. Maximal degree in co-relation 6062. Up to 436 conditions per place. [2023-11-06 23:02:56,356 INFO L140 encePairwiseOnDemand]: 219/223 looper letters, 95 selfloop transitions, 17 changer transitions 0/123 dead transitions. [2023-11-06 23:02:56,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 123 transitions, 976 flow [2023-11-06 23:02:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:02:56,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:02:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 767 transitions. [2023-11-06 23:02:56,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5732436472346786 [2023-11-06 23:02:56,360 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 767 transitions. [2023-11-06 23:02:56,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 767 transitions. [2023-11-06 23:02:56,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:56,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 767 transitions. [2023-11-06 23:02:56,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.83333333333333) internal successors, (767), 6 states have internal predecessors, (767), 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 23:02:56,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 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 23:02:56,367 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 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 23:02:56,367 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 398 flow. Second operand 6 states and 767 transitions. [2023-11-06 23:02:56,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 123 transitions, 976 flow [2023-11-06 23:02:56,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 123 transitions, 976 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 23:02:56,385 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 469 flow [2023-11-06 23:02:56,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2023-11-06 23:02:56,388 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 43 predicate places. [2023-11-06 23:02:56,388 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 469 flow [2023-11-06 23:02:56,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 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 23:02:56,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:56,389 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:56,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:56,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:02:56,595 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:56,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:56,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1031935777, now seen corresponding path program 5 times [2023-11-06 23:02:56,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:56,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717937268] [2023-11-06 23:02:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:56,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-06 23:02:56,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:56,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717937268] [2023-11-06 23:02:56,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717937268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:56,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:56,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:56,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555737560] [2023-11-06 23:02:56,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:56,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:56,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:56,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:56,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:56,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 223 [2023-11-06 23:02:56,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 469 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 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 23:02:56,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:56,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 223 [2023-11-06 23:02:56,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:57,056 INFO L124 PetriNetUnfolderBase]: 748/1739 cut-off events. [2023-11-06 23:02:57,056 INFO L125 PetriNetUnfolderBase]: For 5925/5933 co-relation queries the response was YES. [2023-11-06 23:02:57,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5990 conditions, 1739 events. 748/1739 cut-off events. For 5925/5933 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 9454 event pairs, 193 based on Foata normal form. 80/1810 useless extension candidates. Maximal degree in co-relation 5231. Up to 1150 conditions per place. [2023-11-06 23:02:57,076 INFO L140 encePairwiseOnDemand]: 218/223 looper letters, 53 selfloop transitions, 3 changer transitions 3/65 dead transitions. [2023-11-06 23:02:57,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 65 transitions, 536 flow [2023-11-06 23:02:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-11-06 23:02:57,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5695067264573991 [2023-11-06 23:02:57,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-11-06 23:02:57,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-11-06 23:02:57,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:57,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-11-06 23:02:57,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:57,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 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 23:02:57,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 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 23:02:57,084 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 469 flow. Second operand 3 states and 381 transitions. [2023-11-06 23:02:57,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 65 transitions, 536 flow [2023-11-06 23:02:57,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 65 transitions, 508 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-11-06 23:02:57,102 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 336 flow [2023-11-06 23:02:57,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-11-06 23:02:57,103 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2023-11-06 23:02:57,103 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 336 flow [2023-11-06 23:02:57,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 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 23:02:57,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:57,104 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:57,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:02:57,105 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:57,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:57,105 INFO L85 PathProgramCache]: Analyzing trace with hash 115776417, now seen corresponding path program 6 times [2023-11-06 23:02:57,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:57,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272759758] [2023-11-06 23:02:57,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:57,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 39 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-06 23:02:57,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:57,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272759758] [2023-11-06 23:02:57,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272759758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:57,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491935348] [2023-11-06 23:02:57,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:02:57,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:57,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:57,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:57,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:02:57,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 23:02:57,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:57,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:02:57,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-06 23:02:57,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:02:57,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491935348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:57,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:02:57,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2023-11-06 23:02:57,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297970242] [2023-11-06 23:02:57,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:57,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:02:57,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:57,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:02:57,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:02:57,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 223 [2023-11-06 23:02:57,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 336 flow. Second operand has 6 states, 6 states have (on average 114.83333333333333) internal successors, (689), 6 states have internal predecessors, (689), 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 23:02:57,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:57,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 223 [2023-11-06 23:02:57,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:58,020 INFO L124 PetriNetUnfolderBase]: 709/1544 cut-off events. [2023-11-06 23:02:58,021 INFO L125 PetriNetUnfolderBase]: For 3668/3668 co-relation queries the response was YES. [2023-11-06 23:02:58,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 1544 events. 709/1544 cut-off events. For 3668/3668 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7322 event pairs, 185 based on Foata normal form. 34/1578 useless extension candidates. Maximal degree in co-relation 3165. Up to 668 conditions per place. [2023-11-06 23:02:58,035 INFO L140 encePairwiseOnDemand]: 214/223 looper letters, 69 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2023-11-06 23:02:58,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 652 flow [2023-11-06 23:02:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:02:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:02:58,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 708 transitions. [2023-11-06 23:02:58,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291479820627802 [2023-11-06 23:02:58,039 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 708 transitions. [2023-11-06 23:02:58,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 708 transitions. [2023-11-06 23:02:58,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:58,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 708 transitions. [2023-11-06 23:02:58,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.0) internal successors, (708), 6 states have internal predecessors, (708), 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 23:02:58,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 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 23:02:58,047 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 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 23:02:58,047 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 336 flow. Second operand 6 states and 708 transitions. [2023-11-06 23:02:58,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 652 flow [2023-11-06 23:02:58,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 81 transitions, 646 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:58,058 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 380 flow [2023-11-06 23:02:58,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=380, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2023-11-06 23:02:58,061 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 41 predicate places. [2023-11-06 23:02:58,062 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 380 flow [2023-11-06 23:02:58,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 114.83333333333333) internal successors, (689), 6 states have internal predecessors, (689), 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 23:02:58,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:58,063 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:58,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:58,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:58,270 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:58,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:58,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2032382743, now seen corresponding path program 7 times [2023-11-06 23:02:58,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:58,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648796304] [2023-11-06 23:02:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:58,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:58,697 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-06 23:02:58,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:58,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648796304] [2023-11-06 23:02:58,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648796304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:58,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447923777] [2023-11-06 23:02:58,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:02:58,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:58,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:58,699 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:58,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:02:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:58,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:02:58,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-06 23:02:58,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-06 23:02:59,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447923777] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:59,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:59,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-11-06 23:02:59,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189227263] [2023-11-06 23:02:59,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:59,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:02:59,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:59,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:02:59,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:02:59,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 223 [2023-11-06 23:02:59,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 114.5) internal successors, (687), 6 states have internal predecessors, (687), 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 23:02:59,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:59,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 223 [2023-11-06 23:02:59,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:59,330 INFO L124 PetriNetUnfolderBase]: 375/832 cut-off events. [2023-11-06 23:02:59,330 INFO L125 PetriNetUnfolderBase]: For 2487/2487 co-relation queries the response was YES. [2023-11-06 23:02:59,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3107 conditions, 832 events. 375/832 cut-off events. For 2487/2487 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2946 event pairs, 104 based on Foata normal form. 28/860 useless extension candidates. Maximal degree in co-relation 1449. Up to 351 conditions per place. [2023-11-06 23:02:59,339 INFO L140 encePairwiseOnDemand]: 216/223 looper letters, 61 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2023-11-06 23:02:59,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 586 flow [2023-11-06 23:02:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:02:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:02:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 706 transitions. [2023-11-06 23:02:59,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276532137518685 [2023-11-06 23:02:59,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 706 transitions. [2023-11-06 23:02:59,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 706 transitions. [2023-11-06 23:02:59,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:59,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 706 transitions. [2023-11-06 23:02:59,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 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 23:02:59,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 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 23:02:59,350 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 223.0) internal successors, (1561), 7 states have internal predecessors, (1561), 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 23:02:59,351 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 380 flow. Second operand 6 states and 706 transitions. [2023-11-06 23:02:59,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 586 flow [2023-11-06 23:02:59,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 530 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-11-06 23:02:59,359 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 283 flow [2023-11-06 23:02:59,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=283, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2023-11-06 23:02:59,360 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 37 predicate places. [2023-11-06 23:02:59,360 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 283 flow [2023-11-06 23:02:59,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 114.5) internal successors, (687), 6 states have internal predecessors, (687), 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 23:02:59,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:59,361 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:59,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:59,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:59,568 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:59,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:59,569 INFO L85 PathProgramCache]: Analyzing trace with hash -66906689, now seen corresponding path program 8 times [2023-11-06 23:02:59,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:59,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495307428] [2023-11-06 23:02:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:59,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:00,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:00,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495307428] [2023-11-06 23:03:00,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495307428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:00,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266937140] [2023-11-06 23:03:00,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:03:00,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:00,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:00,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:00,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:03:00,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:03:00,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:00,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 23:03:00,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:00,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:01,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266937140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:01,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:01,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2023-11-06 23:03:01,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762631239] [2023-11-06 23:03:01,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:01,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 23:03:01,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:01,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 23:03:01,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2023-11-06 23:03:02,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 223 [2023-11-06 23:03:02,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 283 flow. Second operand has 31 states, 31 states have (on average 113.54838709677419) internal successors, (3520), 31 states have internal predecessors, (3520), 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 23:03:02,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:02,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 223 [2023-11-06 23:03:02,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:03:03,549 INFO L124 PetriNetUnfolderBase]: 255/668 cut-off events. [2023-11-06 23:03:03,550 INFO L125 PetriNetUnfolderBase]: For 1337/1343 co-relation queries the response was YES. [2023-11-06 23:03:03,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2254 conditions, 668 events. 255/668 cut-off events. For 1337/1343 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2411 event pairs, 23 based on Foata normal form. 22/688 useless extension candidates. Maximal degree in co-relation 1184. Up to 118 conditions per place. [2023-11-06 23:03:03,561 INFO L140 encePairwiseOnDemand]: 216/223 looper letters, 0 selfloop transitions, 0 changer transitions 98/98 dead transitions. [2023-11-06 23:03:03,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 98 transitions, 742 flow [2023-11-06 23:03:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:03:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 23:03:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1401 transitions. [2023-11-06 23:03:03,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523542600896861 [2023-11-06 23:03:03,581 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1401 transitions. [2023-11-06 23:03:03,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1401 transitions. [2023-11-06 23:03:03,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:03:03,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1401 transitions. [2023-11-06 23:03:03,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 116.75) internal successors, (1401), 12 states have internal predecessors, (1401), 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 23:03:03,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 223.0) internal successors, (2899), 13 states have internal predecessors, (2899), 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 23:03:03,601 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 223.0) internal successors, (2899), 13 states have internal predecessors, (2899), 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 23:03:03,601 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 283 flow. Second operand 12 states and 1401 transitions. [2023-11-06 23:03:03,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 98 transitions, 742 flow [2023-11-06 23:03:03,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 98 transitions, 700 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-06 23:03:03,616 INFO L231 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2023-11-06 23:03:03,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2023-11-06 23:03:03,617 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2023-11-06 23:03:03,618 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2023-11-06 23:03:03,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 113.54838709677419) internal successors, (3520), 31 states have internal predecessors, (3520), 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 23:03:03,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-06 23:03:03,623 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-06 23:03:03,624 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-06 23:03:03,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:03,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:03:03,841 INFO L445 BasicCegarLoop]: Path program histogram: [8, 1, 1] [2023-11-06 23:03:03,845 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-06 23:03:03,845 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 23:03:03,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 11:03:03 BasicIcfg [2023-11-06 23:03:03,851 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 23:03:03,853 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 23:03:03,853 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 23:03:03,853 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 23:03:03,854 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:42" (3/4) ... [2023-11-06 23:03:03,856 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 23:03:03,864 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-06 23:03:03,864 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-06 23:03:03,874 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-11-06 23:03:03,875 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-06 23:03:03,875 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-06 23:03:03,876 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 23:03:03,946 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 23:03:03,947 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.yaml [2023-11-06 23:03:03,947 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 23:03:03,948 INFO L158 Benchmark]: Toolchain (without parser) took 23266.20ms. Allocated memory was 123.7MB in the beginning and 283.1MB in the end (delta: 159.4MB). Free memory was 75.9MB in the beginning and 184.3MB in the end (delta: -108.4MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. [2023-11-06 23:03:03,948 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 123.7MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 23:03:03,948 INFO L158 Benchmark]: CACSL2BoogieTranslator took 735.10ms. Allocated memory is still 123.7MB. Free memory was 75.6MB in the beginning and 90.9MB in the end (delta: -15.3MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. [2023-11-06 23:03:03,949 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.44ms. Allocated memory is still 123.7MB. Free memory was 90.4MB in the beginning and 88.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 23:03:03,949 INFO L158 Benchmark]: Boogie Preprocessor took 36.98ms. Allocated memory is still 123.7MB. Free memory was 88.3MB in the beginning and 86.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 23:03:03,950 INFO L158 Benchmark]: RCFGBuilder took 671.36ms. Allocated memory is still 123.7MB. Free memory was 86.7MB in the beginning and 69.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-06 23:03:03,950 INFO L158 Benchmark]: TraceAbstraction took 21663.13ms. Allocated memory was 123.7MB in the beginning and 283.1MB in the end (delta: 159.4MB). Free memory was 69.4MB in the beginning and 187.1MB in the end (delta: -117.7MB). Peak memory consumption was 41.7MB. Max. memory is 16.1GB. [2023-11-06 23:03:03,951 INFO L158 Benchmark]: Witness Printer took 94.30ms. Allocated memory is still 283.1MB. Free memory was 187.1MB in the beginning and 184.3MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 23:03:03,953 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 123.7MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 735.10ms. Allocated memory is still 123.7MB. Free memory was 75.6MB in the beginning and 90.9MB in the end (delta: -15.3MB). Peak memory consumption was 31.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.44ms. Allocated memory is still 123.7MB. Free memory was 90.4MB in the beginning and 88.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.98ms. Allocated memory is still 123.7MB. Free memory was 88.3MB in the beginning and 86.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 671.36ms. Allocated memory is still 123.7MB. Free memory was 86.7MB in the beginning and 69.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 21663.13ms. Allocated memory was 123.7MB in the beginning and 283.1MB in the end (delta: 159.4MB). Free memory was 69.4MB in the beginning and 187.1MB in the end (delta: -117.7MB). Peak memory consumption was 41.7MB. Max. memory is 16.1GB. * Witness Printer took 94.30ms. Allocated memory is still 283.1MB. Free memory was 187.1MB in the beginning and 184.3MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.7s, 116 PlacesBefore, 32 PlacesAfterwards, 117 TransitionsBefore, 30 TransitionsAfterwards, 1922 CoEnabledTransitionPairs, 7 FixpointIterations, 52 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 92 TotalNumberOfCompositions, 4363 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2197, independent: 2026, independent conditional: 0, independent unconditional: 2026, dependent: 171, dependent conditional: 0, dependent unconditional: 171, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1032, independent: 1002, independent conditional: 0, independent unconditional: 1002, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2197, independent: 1024, independent conditional: 0, independent unconditional: 1024, dependent: 141, dependent conditional: 0, dependent unconditional: 141, unknown: 1032, unknown conditional: 0, unknown unconditional: 1032] , Statistics on independence cache: Total cache size (in pairs): 119, Positive cache size: 106, Positive conditional cache size: 0, Positive unconditional cache size: 106, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 919]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 167 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 21.5s, OverallIterations: 10, TraceHistogramMax: 4, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 680 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 572 mSDsluCounter, 108 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 62 mSDsCounter, 66 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2989 IncrementalHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 66 mSolverCounterUnsat, 46 mSDtfsCounter, 2989 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 513 GetRequests, 435 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=469occurred in iteration=6, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 643 NumberOfCodeBlocks, 617 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 795 ConstructedInterpolants, 0 QuantifiedInterpolants, 3303 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1781 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 532/826 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-06 23:03:03,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e561549-a802-4819-9369-993d3184a1ad/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE