./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-11.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_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/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_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/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_509e8852-8e2b-4f8d-ad3a-1c93370040ea/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 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:01:53,108 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:01:53,199 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:01:53,206 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:01:53,206 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:01:53,233 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:01:53,234 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:01:53,235 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:01:53,236 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:01:53,236 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:01:53,237 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:01:53,238 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:01:53,239 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:01:53,239 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:01:53,240 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:01:53,241 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:01:53,241 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:01:53,242 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:01:53,243 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:01:53,243 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:01:53,244 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:01:53,245 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:01:53,245 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:01:53,246 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:01:53,246 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:01:53,247 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:01:53,247 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:01:53,248 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:01:53,248 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:53,249 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:01:53,250 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:01:53,250 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:01:53,250 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:01:53,251 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:01:53,251 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:01:53,251 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:01:53,252 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:01:53,252 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:01:53,252 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:01:53,253 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_509e8852-8e2b-4f8d-ad3a-1c93370040ea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 [2023-11-06 23:01:53,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:01:53,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:01:53,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:01:53,530 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:01:53,531 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:01:53,532 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread/fib_unsafe-11.i [2023-11-06 23:01:56,592 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:01:56,882 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:01:56,886 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/sv-benchmarks/c/pthread/fib_unsafe-11.i [2023-11-06 23:01:56,908 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/data/503e0371b/dc66322f3cee4b97a40cf1f43940d30b/FLAG4ccc30bd4 [2023-11-06 23:01:56,928 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/data/503e0371b/dc66322f3cee4b97a40cf1f43940d30b [2023-11-06 23:01:56,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:01:56,938 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:01:56,941 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:01:56,942 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:01:56,947 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:01:56,948 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:56" (1/1) ... [2023-11-06 23:01:56,949 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea29561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:56, skipping insertion in model container [2023-11-06 23:01:56,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:56" (1/1) ... [2023-11-06 23:01:57,015 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:01:57,473 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_509e8852-8e2b-4f8d-ad3a-1c93370040ea/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2023-11-06 23:01:57,497 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:01:57,508 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:01:57,542 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_509e8852-8e2b-4f8d-ad3a-1c93370040ea/sv-benchmarks/c/pthread/fib_unsafe-11.i[30243,30256] [2023-11-06 23:01:57,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:01:57,584 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:01:57,585 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:01:57,593 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:01:57,593 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57 WrapperNode [2023-11-06 23:01:57,594 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:01:57,595 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:01:57,595 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:01:57,595 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:01:57,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57" (1/1) ... [2023-11-06 23:01:57,618 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57" (1/1) ... [2023-11-06 23:01:57,648 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-11-06 23:01:57,649 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:01:57,650 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:01:57,650 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:01:57,650 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:01:57,662 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57" (1/1) ... [2023-11-06 23:01:57,662 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57" (1/1) ... [2023-11-06 23:01:57,671 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57" (1/1) ... [2023-11-06 23:01:57,671 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57" (1/1) ... [2023-11-06 23:01:57,679 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57" (1/1) ... [2023-11-06 23:01:57,682 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57" (1/1) ... [2023-11-06 23:01:57,684 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57" (1/1) ... [2023-11-06 23:01:57,695 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57" (1/1) ... [2023-11-06 23:01:57,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:01:57,700 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:01:57,700 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:01:57,701 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:01:57,702 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57" (1/1) ... [2023-11-06 23:01:57,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:57,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:57,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:01:57,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:01:57,766 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-06 23:01:57,766 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-06 23:01:57,767 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-06 23:01:57,767 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-06 23:01:57,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:01:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:01:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:01:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:01:57,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:01:57,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:01:57,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:01:57,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:01:57,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:01:57,771 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:01:57,911 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:01:57,913 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:01:58,152 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:01:58,162 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:01:58,163 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:01:58,165 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:58 BoogieIcfgContainer [2023-11-06 23:01:58,166 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:01:58,169 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:01:58,169 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:01:58,175 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:01:58,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:01:56" (1/3) ... [2023-11-06 23:01:58,176 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40717f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:58, skipping insertion in model container [2023-11-06 23:01:58,176 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:57" (2/3) ... [2023-11-06 23:01:58,178 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40717f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:58, skipping insertion in model container [2023-11-06 23:01:58,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:58" (3/3) ... [2023-11-06 23:01:58,180 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2023-11-06 23:01:58,199 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:01:58,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:01:58,213 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:01:58,213 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:01:58,316 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 23:01:58,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 97 transitions, 202 flow [2023-11-06 23:01:58,441 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-06 23:01:58,441 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:01:58,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 95 events. 7/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-11-06 23:01:58,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 97 transitions, 202 flow [2023-11-06 23:01:58,456 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 95 transitions, 196 flow [2023-11-06 23:01:58,471 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:01:58,482 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 95 transitions, 196 flow [2023-11-06 23:01:58,484 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 95 transitions, 196 flow [2023-11-06 23:01:58,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 95 transitions, 196 flow [2023-11-06 23:01:58,514 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-06 23:01:58,514 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:01:58,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 95 events. 7/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-11-06 23:01:58,519 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2023-11-06 23:02:02,355 INFO L134 LiptonReduction]: Checked pairs total: 1542 [2023-11-06 23:02:02,356 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-11-06 23:02:02,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:02:02,387 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;@2a1e9621, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:02:02,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 23:02:02,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:02:02,392 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2023-11-06 23:02:02,392 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:02:02,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:02,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:02:02,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:02,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1878456515, now seen corresponding path program 1 times [2023-11-06 23:02:02,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:02,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187487874] [2023-11-06 23:02:02,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:02,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:02,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:02,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187487874] [2023-11-06 23:02:02,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187487874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:02,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:02,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:02,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567039035] [2023-11-06 23:02:02,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:02,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:02,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:02,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:02,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:02,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 192 [2023-11-06 23:02:02,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:02,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:02,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 192 [2023-11-06 23:02:02,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:02,944 INFO L124 PetriNetUnfolderBase]: 97/149 cut-off events. [2023-11-06 23:02:02,945 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:02:02,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 331 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2023-11-06 23:02:02,948 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2023-11-06 23:02:02,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2023-11-06 23:02:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:02,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:02:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-11-06 23:02:02,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878472222222222 [2023-11-06 23:02:02,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-11-06 23:02:02,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-11-06 23:02:02,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:02,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-11-06 23:02:02,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:02,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:02,982 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:02,984 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 281 transitions. [2023-11-06 23:02:02,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2023-11-06 23:02:02,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:02:02,989 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2023-11-06 23:02:02,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-11-06 23:02:02,995 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2023-11-06 23:02:02,995 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2023-11-06 23:02:02,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:02,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:02,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:02,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:02:02,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:02,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1897390208, now seen corresponding path program 1 times [2023-11-06 23:02:02,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:02,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15682564] [2023-11-06 23:02:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:02,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:03,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15682564] [2023-11-06 23:02:03,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15682564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068075433] [2023-11-06 23:02:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:03,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:03,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:03,137 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:03,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:02:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:03,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:02:03,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:03,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:03,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068075433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:03,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:03,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 23:02:03,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773318357] [2023-11-06 23:02:03,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:03,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:02:03,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:03,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:02:03,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:02:03,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-06 23:02:03,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 86.71428571428571) internal successors, (607), 7 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:03,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:03,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-06 23:02:03,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:03,497 INFO L124 PetriNetUnfolderBase]: 133/203 cut-off events. [2023-11-06 23:02:03,501 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:02:03,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 448 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2023-11-06 23:02:03,507 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-11-06 23:02:03,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2023-11-06 23:02:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:02:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:02:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 554 transitions. [2023-11-06 23:02:03,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809027777777778 [2023-11-06 23:02:03,521 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 554 transitions. [2023-11-06 23:02:03,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 554 transitions. [2023-11-06 23:02:03,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:03,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 554 transitions. [2023-11-06 23:02:03,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.33333333333333) internal successors, (554), 6 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:03,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:03,538 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 192.0) internal successors, (1344), 7 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:03,538 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 554 transitions. [2023-11-06 23:02:03,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2023-11-06 23:02:03,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:03,541 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2023-11-06 23:02:03,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-11-06 23:02:03,542 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2023-11-06 23:02:03,542 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2023-11-06 23:02:03,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.71428571428571) internal successors, (607), 7 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:03,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:03,544 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:03,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:03,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:03,751 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:03,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:03,752 INFO L85 PathProgramCache]: Analyzing trace with hash -912867331, now seen corresponding path program 2 times [2023-11-06 23:02:03,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:03,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487681566] [2023-11-06 23:02:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:03,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:04,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:04,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487681566] [2023-11-06 23:02:04,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487681566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:04,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883164004] [2023-11-06 23:02:04,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:02:04,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:04,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:04,012 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:04,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:02:04,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:02:04,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:04,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:02:04,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:04,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:04,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883164004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:04,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:04,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 23:02:04,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929857556] [2023-11-06 23:02:04,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:04,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:02:04,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:04,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:02:04,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:02:04,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-06 23:02:04,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 86.38461538461539) internal successors, (1123), 13 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:04,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:04,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-06 23:02:04,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:04,514 INFO L124 PetriNetUnfolderBase]: 241/365 cut-off events. [2023-11-06 23:02:04,514 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-06 23:02:04,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 847 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2023-11-06 23:02:04,525 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2023-11-06 23:02:04,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2023-11-06 23:02:04,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:02:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 23:02:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1109 transitions. [2023-11-06 23:02:04,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813368055555556 [2023-11-06 23:02:04,532 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1109 transitions. [2023-11-06 23:02:04,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1109 transitions. [2023-11-06 23:02:04,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:04,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1109 transitions. [2023-11-06 23:02:04,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 92.41666666666667) internal successors, (1109), 12 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:04,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 192.0) internal successors, (2496), 13 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:04,548 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 192.0) internal successors, (2496), 13 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:04,549 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1109 transitions. [2023-11-06 23:02:04,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2023-11-06 23:02:04,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 23:02:04,559 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2023-11-06 23:02:04,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2023-11-06 23:02:04,561 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2023-11-06 23:02:04,562 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2023-11-06 23:02:04,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 86.38461538461539) internal successors, (1123), 13 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:04,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:04,564 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:04,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:04,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:04,770 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:04,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash 32956701, now seen corresponding path program 3 times [2023-11-06 23:02:04,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:04,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231119736] [2023-11-06 23:02:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:04,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:05,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:05,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231119736] [2023-11-06 23:02:05,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231119736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:05,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763046592] [2023-11-06 23:02:05,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:02:05,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:05,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:05,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:05,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:02:05,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 23:02:05,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:05,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:02:05,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:05,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:05,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763046592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:05,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:05,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-06 23:02:05,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215202700] [2023-11-06 23:02:05,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:05,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:02:05,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:05,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:02:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:02:05,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-06 23:02:05,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 25 states, 25 states have (on average 86.2) internal successors, (2155), 25 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:05,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:05,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-06 23:02:05,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:06,039 INFO L124 PetriNetUnfolderBase]: 457/689 cut-off events. [2023-11-06 23:02:06,039 INFO L125 PetriNetUnfolderBase]: For 4203/4203 co-relation queries the response was YES. [2023-11-06 23:02:06,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2140 conditions, 689 events. 457/689 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1645 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2118. Up to 190 conditions per place. [2023-11-06 23:02:06,048 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2023-11-06 23:02:06,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 167 transitions, 840 flow [2023-11-06 23:02:06,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:02:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 23:02:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2219 transitions. [2023-11-06 23:02:06,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4815538194444444 [2023-11-06 23:02:06,064 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2219 transitions. [2023-11-06 23:02:06,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2219 transitions. [2023-11-06 23:02:06,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:06,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2219 transitions. [2023-11-06 23:02:06,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 92.45833333333333) internal successors, (2219), 24 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:06,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 192.0) internal successors, (4800), 25 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:06,085 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 192.0) internal successors, (4800), 25 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:06,085 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 24 states and 2219 transitions. [2023-11-06 23:02:06,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 167 transitions, 840 flow [2023-11-06 23:02:06,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 167 transitions, 768 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-06 23:02:06,098 INFO L231 Difference]: Finished difference. Result has 71 places, 35 transitions, 266 flow [2023-11-06 23:02:06,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=266, PETRI_PLACES=71, PETRI_TRANSITIONS=35} [2023-11-06 23:02:06,100 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2023-11-06 23:02:06,100 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 35 transitions, 266 flow [2023-11-06 23:02:06,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 86.2) internal successors, (2155), 25 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:06,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:06,103 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:06,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:06,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:06,309 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:06,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:06,309 INFO L85 PathProgramCache]: Analyzing trace with hash 425270109, now seen corresponding path program 4 times [2023-11-06 23:02:06,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:06,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055940638] [2023-11-06 23:02:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:06,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:06,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:06,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055940638] [2023-11-06 23:02:06,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055940638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:06,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108328167] [2023-11-06 23:02:06,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:02:06,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:06,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:06,959 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:06,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:02:07,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:02:07,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:07,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 23:02:07,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:07,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:07,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108328167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:07,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:07,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2023-11-06 23:02:07,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231231846] [2023-11-06 23:02:07,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:07,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 23:02:07,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:07,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 23:02:07,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-11-06 23:02:07,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-06 23:02:07,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 35 transitions, 266 flow. Second operand has 27 states, 27 states have (on average 86.22222222222223) internal successors, (2328), 27 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:07,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:07,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-06 23:02:07,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:08,011 INFO L124 PetriNetUnfolderBase]: 493/743 cut-off events. [2023-11-06 23:02:08,011 INFO L125 PetriNetUnfolderBase]: For 5553/5553 co-relation queries the response was YES. [2023-11-06 23:02:08,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2422 conditions, 743 events. 493/743 cut-off events. For 5553/5553 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1777 event pairs, 20 based on Foata normal form. 18/597 useless extension candidates. Maximal degree in co-relation 2388. Up to 166 conditions per place. [2023-11-06 23:02:08,021 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 156 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2023-11-06 23:02:08,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 181 transitions, 932 flow [2023-11-06 23:02:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 23:02:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 23:02:08,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2393 transitions. [2023-11-06 23:02:08,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47936698717948717 [2023-11-06 23:02:08,033 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2393 transitions. [2023-11-06 23:02:08,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2393 transitions. [2023-11-06 23:02:08,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:08,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2393 transitions. [2023-11-06 23:02:08,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 92.03846153846153) internal successors, (2393), 26 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:08,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 192.0) internal successors, (5184), 27 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:08,057 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 192.0) internal successors, (5184), 27 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:08,057 INFO L175 Difference]: Start difference. First operand has 71 places, 35 transitions, 266 flow. Second operand 26 states and 2393 transitions. [2023-11-06 23:02:08,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 181 transitions, 932 flow [2023-11-06 23:02:08,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 181 transitions, 832 flow, removed 39 selfloop flow, removed 11 redundant places. [2023-11-06 23:02:08,079 INFO L231 Difference]: Finished difference. Result has 87 places, 37 transitions, 242 flow [2023-11-06 23:02:08,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=242, PETRI_PLACES=87, PETRI_TRANSITIONS=37} [2023-11-06 23:02:08,080 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 69 predicate places. [2023-11-06 23:02:08,080 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 37 transitions, 242 flow [2023-11-06 23:02:08,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 86.22222222222223) internal successors, (2328), 27 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:08,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:08,082 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:08,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:08,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:08,288 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:02:08,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash 662682557, now seen corresponding path program 5 times [2023-11-06 23:02:08,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:08,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512069671] [2023-11-06 23:02:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:08,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:10,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:10,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512069671] [2023-11-06 23:02:10,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512069671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:10,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943567673] [2023-11-06 23:02:10,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:02:10,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:10,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:10,889 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:10,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:02:11,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-06 23:02:11,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:11,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-06 23:02:11,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:12,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:15,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943567673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:15,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:15,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2023-11-06 23:02:15,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888610248] [2023-11-06 23:02:15,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:15,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-06 23:02:15,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:15,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-06 23:02:15,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=4829, Unknown=0, NotChecked=0, Total=5852 [2023-11-06 23:02:17,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 192 [2023-11-06 23:02:17,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 37 transitions, 242 flow. Second operand has 77 states, 77 states have (on average 81.16883116883118) internal successors, (6250), 77 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:17,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:17,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 192 [2023-11-06 23:02:17,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:05:22,352 INFO L124 PetriNetUnfolderBase]: 106539/159828 cut-off events. [2023-11-06 23:05:22,352 INFO L125 PetriNetUnfolderBase]: For 890562/890562 co-relation queries the response was YES. [2023-11-06 23:05:22,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502304 conditions, 159828 events. 106539/159828 cut-off events. For 890562/890562 co-relation queries the response was YES. Maximal size of possible extension queue 2850. Compared 1207151 event pairs, 144 based on Foata normal form. 257/118315 useless extension candidates. Maximal degree in co-relation 502268. Up to 32642 conditions per place. [2023-11-06 23:05:24,015 INFO L140 encePairwiseOnDemand]: 187/192 looper letters, 2639 selfloop transitions, 8329 changer transitions 0/10968 dead transitions. [2023-11-06 23:05:24,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 10968 transitions, 96400 flow [2023-11-06 23:05:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 605 states. [2023-11-06 23:05:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2023-11-06 23:05:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 52863 transitions. [2023-11-06 23:05:24,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45508780991735537 [2023-11-06 23:05:24,121 INFO L72 ComplementDD]: Start complementDD. Operand 605 states and 52863 transitions. [2023-11-06 23:05:24,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 605 states and 52863 transitions. [2023-11-06 23:05:24,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:05:24,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 605 states and 52863 transitions. [2023-11-06 23:05:24,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 606 states, 605 states have (on average 87.37685950413223) internal successors, (52863), 605 states have internal predecessors, (52863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:24,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 606 states, 606 states have (on average 192.0) internal successors, (116352), 606 states have internal predecessors, (116352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:24,468 INFO L81 ComplementDD]: Finished complementDD. Result has 606 states, 606 states have (on average 192.0) internal successors, (116352), 606 states have internal predecessors, (116352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:24,469 INFO L175 Difference]: Start difference. First operand has 87 places, 37 transitions, 242 flow. Second operand 605 states and 52863 transitions. [2023-11-06 23:05:24,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 10968 transitions, 96400 flow [2023-11-06 23:05:47,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 10968 transitions, 78444 flow, removed 3195 selfloop flow, removed 23 redundant places. [2023-11-06 23:05:47,756 INFO L231 Difference]: Finished difference. Result has 708 places, 8367 transitions, 49709 flow [2023-11-06 23:05:47,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=605, PETRI_FLOW=49709, PETRI_PLACES=708, PETRI_TRANSITIONS=8367} [2023-11-06 23:05:47,760 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 690 predicate places. [2023-11-06 23:05:47,760 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 8367 transitions, 49709 flow [2023-11-06 23:05:47,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 81.16883116883118) internal successors, (6250), 77 states have internal predecessors, (6250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:05:47,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:05:47,762 INFO L208 CegarLoopForPetriNet]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:47,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:47,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_509e8852-8e2b-4f8d-ad3a-1c93370040ea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:47,966 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 23:05:47,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:47,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1160679701, now seen corresponding path program 1 times [2023-11-06 23:05:47,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:47,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500389527] [2023-11-06 23:05:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:47,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat