./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/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_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/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_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/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 e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:52:13,396 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:52:13,536 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:52:13,541 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:52:13,541 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:52:13,590 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:52:13,592 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:52:13,593 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:52:13,595 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:52:13,600 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:52:13,602 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:52:13,603 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:52:13,603 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:52:13,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:52:13,606 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:52:13,606 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:52:13,607 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:52:13,607 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:52:13,608 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:52:13,608 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:52:13,608 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:52:13,609 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:52:13,609 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:52:13,610 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:52:13,610 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:52:13,611 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:52:13,612 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:52:13,612 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:52:13,613 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:52:13,614 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:52:13,615 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:52:13,615 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:52:13,616 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:52:13,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:52:13,616 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:52:13,616 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:52:13,617 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:52:13,617 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:52:13,617 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:52:13,617 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_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 [2023-11-06 22:52:13,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:52:13,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:52:13,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:52:13,958 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:52:13,959 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:52:13,960 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread/fib_safe-12.i [2023-11-06 22:52:17,262 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:52:17,566 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:52:17,568 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/sv-benchmarks/c/pthread/fib_safe-12.i [2023-11-06 22:52:17,583 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/data/8757df7c1/0c19ac83d41a449fb3814f85429bffea/FLAG075fc76c5 [2023-11-06 22:52:17,597 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/data/8757df7c1/0c19ac83d41a449fb3814f85429bffea [2023-11-06 22:52:17,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:52:17,601 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:52:17,602 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:52:17,604 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:52:17,616 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:52:17,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:17" (1/1) ... [2023-11-06 22:52:17,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774cc3c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:17, skipping insertion in model container [2023-11-06 22:52:17,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:17" (1/1) ... [2023-11-06 22:52:17,673 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:52:18,024 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_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/sv-benchmarks/c/pthread/fib_safe-12.i[30241,30254] [2023-11-06 22:52:18,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:52:18,070 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:52:18,135 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_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/sv-benchmarks/c/pthread/fib_safe-12.i[30241,30254] [2023-11-06 22:52:18,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:52:18,196 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:52:18,197 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:52:18,205 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:52:18,206 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18 WrapperNode [2023-11-06 22:52:18,206 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:52:18,208 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:52:18,208 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:52:18,208 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:52:18,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18" (1/1) ... [2023-11-06 22:52:18,259 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18" (1/1) ... [2023-11-06 22:52:18,292 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-11-06 22:52:18,293 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:52:18,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:52:18,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:52:18,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:52:18,305 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18" (1/1) ... [2023-11-06 22:52:18,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18" (1/1) ... [2023-11-06 22:52:18,314 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18" (1/1) ... [2023-11-06 22:52:18,314 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18" (1/1) ... [2023-11-06 22:52:18,331 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18" (1/1) ... [2023-11-06 22:52:18,336 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18" (1/1) ... [2023-11-06 22:52:18,345 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18" (1/1) ... [2023-11-06 22:52:18,352 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18" (1/1) ... [2023-11-06 22:52:18,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:52:18,362 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:52:18,362 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:52:18,362 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:52:18,363 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18" (1/1) ... [2023-11-06 22:52:18,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:52:18,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:18,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:52:18,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:52:18,454 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-06 22:52:18,454 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-06 22:52:18,454 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-06 22:52:18,455 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-06 22:52:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:52:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:52:18,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:52:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:52:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:52:18,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:52:18,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:52:18,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:52:18,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:52:18,461 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 22:52:18,663 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:52:18,665 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:52:18,907 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:52:18,915 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:52:18,915 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:52:18,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:18 BoogieIcfgContainer [2023-11-06 22:52:18,918 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:52:18,920 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:52:18,921 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:52:18,923 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:52:18,924 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:52:17" (1/3) ... [2023-11-06 22:52:18,925 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b8e150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:18, skipping insertion in model container [2023-11-06 22:52:18,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:18" (2/3) ... [2023-11-06 22:52:18,925 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b8e150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:18, skipping insertion in model container [2023-11-06 22:52:18,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:18" (3/3) ... [2023-11-06 22:52:18,927 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-12.i [2023-11-06 22:52:18,934 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:52:18,943 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:52:18,943 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:52:18,944 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:52:19,006 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:52:19,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 97 transitions, 202 flow [2023-11-06 22:52:19,130 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-06 22:52:19,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:52:19,139 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 22:52:19,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 97 transitions, 202 flow [2023-11-06 22:52:19,152 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 95 transitions, 196 flow [2023-11-06 22:52:19,156 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:52:19,174 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 95 transitions, 196 flow [2023-11-06 22:52:19,177 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 95 transitions, 196 flow [2023-11-06 22:52:19,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 95 transitions, 196 flow [2023-11-06 22:52:19,209 INFO L124 PetriNetUnfolderBase]: 7/95 cut-off events. [2023-11-06 22:52:19,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:52:19,211 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 22:52:19,214 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2023-11-06 22:52:23,107 INFO L134 LiptonReduction]: Checked pairs total: 1542 [2023-11-06 22:52:23,110 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-11-06 22:52:23,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:52:23,155 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;@67b3c3d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:52:23,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:52:23,167 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:52:23,167 INFO L124 PetriNetUnfolderBase]: 3/12 cut-off events. [2023-11-06 22:52:23,168 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:52:23,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:23,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:52:23,170 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 22:52:23,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:23,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1878456515, now seen corresponding path program 1 times [2023-11-06 22:52:23,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:23,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680354728] [2023-11-06 22:52:23,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:23,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:23,541 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 22:52:23,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:23,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680354728] [2023-11-06 22:52:23,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680354728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:23,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:23,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:52:23,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530369916] [2023-11-06 22:52:23,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:23,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:52:23,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:52:23,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:23,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 192 [2023-11-06 22:52:23,609 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 22:52:23,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:23,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 192 [2023-11-06 22:52:23,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:23,722 INFO L124 PetriNetUnfolderBase]: 97/149 cut-off events. [2023-11-06 22:52:23,722 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:52:23,725 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 22:52:23,729 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2023-11-06 22:52:23,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2023-11-06 22:52:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:52:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:52:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-11-06 22:52:23,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878472222222222 [2023-11-06 22:52:23,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-11-06 22:52:23,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-11-06 22:52:23,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:23,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-11-06 22:52:23,777 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 22:52:23,783 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 22:52:23,784 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 22:52:23,786 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 281 transitions. [2023-11-06 22:52:23,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2023-11-06 22:52:23,790 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 22:52:23,792 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2023-11-06 22:52:23,795 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 22:52:23,800 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2023-11-06 22:52:23,800 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2023-11-06 22:52:23,801 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 22:52:23,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:23,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:23,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:52:23,802 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 22:52:23,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:23,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1897390208, now seen corresponding path program 1 times [2023-11-06 22:52:23,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:23,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737459139] [2023-11-06 22:52:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:23,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:23,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:23,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737459139] [2023-11-06 22:52:23,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737459139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:23,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727828802] [2023-11-06 22:52:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:23,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:23,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:23,978 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:23,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:52:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:24,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:52:24,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:24,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:24,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727828802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:24,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:24,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:52:24,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818269912] [2023-11-06 22:52:24,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:24,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:52:24,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:24,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:52:24,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:52:24,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-06 22:52:24,164 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 22:52:24,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:24,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-06 22:52:24,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:24,285 INFO L124 PetriNetUnfolderBase]: 133/203 cut-off events. [2023-11-06 22:52:24,287 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:52:24,295 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 22:52:24,298 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-11-06 22:52:24,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2023-11-06 22:52:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:52:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:52:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 554 transitions. [2023-11-06 22:52:24,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4809027777777778 [2023-11-06 22:52:24,308 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 554 transitions. [2023-11-06 22:52:24,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 554 transitions. [2023-11-06 22:52:24,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:24,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 554 transitions. [2023-11-06 22:52:24,314 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 22:52:24,322 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 22:52:24,323 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 22:52:24,324 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 554 transitions. [2023-11-06 22:52:24,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2023-11-06 22:52:24,342 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 22:52:24,343 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2023-11-06 22:52:24,344 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 22:52:24,345 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2023-11-06 22:52:24,346 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2023-11-06 22:52:24,346 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 22:52:24,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:24,347 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:24,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:24,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 22:52:24,554 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 22:52:24,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:24,555 INFO L85 PathProgramCache]: Analyzing trace with hash -912867331, now seen corresponding path program 2 times [2023-11-06 22:52:24,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:24,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864844067] [2023-11-06 22:52:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:24,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:24,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:24,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864844067] [2023-11-06 22:52:24,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864844067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:24,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678794245] [2023-11-06 22:52:24,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:24,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:24,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:24,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:24,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:52:24,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:24,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:24,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:52:24,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:24,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:25,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678794245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:25,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:25,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:52:25,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929605771] [2023-11-06 22:52:25,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:25,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:52:25,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:25,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:52:25,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:52:25,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-06 22:52:25,072 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 22:52:25,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:25,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-06 22:52:25,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:25,260 INFO L124 PetriNetUnfolderBase]: 241/365 cut-off events. [2023-11-06 22:52:25,261 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-06 22:52:25,263 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 22:52:25,267 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2023-11-06 22:52:25,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2023-11-06 22:52:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:52:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:52:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1109 transitions. [2023-11-06 22:52:25,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813368055555556 [2023-11-06 22:52:25,273 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1109 transitions. [2023-11-06 22:52:25,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1109 transitions. [2023-11-06 22:52:25,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:25,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1109 transitions. [2023-11-06 22:52:25,278 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 22:52:25,285 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 22:52:25,287 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 22:52:25,288 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1109 transitions. [2023-11-06 22:52:25,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2023-11-06 22:52:25,291 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 22:52:25,293 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2023-11-06 22:52:25,293 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 22:52:25,294 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2023-11-06 22:52:25,295 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2023-11-06 22:52:25,296 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 22:52:25,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:25,296 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:25,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:25,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:25,503 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 22:52:25,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:25,503 INFO L85 PathProgramCache]: Analyzing trace with hash 32956701, now seen corresponding path program 3 times [2023-11-06 22:52:25,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:25,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567065407] [2023-11-06 22:52:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:25,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:25,819 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 22:52:25,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:25,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567065407] [2023-11-06 22:52:25,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567065407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:25,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76192642] [2023-11-06 22:52:25,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:52:25,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:25,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:25,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:25,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:52:25,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:52:25,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:25,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:52:25,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:26,010 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 22:52:26,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:26,285 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 22:52:26,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76192642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:26,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:26,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-06 22:52:26,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516111613] [2023-11-06 22:52:26,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:26,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:52:26,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:26,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:52:26,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:52:26,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-06 22:52:26,361 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 22:52:26,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:26,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-06 22:52:26,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:26,797 INFO L124 PetriNetUnfolderBase]: 457/689 cut-off events. [2023-11-06 22:52:26,797 INFO L125 PetriNetUnfolderBase]: For 4203/4203 co-relation queries the response was YES. [2023-11-06 22:52:26,802 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 22:52:26,808 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2023-11-06 22:52:26,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 167 transitions, 840 flow [2023-11-06 22:52:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:52:26,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:52:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2219 transitions. [2023-11-06 22:52:26,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4815538194444444 [2023-11-06 22:52:26,824 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2219 transitions. [2023-11-06 22:52:26,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2219 transitions. [2023-11-06 22:52:26,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:26,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2219 transitions. [2023-11-06 22:52:26,833 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 22:52:26,844 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 22:52:26,847 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 22:52:26,847 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 24 states and 2219 transitions. [2023-11-06 22:52:26,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 167 transitions, 840 flow [2023-11-06 22:52:26,857 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 22:52:26,861 INFO L231 Difference]: Finished difference. Result has 71 places, 35 transitions, 266 flow [2023-11-06 22:52:26,861 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 22:52:26,863 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2023-11-06 22:52:26,864 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 35 transitions, 266 flow [2023-11-06 22:52:26,866 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 22:52:26,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:26,867 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:26,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:27,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:27,072 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 22:52:27,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:27,073 INFO L85 PathProgramCache]: Analyzing trace with hash 425270109, now seen corresponding path program 4 times [2023-11-06 22:52:27,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:27,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037760962] [2023-11-06 22:52:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:27,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:27,710 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 22:52:27,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:27,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037760962] [2023-11-06 22:52:27,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037760962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:27,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136167786] [2023-11-06 22:52:27,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:52:27,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:27,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:27,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:27,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:52:27,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:52:27,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:27,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:52:27,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:27,970 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 22:52:27,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:28,391 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 22:52:28,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136167786] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:28,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:28,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 28 [2023-11-06 22:52:28,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13399258] [2023-11-06 22:52:28,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:28,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:52:28,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:28,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:52:28,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:52:28,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 192 [2023-11-06 22:52:28,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 35 transitions, 266 flow. Second operand has 29 states, 29 states have (on average 86.20689655172414) internal successors, (2500), 29 states have internal predecessors, (2500), 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 22:52:28,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:28,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 192 [2023-11-06 22:52:28,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:28,907 INFO L124 PetriNetUnfolderBase]: 529/797 cut-off events. [2023-11-06 22:52:28,908 INFO L125 PetriNetUnfolderBase]: For 9333/9333 co-relation queries the response was YES. [2023-11-06 22:52:28,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2584 conditions, 797 events. 529/797 cut-off events. For 9333/9333 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1910 event pairs, 20 based on Foata normal form. 36/657 useless extension candidates. Maximal degree in co-relation 2550. Up to 178 conditions per place. [2023-11-06 22:52:28,920 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 168 selfloop transitions, 27 changer transitions 0/195 dead transitions. [2023-11-06 22:52:28,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 195 transitions, 1000 flow [2023-11-06 22:52:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:52:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:52:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2579 transitions. [2023-11-06 22:52:28,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797247023809524 [2023-11-06 22:52:28,932 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2579 transitions. [2023-11-06 22:52:28,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2579 transitions. [2023-11-06 22:52:28,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:28,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2579 transitions. [2023-11-06 22:52:28,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 92.10714285714286) internal successors, (2579), 28 states have internal predecessors, (2579), 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 22:52:28,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 192.0) internal successors, (5568), 29 states have internal predecessors, (5568), 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 22:52:28,957 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 192.0) internal successors, (5568), 29 states have internal predecessors, (5568), 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 22:52:28,957 INFO L175 Difference]: Start difference. First operand has 71 places, 35 transitions, 266 flow. Second operand 28 states and 2579 transitions. [2023-11-06 22:52:28,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 195 transitions, 1000 flow [2023-11-06 22:52:28,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 195 transitions, 896 flow, removed 41 selfloop flow, removed 11 redundant places. [2023-11-06 22:52:28,979 INFO L231 Difference]: Finished difference. Result has 91 places, 39 transitions, 266 flow [2023-11-06 22:52:28,980 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=28, PETRI_FLOW=266, PETRI_PLACES=91, PETRI_TRANSITIONS=39} [2023-11-06 22:52:28,982 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 73 predicate places. [2023-11-06 22:52:28,982 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 39 transitions, 266 flow [2023-11-06 22:52:28,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 86.20689655172414) internal successors, (2500), 29 states have internal predecessors, (2500), 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 22:52:28,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:28,984 INFO L208 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:28,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:29,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:29,191 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 22:52:29,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1182778397, now seen corresponding path program 5 times [2023-11-06 22:52:29,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:29,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121794352] [2023-11-06 22:52:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:29,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:32,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:32,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121794352] [2023-11-06 22:52:32,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121794352] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:32,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982859746] [2023-11-06 22:52:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:52:32,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:32,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:32,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902a10b3-8ca7-4975-aff2-e4aa1b35d5be/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:52:32,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-11-06 22:52:32,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:32,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-06 22:52:32,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:34,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:37,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982859746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:37,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:37,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2023-11-06 22:52:37,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087098591] [2023-11-06 22:52:37,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:37,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-11-06 22:52:37,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:37,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-11-06 22:52:37,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1193, Invalid=5613, Unknown=0, NotChecked=0, Total=6806 [2023-11-06 22:52:40,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 192 [2023-11-06 22:52:40,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 39 transitions, 266 flow. Second operand has 83 states, 83 states have (on average 81.1566265060241) internal successors, (6736), 83 states have internal predecessors, (6736), 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 22:52:40,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:40,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 192 [2023-11-06 22:52:40,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand