./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.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_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/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_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/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_b9c047a2-fb0d-4e6e-8262-1128a24348bd/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 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:05:37,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:05:37,982 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:05:37,994 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:05:37,995 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:05:38,035 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:05:38,036 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:05:38,037 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:05:38,038 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:05:38,043 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:05:38,044 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:05:38,044 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:05:38,045 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:05:38,046 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:05:38,047 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:05:38,047 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:05:38,048 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:05:38,048 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:05:38,048 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:05:38,049 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:05:38,049 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:05:38,050 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:05:38,050 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:05:38,050 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:05:38,051 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:05:38,052 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:05:38,052 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:05:38,053 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:05:38,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:05:38,053 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:05:38,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:05:38,055 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:05:38,055 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:05:38,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:05:38,056 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:05:38,056 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:05:38,056 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:05:38,056 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:05:38,057 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:05:38,057 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_b9c047a2-fb0d-4e6e-8262-1128a24348bd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81147b3e42a82bd92b2fd1c17836bc41bf8598e66ad2317620561a8ac507fa9a [2023-11-06 22:05:38,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:05:38,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:05:38,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:05:38,427 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:05:38,428 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:05:38,429 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-06 22:05:41,494 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:05:41,829 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:05:41,830 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-06 22:05:41,860 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/data/cd063108e/778e9d9d7c6447418bc79a4d039d5885/FLAG87056a494 [2023-11-06 22:05:41,875 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/data/cd063108e/778e9d9d7c6447418bc79a4d039d5885 [2023-11-06 22:05:41,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:05:41,880 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:05:41,881 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:05:41,881 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:05:41,887 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:05:41,888 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:05:41" (1/1) ... [2023-11-06 22:05:41,889 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f93b22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:41, skipping insertion in model container [2023-11-06 22:05:41,890 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:05:41" (1/1) ... [2023-11-06 22:05:41,970 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:05:42,171 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_b9c047a2-fb0d-4e6e-8262-1128a24348bd/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-06 22:05:42,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:05:42,614 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:05:42,628 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_b9c047a2-fb0d-4e6e-8262-1128a24348bd/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-06 22:05:42,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:05:42,779 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:05:42,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42 WrapperNode [2023-11-06 22:05:42,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:05:42,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:05:42,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:05:42,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:05:42,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42" (1/1) ... [2023-11-06 22:05:42,809 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42" (1/1) ... [2023-11-06 22:05:42,845 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-11-06 22:05:42,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:05:42,846 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:05:42,847 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:05:42,847 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:05:42,861 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42" (1/1) ... [2023-11-06 22:05:42,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42" (1/1) ... [2023-11-06 22:05:42,872 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42" (1/1) ... [2023-11-06 22:05:42,874 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42" (1/1) ... [2023-11-06 22:05:42,879 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42" (1/1) ... [2023-11-06 22:05:42,888 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42" (1/1) ... [2023-11-06 22:05:42,890 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42" (1/1) ... [2023-11-06 22:05:42,892 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42" (1/1) ... [2023-11-06 22:05:42,901 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:05:42,902 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:05:42,902 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:05:42,902 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:05:42,903 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42" (1/1) ... [2023-11-06 22:05:42,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:05:42,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:42,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:05:42,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:05:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:05:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:05:42,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:05:42,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:05:42,985 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:05:42,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:05:42,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-11-06 22:05:42,985 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-11-06 22:05:42,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:05:42,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:05:42,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:05:42,987 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:05:43,125 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:05:43,127 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:05:43,265 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:05:43,272 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:05:43,272 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:05:43,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:05:43 BoogieIcfgContainer [2023-11-06 22:05:43,275 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:05:43,277 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:05:43,277 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:05:43,281 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:05:43,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:05:41" (1/3) ... [2023-11-06 22:05:43,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209fe051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:05:43, skipping insertion in model container [2023-11-06 22:05:43,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:05:42" (2/3) ... [2023-11-06 22:05:43,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209fe051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:05:43, skipping insertion in model container [2023-11-06 22:05:43,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:05:43" (3/3) ... [2023-11-06 22:05:43,284 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-11-06 22:05:43,293 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:05:43,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:05:43,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:05:43,303 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:05:43,367 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:05:43,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 88 transitions, 183 flow [2023-11-06 22:05:43,490 INFO L124 PetriNetUnfolderBase]: 7/87 cut-off events. [2023-11-06 22:05:43,493 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:05:43,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 87 events. 7/87 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-11-06 22:05:43,500 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 88 transitions, 183 flow [2023-11-06 22:05:43,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 76 transitions, 158 flow [2023-11-06 22:05:43,513 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:05:43,535 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 76 transitions, 158 flow [2023-11-06 22:05:43,539 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 76 transitions, 158 flow [2023-11-06 22:05:43,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 76 transitions, 158 flow [2023-11-06 22:05:43,574 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2023-11-06 22:05:43,574 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:05:43,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 76 events. 6/76 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2023-11-06 22:05:43,578 INFO L119 LiptonReduction]: Number of co-enabled transitions 722 [2023-11-06 22:05:45,912 INFO L134 LiptonReduction]: Checked pairs total: 866 [2023-11-06 22:05:45,912 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-11-06 22:05:45,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:05:45,949 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;@54790a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:05:45,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-06 22:05:45,962 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:05:45,962 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-06 22:05:45,962 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:05:45,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:45,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:45,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:05:45,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:45,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1177362520, now seen corresponding path program 1 times [2023-11-06 22:05:45,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:45,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399238449] [2023-11-06 22:05:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:45,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:46,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:46,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399238449] [2023-11-06 22:05:46,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399238449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:46,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:46,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:05:46,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992069390] [2023-11-06 22:05:46,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:46,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:05:46,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:46,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:05:46,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:05:46,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 155 [2023-11-06 22:05:46,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:46,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:46,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 155 [2023-11-06 22:05:46,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:46,413 INFO L124 PetriNetUnfolderBase]: 41/86 cut-off events. [2023-11-06 22:05:46,413 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:05:46,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 86 events. 41/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 203 event pairs, 15 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 162. Up to 53 conditions per place. [2023-11-06 22:05:46,416 INFO L140 encePairwiseOnDemand]: 152/155 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-11-06 22:05:46,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 23 transitions, 96 flow [2023-11-06 22:05:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:05:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:05:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-11-06 22:05:46,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2023-11-06 22:05:46,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-11-06 22:05:46,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-11-06 22:05:46,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:46,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-11-06 22:05:46,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:46,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:46,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:46,460 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 36 flow. Second operand 3 states and 245 transitions. [2023-11-06 22:05:46,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 23 transitions, 96 flow [2023-11-06 22:05:46,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:05:46,465 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 44 flow [2023-11-06 22:05:46,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2023-11-06 22:05:46,470 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2023-11-06 22:05:46,471 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 44 flow [2023-11-06 22:05:46,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:46,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:46,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:46,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:05:46,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:05:46,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:46,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1533867538, now seen corresponding path program 1 times [2023-11-06 22:05:46,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:46,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016937574] [2023-11-06 22:05:46,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:46,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:46,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:46,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016937574] [2023-11-06 22:05:46,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016937574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:46,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:46,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:05:46,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039135337] [2023-11-06 22:05:46,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:46,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:05:46,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:05:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:05:46,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 155 [2023-11-06 22:05:46,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:46,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:46,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 155 [2023-11-06 22:05:46,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:46,721 INFO L124 PetriNetUnfolderBase]: 61/143 cut-off events. [2023-11-06 22:05:46,721 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-06 22:05:46,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 143 events. 61/143 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 481 event pairs, 27 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 92. Up to 85 conditions per place. [2023-11-06 22:05:46,725 INFO L140 encePairwiseOnDemand]: 152/155 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-11-06 22:05:46,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 120 flow [2023-11-06 22:05:46,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:05:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:05:46,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-11-06 22:05:46,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513978494623656 [2023-11-06 22:05:46,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-11-06 22:05:46,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-11-06 22:05:46,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:46,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-11-06 22:05:46,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:46,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:46,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:46,740 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 44 flow. Second operand 3 states and 239 transitions. [2023-11-06 22:05:46,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 120 flow [2023-11-06 22:05:46,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:05:46,746 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 54 flow [2023-11-06 22:05:46,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2023-11-06 22:05:46,748 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 3 predicate places. [2023-11-06 22:05:46,748 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 54 flow [2023-11-06 22:05:46,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:46,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:46,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:46,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:05:46,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:05:46,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:46,757 INFO L85 PathProgramCache]: Analyzing trace with hash -583994317, now seen corresponding path program 1 times [2023-11-06 22:05:46,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:46,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67152111] [2023-11-06 22:05:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:46,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:46,925 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 22:05:46,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:46,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67152111] [2023-11-06 22:05:46,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67152111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:46,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382428489] [2023-11-06 22:05:46,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:46,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:46,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:46,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:46,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:05:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:47,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:05:47,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:47,155 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 22:05:47,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:47,196 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 22:05:47,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382428489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:47,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:47,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 22:05:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845982727] [2023-11-06 22:05:47,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:47,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:05:47,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:05:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:05:47,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 155 [2023-11-06 22:05:47,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:47,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:47,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 155 [2023-11-06 22:05:47,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:47,403 INFO L124 PetriNetUnfolderBase]: 111/264 cut-off events. [2023-11-06 22:05:47,403 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-11-06 22:05:47,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 264 events. 111/264 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 935 event pairs, 18 based on Foata normal form. 30/294 useless extension candidates. Maximal degree in co-relation 198. Up to 55 conditions per place. [2023-11-06 22:05:47,407 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 44 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2023-11-06 22:05:47,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 51 transitions, 258 flow [2023-11-06 22:05:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:05:47,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:05:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 474 transitions. [2023-11-06 22:05:47,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096774193548387 [2023-11-06 22:05:47,411 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 474 transitions. [2023-11-06 22:05:47,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 474 transitions. [2023-11-06 22:05:47,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:47,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 474 transitions. [2023-11-06 22:05:47,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:47,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:47,417 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 155.0) internal successors, (1085), 7 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:47,417 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 54 flow. Second operand 6 states and 474 transitions. [2023-11-06 22:05:47,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 51 transitions, 258 flow [2023-11-06 22:05:47,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 51 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:05:47,420 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 92 flow [2023-11-06 22:05:47,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-11-06 22:05:47,421 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 11 predicate places. [2023-11-06 22:05:47,422 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 92 flow [2023-11-06 22:05:47,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:47,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:47,423 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:47,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:47,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:47,629 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:05:47,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:47,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1938670526, now seen corresponding path program 2 times [2023-11-06 22:05:47,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:47,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076503665] [2023-11-06 22:05:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:47,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-06 22:05:47,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:47,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076503665] [2023-11-06 22:05:47,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076503665] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:47,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514025240] [2023-11-06 22:05:47,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:05:47,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:47,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:47,788 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:47,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:05:47,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:05:47,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:47,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:05:47,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:05:47,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:05:48,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514025240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:48,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:48,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-06 22:05:48,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799086961] [2023-11-06 22:05:48,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:48,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:05:48,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:48,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:05:48,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:05:48,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 155 [2023-11-06 22:05:48,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 92 flow. Second operand has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:48,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:48,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 155 [2023-11-06 22:05:48,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:48,828 INFO L124 PetriNetUnfolderBase]: 323/744 cut-off events. [2023-11-06 22:05:48,828 INFO L125 PetriNetUnfolderBase]: For 1524/1524 co-relation queries the response was YES. [2023-11-06 22:05:48,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 744 events. 323/744 cut-off events. For 1524/1524 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3089 event pairs, 10 based on Foata normal form. 107/851 useless extension candidates. Maximal degree in co-relation 584. Up to 168 conditions per place. [2023-11-06 22:05:48,837 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 158 selfloop transitions, 69 changer transitions 0/228 dead transitions. [2023-11-06 22:05:48,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 228 transitions, 1346 flow [2023-11-06 22:05:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:05:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 22:05:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2534 transitions. [2023-11-06 22:05:48,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808349146110057 [2023-11-06 22:05:48,848 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2534 transitions. [2023-11-06 22:05:48,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2534 transitions. [2023-11-06 22:05:48,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:48,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2534 transitions. [2023-11-06 22:05:48,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 74.52941176470588) internal successors, (2534), 34 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:48,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 155.0) internal successors, (5425), 35 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:48,874 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 155.0) internal successors, (5425), 35 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:48,874 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 92 flow. Second operand 34 states and 2534 transitions. [2023-11-06 22:05:48,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 228 transitions, 1346 flow [2023-11-06 22:05:48,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 228 transitions, 1286 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-11-06 22:05:48,886 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 724 flow [2023-11-06 22:05:48,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2023-11-06 22:05:48,887 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 68 predicate places. [2023-11-06 22:05:48,887 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 724 flow [2023-11-06 22:05:48,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:48,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:48,889 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:48,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:49,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:49,096 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:05:49,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1848940042, now seen corresponding path program 3 times [2023-11-06 22:05:49,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:49,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400567372] [2023-11-06 22:05:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:49,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:05:49,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:49,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400567372] [2023-11-06 22:05:49,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400567372] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:49,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605534533] [2023-11-06 22:05:49,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:05:49,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:49,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:49,458 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:49,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:05:49,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:05:49,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:49,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:05:49,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-06 22:05:49,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-06 22:05:49,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605534533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:49,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:49,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-06 22:05:49,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029827335] [2023-11-06 22:05:49,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:49,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:05:49,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:49,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:05:49,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:05:49,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 155 [2023-11-06 22:05:49,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 724 flow. Second operand has 19 states, 19 states have (on average 69.94736842105263) internal successors, (1329), 19 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:49,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:49,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 155 [2023-11-06 22:05:49,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:51,973 INFO L124 PetriNetUnfolderBase]: 703/1500 cut-off events. [2023-11-06 22:05:51,973 INFO L125 PetriNetUnfolderBase]: For 27827/27827 co-relation queries the response was YES. [2023-11-06 22:05:51,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7760 conditions, 1500 events. 703/1500 cut-off events. For 27827/27827 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7285 event pairs, 14 based on Foata normal form. 131/1631 useless extension candidates. Maximal degree in co-relation 5829. Up to 351 conditions per place. [2023-11-06 22:05:51,999 INFO L140 encePairwiseOnDemand]: 148/155 looper letters, 330 selfloop transitions, 186 changer transitions 0/517 dead transitions. [2023-11-06 22:05:52,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 517 transitions, 5320 flow [2023-11-06 22:05:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-06 22:05:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-11-06 22:05:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6260 transitions. [2023-11-06 22:05:52,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47514231499051235 [2023-11-06 22:05:52,026 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6260 transitions. [2023-11-06 22:05:52,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6260 transitions. [2023-11-06 22:05:52,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:52,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6260 transitions. [2023-11-06 22:05:52,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 73.6470588235294) internal successors, (6260), 85 states have internal predecessors, (6260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:52,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 155.0) internal successors, (13330), 86 states have internal predecessors, (13330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:52,127 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 155.0) internal successors, (13330), 86 states have internal predecessors, (13330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:52,128 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 724 flow. Second operand 85 states and 6260 transitions. [2023-11-06 22:05:52,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 517 transitions, 5320 flow [2023-11-06 22:05:52,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 517 transitions, 5222 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-06 22:05:52,192 INFO L231 Difference]: Finished difference. Result has 227 places, 208 transitions, 3292 flow [2023-11-06 22:05:52,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=3292, PETRI_PLACES=227, PETRI_TRANSITIONS=208} [2023-11-06 22:05:52,193 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 210 predicate places. [2023-11-06 22:05:52,193 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 208 transitions, 3292 flow [2023-11-06 22:05:52,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 69.94736842105263) internal successors, (1329), 19 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:52,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:52,194 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:52,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:52,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:52,401 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:05:52,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:52,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1467666847, now seen corresponding path program 4 times [2023-11-06 22:05:52,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:52,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539647290] [2023-11-06 22:05:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:52,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 11 proven. 66 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-06 22:05:52,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:52,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539647290] [2023-11-06 22:05:52,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539647290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:52,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094852203] [2023-11-06 22:05:52,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:05:52,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:52,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:52,801 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:52,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:05:53,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:05:53,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:53,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:05:53,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 11 proven. 66 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-06 22:05:53,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 11 proven. 66 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-11-06 22:05:53,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094852203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:53,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:53,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-06 22:05:53,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934338646] [2023-11-06 22:05:53,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:53,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:05:53,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:05:53,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:05:53,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 155 [2023-11-06 22:05:53,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 208 transitions, 3292 flow. Second operand has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:53,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:53,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 155 [2023-11-06 22:05:53,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:55,203 INFO L124 PetriNetUnfolderBase]: 1535/3145 cut-off events. [2023-11-06 22:05:55,204 INFO L125 PetriNetUnfolderBase]: For 349906/349908 co-relation queries the response was YES. [2023-11-06 22:05:55,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23102 conditions, 3145 events. 1535/3145 cut-off events. For 349906/349908 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 16922 event pairs, 96 based on Foata normal form. 210/3355 useless extension candidates. Maximal degree in co-relation 20262. Up to 767 conditions per place. [2023-11-06 22:05:55,286 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 494 selfloop transitions, 198 changer transitions 0/693 dead transitions. [2023-11-06 22:05:55,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 693 transitions, 12154 flow [2023-11-06 22:05:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:05:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:05:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1299 transitions. [2023-11-06 22:05:55,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5237903225806452 [2023-11-06 22:05:55,291 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1299 transitions. [2023-11-06 22:05:55,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1299 transitions. [2023-11-06 22:05:55,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:55,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1299 transitions. [2023-11-06 22:05:55,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 81.1875) internal successors, (1299), 16 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:55,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 155.0) internal successors, (2635), 17 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:55,301 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 155.0) internal successors, (2635), 17 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:55,301 INFO L175 Difference]: Start difference. First operand has 227 places, 208 transitions, 3292 flow. Second operand 16 states and 1299 transitions. [2023-11-06 22:05:55,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 693 transitions, 12154 flow [2023-11-06 22:05:56,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 693 transitions, 8518 flow, removed 1584 selfloop flow, removed 27 redundant places. [2023-11-06 22:05:56,300 INFO L231 Difference]: Finished difference. Result has 224 places, 316 transitions, 3574 flow [2023-11-06 22:05:56,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3574, PETRI_PLACES=224, PETRI_TRANSITIONS=316} [2023-11-06 22:05:56,302 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 207 predicate places. [2023-11-06 22:05:56,302 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 316 transitions, 3574 flow [2023-11-06 22:05:56,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 77.0) internal successors, (1309), 17 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:56,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:56,304 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:05:56,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:05:56,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:56,510 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:05:56,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:56,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1604000257, now seen corresponding path program 5 times [2023-11-06 22:05:56,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:56,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109662825] [2023-11-06 22:05:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:56,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 14 proven. 176 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-06 22:05:57,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:57,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109662825] [2023-11-06 22:05:57,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109662825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:05:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946042927] [2023-11-06 22:05:57,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:05:57,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:05:57,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:05:57,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:05:57,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:05:57,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-06 22:05:57,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:05:57,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:05:57,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:05:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 14 proven. 176 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-06 22:05:57,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:05:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 14 proven. 176 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2023-11-06 22:05:57,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946042927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:05:57,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:05:57,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-11-06 22:05:57,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146034449] [2023-11-06 22:05:57,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:05:57,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:05:57,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:05:57,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:05:58,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 155 [2023-11-06 22:05:58,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 316 transitions, 3574 flow. Second operand has 23 states, 23 states have (on average 73.6086956521739) internal successors, (1693), 23 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:58,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:58,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 155 [2023-11-06 22:05:58,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:06:00,746 INFO L124 PetriNetUnfolderBase]: 2538/5992 cut-off events. [2023-11-06 22:06:00,746 INFO L125 PetriNetUnfolderBase]: For 365593/365593 co-relation queries the response was YES. [2023-11-06 22:06:00,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34726 conditions, 5992 events. 2538/5992 cut-off events. For 365593/365593 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 36305 event pairs, 324 based on Foata normal form. 531/6523 useless extension candidates. Maximal degree in co-relation 31240. Up to 1298 conditions per place. [2023-11-06 22:06:00,866 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 516 selfloop transitions, 150 changer transitions 0/667 dead transitions. [2023-11-06 22:06:00,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 667 transitions, 12380 flow [2023-11-06 22:06:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:06:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:06:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1744 transitions. [2023-11-06 22:06:00,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114369501466276 [2023-11-06 22:06:00,872 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1744 transitions. [2023-11-06 22:06:00,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1744 transitions. [2023-11-06 22:06:00,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:06:00,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1744 transitions. [2023-11-06 22:06:00,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 79.27272727272727) internal successors, (1744), 22 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:00,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 155.0) internal successors, (3565), 23 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:00,885 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 155.0) internal successors, (3565), 23 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:00,885 INFO L175 Difference]: Start difference. First operand has 224 places, 316 transitions, 3574 flow. Second operand 22 states and 1744 transitions. [2023-11-06 22:06:00,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 667 transitions, 12380 flow [2023-11-06 22:06:01,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 667 transitions, 12120 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-06 22:06:01,910 INFO L231 Difference]: Finished difference. Result has 250 places, 375 transitions, 4616 flow [2023-11-06 22:06:01,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4616, PETRI_PLACES=250, PETRI_TRANSITIONS=375} [2023-11-06 22:06:01,911 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 233 predicate places. [2023-11-06 22:06:01,912 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 375 transitions, 4616 flow [2023-11-06 22:06:01,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 73.6086956521739) internal successors, (1693), 23 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:01,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:06:01,913 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:01,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:02,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:02,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:06:02,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:02,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1724777588, now seen corresponding path program 6 times [2023-11-06 22:06:02,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:02,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699977174] [2023-11-06 22:06:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:02,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-11-06 22:06:02,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:02,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699977174] [2023-11-06 22:06:02,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699977174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:02,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339107785] [2023-11-06 22:06:02,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:06:02,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:02,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:02,841 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:02,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:06:03,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2023-11-06 22:06:03,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:06:03,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:06:03,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-11-06 22:06:03,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 20 proven. 378 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-11-06 22:06:04,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339107785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:04,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:04,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-11-06 22:06:04,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831006531] [2023-11-06 22:06:04,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:04,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:06:04,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:04,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:06:04,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:06:04,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 155 [2023-11-06 22:06:04,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 375 transitions, 4616 flow. Second operand has 23 states, 23 states have (on average 77.17391304347827) internal successors, (1775), 23 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:04,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:06:04,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 155 [2023-11-06 22:06:04,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:06:07,811 INFO L124 PetriNetUnfolderBase]: 3570/7327 cut-off events. [2023-11-06 22:06:07,811 INFO L125 PetriNetUnfolderBase]: For 751132/751134 co-relation queries the response was YES. [2023-11-06 22:06:07,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50120 conditions, 7327 events. 3570/7327 cut-off events. For 751132/751134 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 45330 event pairs, 194 based on Foata normal form. 260/7587 useless extension candidates. Maximal degree in co-relation 45514. Up to 1826 conditions per place. [2023-11-06 22:06:07,975 INFO L140 encePairwiseOnDemand]: 151/155 looper letters, 1059 selfloop transitions, 270 changer transitions 0/1330 dead transitions. [2023-11-06 22:06:07,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 1330 transitions, 20652 flow [2023-11-06 22:06:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:06:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 22:06:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1783 transitions. [2023-11-06 22:06:07,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228739002932551 [2023-11-06 22:06:07,980 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1783 transitions. [2023-11-06 22:06:07,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1783 transitions. [2023-11-06 22:06:07,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:06:07,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1783 transitions. [2023-11-06 22:06:07,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 81.04545454545455) internal successors, (1783), 22 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:07,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 155.0) internal successors, (3565), 23 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:07,994 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 155.0) internal successors, (3565), 23 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:07,994 INFO L175 Difference]: Start difference. First operand has 250 places, 375 transitions, 4616 flow. Second operand 22 states and 1783 transitions. [2023-11-06 22:06:07,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 1330 transitions, 20652 flow [2023-11-06 22:06:09,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 1330 transitions, 19882 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-06 22:06:09,297 INFO L231 Difference]: Finished difference. Result has 267 places, 459 transitions, 6216 flow [2023-11-06 22:06:09,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=4462, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6216, PETRI_PLACES=267, PETRI_TRANSITIONS=459} [2023-11-06 22:06:09,298 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 250 predicate places. [2023-11-06 22:06:09,298 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 459 transitions, 6216 flow [2023-11-06 22:06:09,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 77.17391304347827) internal successors, (1775), 23 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:09,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:06:09,300 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:09,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:09,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:09,507 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:06:09,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:09,508 INFO L85 PathProgramCache]: Analyzing trace with hash 331553514, now seen corresponding path program 7 times [2023-11-06 22:06:09,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:09,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571953846] [2023-11-06 22:06:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:09,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:15,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:15,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571953846] [2023-11-06 22:06:15,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571953846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:15,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19527500] [2023-11-06 22:06:15,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:06:15,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:15,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:15,245 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:15,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9c047a2-fb0d-4e6e-8262-1128a24348bd/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:06:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:15,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 168 conjunts are in the unsatisfiable core [2023-11-06 22:06:15,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:15,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:06:16,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19527500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:16,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:06:16,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-11-06 22:06:16,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656413881] [2023-11-06 22:06:16,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:16,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-06 22:06:16,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:16,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-06 22:06:16,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-11-06 22:06:17,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 155 [2023-11-06 22:06:17,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 459 transitions, 6216 flow. Second operand has 63 states, 63 states have (on average 73.34920634920636) internal successors, (4621), 63 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:06:17,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:06:17,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 155 [2023-11-06 22:06:17,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand