./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/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_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0bf2f5f336333cdf96c271b32cdeb9b70ee932e1c07acf27a63b4425ec902f3e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:45:56,660 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:45:56,796 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-06 22:45:56,806 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:45:56,807 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:45:56,851 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:45:56,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:45:56,853 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:45:56,854 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:45:56,859 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:45:56,860 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:45:56,861 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:45:56,861 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:45:56,863 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:45:56,864 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:45:56,864 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:45:56,865 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:45:56,865 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:45:56,866 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:45:56,866 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:45:56,867 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:45:56,868 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:45:56,868 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-06 22:45:56,869 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:45:56,869 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:45:56,870 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:45:56,870 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:45:56,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:45:56,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:45:56,872 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:45:56,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:45:56,874 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:45:56,874 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:45:56,875 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:45:56,875 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:45:56,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:45:56,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:45:56,876 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:45:56,876 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:45:56,877 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:45:56,877 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:45:56,877 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_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf2f5f336333cdf96c271b32cdeb9b70ee932e1c07acf27a63b4425ec902f3e [2023-11-06 22:45:57,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:45:57,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:45:57,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:45:57,312 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:45:57,312 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:45:57,314 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i [2023-11-06 22:46:00,447 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:46:00,892 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:46:00,892 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i [2023-11-06 22:46:00,925 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/data/c8f340f35/72a496c3e6ed48c48e986e526b9ab1dc/FLAGe3aa0ef81 [2023-11-06 22:46:00,943 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/data/c8f340f35/72a496c3e6ed48c48e986e526b9ab1dc [2023-11-06 22:46:00,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:46:00,951 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:46:00,954 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:46:00,955 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:46:00,961 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:46:00,962 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:00" (1/1) ... [2023-11-06 22:46:00,963 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e4ad891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:00, skipping insertion in model container [2023-11-06 22:46:00,963 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:00" (1/1) ... [2023-11-06 22:46:01,040 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:46:02,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:46:02,083 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:46:02,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:46:02,293 WARN L672 CHandler]: The function strerror is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:46:02,293 WARN L672 CHandler]: The function sleep is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:46:02,293 WARN L672 CHandler]: The function time is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:46:02,293 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:46:02,302 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:46:02,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02 WrapperNode [2023-11-06 22:46:02,303 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:46:02,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:46:02,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:46:02,304 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:46:02,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02" (1/1) ... [2023-11-06 22:46:02,357 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02" (1/1) ... [2023-11-06 22:46:02,404 INFO L138 Inliner]: procedures = 524, calls = 69, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 132 [2023-11-06 22:46:02,404 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:46:02,405 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:46:02,405 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:46:02,405 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:46:02,422 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02" (1/1) ... [2023-11-06 22:46:02,422 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02" (1/1) ... [2023-11-06 22:46:02,436 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02" (1/1) ... [2023-11-06 22:46:02,437 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02" (1/1) ... [2023-11-06 22:46:02,453 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02" (1/1) ... [2023-11-06 22:46:02,461 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02" (1/1) ... [2023-11-06 22:46:02,470 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02" (1/1) ... [2023-11-06 22:46:02,474 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02" (1/1) ... [2023-11-06 22:46:02,483 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:46:02,485 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:46:02,485 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:46:02,485 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:46:02,486 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02" (1/1) ... [2023-11-06 22:46:02,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:46:02,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:02,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:46:02,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:46:02,597 INFO L130 BoogieDeclarations]: Found specification of procedure counter_thread [2023-11-06 22:46:02,597 INFO L138 BoogieDeclarations]: Found implementation of procedure counter_thread [2023-11-06 22:46:02,598 INFO L130 BoogieDeclarations]: Found specification of procedure sleep [2023-11-06 22:46:02,598 INFO L130 BoogieDeclarations]: Found specification of procedure monitor_thread [2023-11-06 22:46:02,598 INFO L138 BoogieDeclarations]: Found implementation of procedure monitor_thread [2023-11-06 22:46:02,598 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2023-11-06 22:46:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:46:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:46:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:46:02,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:46:02,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:46:02,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:46:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure fprintf [2023-11-06 22:46:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:46:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-11-06 22:46:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure time [2023-11-06 22:46:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:46:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:46:02,606 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 22:46:03,062 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:46:03,064 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:46:03,407 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:46:03,424 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:46:03,424 INFO L302 CfgBuilder]: Removed 19 assume(true) statements. [2023-11-06 22:46:03,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:03 BoogieIcfgContainer [2023-11-06 22:46:03,428 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:46:03,432 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:46:03,433 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:46:03,436 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:46:03,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:00" (1/3) ... [2023-11-06 22:46:03,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211eb760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:03, skipping insertion in model container [2023-11-06 22:46:03,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:02" (2/3) ... [2023-11-06 22:46:03,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211eb760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:03, skipping insertion in model container [2023-11-06 22:46:03,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:03" (3/3) ... [2023-11-06 22:46:03,447 INFO L112 eAbstractionObserver]: Analyzing ICFG 04-mutex_36-trylock_nr.i [2023-11-06 22:46:03,457 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:46:03,469 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:46:03,469 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-06 22:46:03,469 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:46:03,622 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:46:03,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 251 transitions, 516 flow [2023-11-06 22:46:03,783 INFO L124 PetriNetUnfolderBase]: 32/249 cut-off events. [2023-11-06 22:46:03,784 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:46:03,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 249 events. 32/249 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 567 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 150. Up to 5 conditions per place. [2023-11-06 22:46:03,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 251 transitions, 516 flow [2023-11-06 22:46:03,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 220 transitions, 449 flow [2023-11-06 22:46:03,813 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:46:03,834 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 220 transitions, 449 flow [2023-11-06 22:46:03,843 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 220 transitions, 449 flow [2023-11-06 22:46:03,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 220 transitions, 449 flow [2023-11-06 22:46:03,941 INFO L124 PetriNetUnfolderBase]: 28/220 cut-off events. [2023-11-06 22:46:03,942 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:46:03,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 220 events. 28/220 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 499 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 150. Up to 5 conditions per place. [2023-11-06 22:46:03,959 INFO L119 LiptonReduction]: Number of co-enabled transitions 13862 [2023-11-06 22:46:21,573 INFO L134 LiptonReduction]: Checked pairs total: 15305 [2023-11-06 22:46:21,573 INFO L136 LiptonReduction]: Total number of compositions: 253 [2023-11-06 22:46:21,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:46:21,597 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;@30bebd57, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:46:21,597 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-06 22:46:21,598 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:46:21,599 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-06 22:46:21,599 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:46:21,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:21,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:46:21,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:21,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:21,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1033, now seen corresponding path program 1 times [2023-11-06 22:46:21,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:21,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224818415] [2023-11-06 22:46:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:21,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:21,886 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 22:46:21,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:21,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224818415] [2023-11-06 22:46:21,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224818415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:21,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:21,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:46:21,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024868879] [2023-11-06 22:46:21,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:21,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:46:21,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:21,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:46:21,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:46:21,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 504 [2023-11-06 22:46:21,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 50 transitions, 109 flow. Second operand has 2 states, 2 states have (on average 220.5) internal successors, (441), 2 states have internal predecessors, (441), 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 22:46:21,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:21,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 504 [2023-11-06 22:46:21,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:22,199 INFO L124 PetriNetUnfolderBase]: 328/595 cut-off events. [2023-11-06 22:46:22,199 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-06 22:46:22,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 595 events. 328/595 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 2816 event pairs, 234 based on Foata normal form. 79/340 useless extension candidates. Maximal degree in co-relation 1056. Up to 512 conditions per place. [2023-11-06 22:46:22,207 INFO L140 encePairwiseOnDemand]: 491/504 looper letters, 25 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2023-11-06 22:46:22,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 29 transitions, 117 flow [2023-11-06 22:46:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:46:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:46:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 478 transitions. [2023-11-06 22:46:22,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742063492063492 [2023-11-06 22:46:22,232 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 478 transitions. [2023-11-06 22:46:22,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 478 transitions. [2023-11-06 22:46:22,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:22,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 478 transitions. [2023-11-06 22:46:22,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 239.0) internal successors, (478), 2 states have internal predecessors, (478), 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 22:46:22,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 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 22:46:22,254 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 504.0) internal successors, (1512), 3 states have internal predecessors, (1512), 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 22:46:22,256 INFO L175 Difference]: Start difference. First operand has 39 places, 50 transitions, 109 flow. Second operand 2 states and 478 transitions. [2023-11-06 22:46:22,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 29 transitions, 117 flow [2023-11-06 22:46:22,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:46:22,263 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 62 flow [2023-11-06 22:46:22,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2023-11-06 22:46:22,271 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-11-06 22:46:22,272 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 62 flow [2023-11-06 22:46:22,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 220.5) internal successors, (441), 2 states have internal predecessors, (441), 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 22:46:22,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:22,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:46:22,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:46:22,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting counter_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:22,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash 978094350, now seen corresponding path program 1 times [2023-11-06 22:46:22,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:22,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415012109] [2023-11-06 22:46:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:22,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:22,612 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 22:46:22,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:22,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415012109] [2023-11-06 22:46:22,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415012109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:22,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:22,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:46:22,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911891646] [2023-11-06 22:46:22,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:22,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:22,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:22,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:22,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:22,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 504 [2023-11-06 22:46:22,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 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 22:46:22,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:22,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 504 [2023-11-06 22:46:22,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:22,808 INFO L124 PetriNetUnfolderBase]: 451/754 cut-off events. [2023-11-06 22:46:22,808 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 22:46:22,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 754 events. 451/754 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 3577 event pairs, 234 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 1481. Up to 512 conditions per place. [2023-11-06 22:46:22,815 INFO L140 encePairwiseOnDemand]: 500/504 looper letters, 39 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-06 22:46:22,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 45 transitions, 178 flow [2023-11-06 22:46:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:22,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2023-11-06 22:46:22,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45701058201058203 [2023-11-06 22:46:22,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2023-11-06 22:46:22,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2023-11-06 22:46:22,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:22,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2023-11-06 22:46:22,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 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 22:46:22,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 22:46:22,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 22:46:22,832 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 62 flow. Second operand 3 states and 691 transitions. [2023-11-06 22:46:22,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 45 transitions, 178 flow [2023-11-06 22:46:22,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:46:22,835 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 76 flow [2023-11-06 22:46:22,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-06 22:46:22,836 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -6 predicate places. [2023-11-06 22:46:22,837 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 76 flow [2023-11-06 22:46:22,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 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 22:46:22,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:22,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:46:22,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:46:22,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:22,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:22,840 INFO L85 PathProgramCache]: Analyzing trace with hash 978094271, now seen corresponding path program 1 times [2023-11-06 22:46:22,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:22,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430064162] [2023-11-06 22:46:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:22,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:22,966 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 22:46:22,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:22,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430064162] [2023-11-06 22:46:22,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430064162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:22,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:22,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:46:22,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981386192] [2023-11-06 22:46:22,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:22,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:22,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:22,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:22,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 504 [2023-11-06 22:46:22,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 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 22:46:22,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:22,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 504 [2023-11-06 22:46:22,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:23,234 INFO L124 PetriNetUnfolderBase]: 690/1113 cut-off events. [2023-11-06 22:46:23,234 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2023-11-06 22:46:23,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2486 conditions, 1113 events. 690/1113 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5044 event pairs, 181 based on Foata normal form. 52/695 useless extension candidates. Maximal degree in co-relation 2481. Up to 822 conditions per place. [2023-11-06 22:46:23,243 INFO L140 encePairwiseOnDemand]: 498/504 looper letters, 44 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-11-06 22:46:23,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 48 transitions, 213 flow [2023-11-06 22:46:23,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 697 transitions. [2023-11-06 22:46:23,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.460978835978836 [2023-11-06 22:46:23,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 697 transitions. [2023-11-06 22:46:23,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 697 transitions. [2023-11-06 22:46:23,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:23,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 697 transitions. [2023-11-06 22:46:23,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 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 22:46:23,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 22:46:23,257 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 22:46:23,257 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 76 flow. Second operand 3 states and 697 transitions. [2023-11-06 22:46:23,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 48 transitions, 213 flow [2023-11-06 22:46:23,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 48 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:46:23,261 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 94 flow [2023-11-06 22:46:23,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-06 22:46:23,262 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2023-11-06 22:46:23,262 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 94 flow [2023-11-06 22:46:23,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 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 22:46:23,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:23,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:46:23,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:46:23,264 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:23,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash 258267117, now seen corresponding path program 1 times [2023-11-06 22:46:23,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:23,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550812165] [2023-11-06 22:46:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:23,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:23,377 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 22:46:23,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:23,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550812165] [2023-11-06 22:46:23,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550812165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:23,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:23,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:46:23,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029200551] [2023-11-06 22:46:23,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:23,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:23,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:23,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:23,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:23,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 504 [2023-11-06 22:46:23,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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 22:46:23,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:23,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 504 [2023-11-06 22:46:23,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:23,696 INFO L124 PetriNetUnfolderBase]: 981/1770 cut-off events. [2023-11-06 22:46:23,696 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2023-11-06 22:46:23,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 1770 events. 981/1770 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 10674 event pairs, 480 based on Foata normal form. 0/1100 useless extension candidates. Maximal degree in co-relation 3980. Up to 962 conditions per place. [2023-11-06 22:46:23,709 INFO L140 encePairwiseOnDemand]: 500/504 looper letters, 44 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-11-06 22:46:23,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 50 transitions, 246 flow [2023-11-06 22:46:23,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:23,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 698 transitions. [2023-11-06 22:46:23,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46164021164021163 [2023-11-06 22:46:23,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 698 transitions. [2023-11-06 22:46:23,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 698 transitions. [2023-11-06 22:46:23,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:23,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 698 transitions. [2023-11-06 22:46:23,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 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 22:46:23,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 22:46:23,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 22:46:23,722 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 94 flow. Second operand 3 states and 698 transitions. [2023-11-06 22:46:23,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 50 transitions, 246 flow [2023-11-06 22:46:23,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:46:23,726 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 106 flow [2023-11-06 22:46:23,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-06 22:46:23,729 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-11-06 22:46:23,730 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 106 flow [2023-11-06 22:46:23,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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 22:46:23,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:23,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:46:23,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:46:23,731 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:23,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash 256154649, now seen corresponding path program 1 times [2023-11-06 22:46:23,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:23,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253663718] [2023-11-06 22:46:23,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:23,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:23,890 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 22:46:23,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:23,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253663718] [2023-11-06 22:46:23,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253663718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:23,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023299013] [2023-11-06 22:46:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:23,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:23,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:23,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:23,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:46:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:24,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:46:24,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:24,146 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 22:46:24,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:24,169 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 22:46:24,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023299013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:24,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:24,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-06 22:46:24,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871953309] [2023-11-06 22:46:24,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:24,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:46:24,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:46:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:46:24,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 504 [2023-11-06 22:46:24,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 106 flow. Second operand has 7 states, 7 states have (on average 218.42857142857142) internal successors, (1529), 7 states have internal predecessors, (1529), 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 22:46:24,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:24,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 504 [2023-11-06 22:46:24,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:24,899 INFO L124 PetriNetUnfolderBase]: 2687/4082 cut-off events. [2023-11-06 22:46:24,899 INFO L125 PetriNetUnfolderBase]: For 867/873 co-relation queries the response was YES. [2023-11-06 22:46:24,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10569 conditions, 4082 events. 2687/4082 cut-off events. For 867/873 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21025 event pairs, 239 based on Foata normal form. 114/2776 useless extension candidates. Maximal degree in co-relation 10562. Up to 1117 conditions per place. [2023-11-06 22:46:24,934 INFO L140 encePairwiseOnDemand]: 497/504 looper letters, 122 selfloop transitions, 22 changer transitions 0/146 dead transitions. [2023-11-06 22:46:24,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 146 transitions, 763 flow [2023-11-06 22:46:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:46:24,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:46:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1653 transitions. [2023-11-06 22:46:24,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685374149659864 [2023-11-06 22:46:24,941 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1653 transitions. [2023-11-06 22:46:24,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1653 transitions. [2023-11-06 22:46:24,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:24,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1653 transitions. [2023-11-06 22:46:24,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 236.14285714285714) internal successors, (1653), 7 states have internal predecessors, (1653), 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 22:46:24,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 504.0) internal successors, (4032), 8 states have internal predecessors, (4032), 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 22:46:24,961 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 504.0) internal successors, (4032), 8 states have internal predecessors, (4032), 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 22:46:24,961 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 106 flow. Second operand 7 states and 1653 transitions. [2023-11-06 22:46:24,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 146 transitions, 763 flow [2023-11-06 22:46:24,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 146 transitions, 751 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:46:24,968 INFO L231 Difference]: Finished difference. Result has 46 places, 52 transitions, 298 flow [2023-11-06 22:46:24,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=298, PETRI_PLACES=46, PETRI_TRANSITIONS=52} [2023-11-06 22:46:24,969 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-11-06 22:46:24,969 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 52 transitions, 298 flow [2023-11-06 22:46:24,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 218.42857142857142) internal successors, (1529), 7 states have internal predecessors, (1529), 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 22:46:24,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:24,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:46:24,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:25,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:25,178 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting counter_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:25,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:25,179 INFO L85 PathProgramCache]: Analyzing trace with hash 256154648, now seen corresponding path program 1 times [2023-11-06 22:46:25,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:25,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771367386] [2023-11-06 22:46:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:25,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:25,287 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 22:46:25,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:25,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771367386] [2023-11-06 22:46:25,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771367386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:25,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497922500] [2023-11-06 22:46:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:25,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:25,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:25,289 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:25,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:46:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:25,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:46:25,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:25,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:46:25,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497922500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:25,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:46:25,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-11-06 22:46:25,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225255158] [2023-11-06 22:46:25,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:46:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:46:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:46:25,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 504 [2023-11-06 22:46:25,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 52 transitions, 298 flow. Second operand has 4 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 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 22:46:25,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:25,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 504 [2023-11-06 22:46:25,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:25,957 INFO L124 PetriNetUnfolderBase]: 1991/3096 cut-off events. [2023-11-06 22:46:25,958 INFO L125 PetriNetUnfolderBase]: For 3235/3247 co-relation queries the response was YES. [2023-11-06 22:46:25,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9101 conditions, 3096 events. 1991/3096 cut-off events. For 3235/3247 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15929 event pairs, 239 based on Foata normal form. 454/2556 useless extension candidates. Maximal degree in co-relation 9090. Up to 2634 conditions per place. [2023-11-06 22:46:25,994 INFO L140 encePairwiseOnDemand]: 500/504 looper letters, 53 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-06 22:46:25,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 359 flow [2023-11-06 22:46:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:46:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:46:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 909 transitions. [2023-11-06 22:46:26,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45089285714285715 [2023-11-06 22:46:26,000 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 909 transitions. [2023-11-06 22:46:26,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 909 transitions. [2023-11-06 22:46:26,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:26,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 909 transitions. [2023-11-06 22:46:26,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 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 22:46:26,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 504.0) internal successors, (2520), 5 states have internal predecessors, (2520), 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 22:46:26,012 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 504.0) internal successors, (2520), 5 states have internal predecessors, (2520), 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 22:46:26,012 INFO L175 Difference]: Start difference. First operand has 46 places, 52 transitions, 298 flow. Second operand 4 states and 909 transitions. [2023-11-06 22:46:26,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 359 flow [2023-11-06 22:46:26,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 57 transitions, 347 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-06 22:46:26,030 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 190 flow [2023-11-06 22:46:26,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-11-06 22:46:26,031 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2023-11-06 22:46:26,031 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 190 flow [2023-11-06 22:46:26,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 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 22:46:26,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:26,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:46:26,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:26,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:46:26,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting counter_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:26,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:26,241 INFO L85 PathProgramCache]: Analyzing trace with hash 256154728, now seen corresponding path program 1 times [2023-11-06 22:46:26,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:26,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055532813] [2023-11-06 22:46:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:26,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:26,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:26,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055532813] [2023-11-06 22:46:26,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055532813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:26,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:26,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:46:26,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763557834] [2023-11-06 22:46:26,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:26,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:26,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:26,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:26,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:26,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 504 [2023-11-06 22:46:26,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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 22:46:26,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:26,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 504 [2023-11-06 22:46:26,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:26,743 INFO L124 PetriNetUnfolderBase]: 1701/2658 cut-off events. [2023-11-06 22:46:26,744 INFO L125 PetriNetUnfolderBase]: For 880/940 co-relation queries the response was YES. [2023-11-06 22:46:26,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7422 conditions, 2658 events. 1701/2658 cut-off events. For 880/940 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 13416 event pairs, 162 based on Foata normal form. 0/1924 useless extension candidates. Maximal degree in co-relation 7411. Up to 2290 conditions per place. [2023-11-06 22:46:26,769 INFO L140 encePairwiseOnDemand]: 502/504 looper letters, 49 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-06 22:46:26,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 312 flow [2023-11-06 22:46:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 689 transitions. [2023-11-06 22:46:26,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4556878306878307 [2023-11-06 22:46:26,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 689 transitions. [2023-11-06 22:46:26,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 689 transitions. [2023-11-06 22:46:26,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:26,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 689 transitions. [2023-11-06 22:46:26,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.66666666666666) internal successors, (689), 3 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:46:26,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 22:46:26,780 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 22:46:26,780 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 190 flow. Second operand 3 states and 689 transitions. [2023-11-06 22:46:26,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 312 flow [2023-11-06 22:46:26,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:46:26,787 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 167 flow [2023-11-06 22:46:26,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-11-06 22:46:26,788 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2023-11-06 22:46:26,788 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 167 flow [2023-11-06 22:46:26,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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 22:46:26,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:26,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:26,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:46:26,789 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:26,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:26,790 INFO L85 PathProgramCache]: Analyzing trace with hash -583652036, now seen corresponding path program 1 times [2023-11-06 22:46:26,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:26,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998922098] [2023-11-06 22:46:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:26,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:46:26,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:26,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998922098] [2023-11-06 22:46:26,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998922098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:46:26,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:46:26,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:46:26,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604885340] [2023-11-06 22:46:26,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:46:26,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:46:26,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:46:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:46:26,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 504 [2023-11-06 22:46:26,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 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 22:46:26,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:26,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 504 [2023-11-06 22:46:26,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:27,301 INFO L124 PetriNetUnfolderBase]: 1569/2740 cut-off events. [2023-11-06 22:46:27,301 INFO L125 PetriNetUnfolderBase]: For 2775/2775 co-relation queries the response was YES. [2023-11-06 22:46:27,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7373 conditions, 2740 events. 1569/2740 cut-off events. For 2775/2775 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16980 event pairs, 105 based on Foata normal form. 0/2118 useless extension candidates. Maximal degree in co-relation 7362. Up to 2118 conditions per place. [2023-11-06 22:46:27,325 INFO L140 encePairwiseOnDemand]: 502/504 looper letters, 50 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-06 22:46:27,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 374 flow [2023-11-06 22:46:27,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:46:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:46:27,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 687 transitions. [2023-11-06 22:46:27,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45436507936507936 [2023-11-06 22:46:27,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 687 transitions. [2023-11-06 22:46:27,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 687 transitions. [2023-11-06 22:46:27,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:27,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 687 transitions. [2023-11-06 22:46:27,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:46:27,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 22:46:27,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 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 22:46:27,337 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 167 flow. Second operand 3 states and 687 transitions. [2023-11-06 22:46:27,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 374 flow [2023-11-06 22:46:27,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:46:27,341 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 165 flow [2023-11-06 22:46:27,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2023-11-06 22:46:27,342 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2023-11-06 22:46:27,343 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 165 flow [2023-11-06 22:46:27,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 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 22:46:27,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:27,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:27,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:46:27,344 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:27,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:27,344 INFO L85 PathProgramCache]: Analyzing trace with hash -583652016, now seen corresponding path program 1 times [2023-11-06 22:46:27,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:27,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309044409] [2023-11-06 22:46:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:27,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:27,453 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 22:46:27,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:27,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309044409] [2023-11-06 22:46:27,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309044409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:27,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440568943] [2023-11-06 22:46:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:27,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:27,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:27,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:27,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:46:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:27,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:46:27,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:27,644 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 22:46:27,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:27,664 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 22:46:27,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440568943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:27,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:27,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:46:27,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247473423] [2023-11-06 22:46:27,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:27,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:46:27,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:27,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:46:27,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:46:27,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 504 [2023-11-06 22:46:27,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 165 flow. Second operand has 7 states, 7 states have (on average 219.71428571428572) internal successors, (1538), 7 states have internal predecessors, (1538), 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 22:46:27,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:27,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 504 [2023-11-06 22:46:27,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:28,603 INFO L124 PetriNetUnfolderBase]: 3408/6007 cut-off events. [2023-11-06 22:46:28,604 INFO L125 PetriNetUnfolderBase]: For 6319/6319 co-relation queries the response was YES. [2023-11-06 22:46:28,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15835 conditions, 6007 events. 3408/6007 cut-off events. For 6319/6319 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 41985 event pairs, 696 based on Foata normal form. 0/4665 useless extension candidates. Maximal degree in co-relation 15823. Up to 1480 conditions per place. [2023-11-06 22:46:28,661 INFO L140 encePairwiseOnDemand]: 501/504 looper letters, 122 selfloop transitions, 5 changer transitions 0/130 dead transitions. [2023-11-06 22:46:28,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 130 transitions, 899 flow [2023-11-06 22:46:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:46:28,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:46:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1393 transitions. [2023-11-06 22:46:28,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46064814814814814 [2023-11-06 22:46:28,669 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1393 transitions. [2023-11-06 22:46:28,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1393 transitions. [2023-11-06 22:46:28,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:28,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1393 transitions. [2023-11-06 22:46:28,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 232.16666666666666) internal successors, (1393), 6 states have internal predecessors, (1393), 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 22:46:28,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 504.0) internal successors, (3528), 7 states have internal predecessors, (3528), 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 22:46:28,684 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 504.0) internal successors, (3528), 7 states have internal predecessors, (3528), 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 22:46:28,684 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 165 flow. Second operand 6 states and 1393 transitions. [2023-11-06 22:46:28,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 130 transitions, 899 flow [2023-11-06 22:46:28,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 130 transitions, 898 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:46:28,695 INFO L231 Difference]: Finished difference. Result has 52 places, 38 transitions, 200 flow [2023-11-06 22:46:28,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2023-11-06 22:46:28,699 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 13 predicate places. [2023-11-06 22:46:28,699 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 200 flow [2023-11-06 22:46:28,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 219.71428571428572) internal successors, (1538), 7 states have internal predecessors, (1538), 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 22:46:28,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:28,702 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-06 22:46:28,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:28,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:28,910 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:28,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:28,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1050439873, now seen corresponding path program 2 times [2023-11-06 22:46:28,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:28,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153002620] [2023-11-06 22:46:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:28,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:29,132 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 22:46:29,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:29,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153002620] [2023-11-06 22:46:29,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153002620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:29,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610800665] [2023-11-06 22:46:29,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:46:29,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:29,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:29,136 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:29,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:46:29,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:46:29,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:29,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:46:29,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:29,337 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 22:46:29,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:29,427 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 22:46:29,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610800665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:29,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:29,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:46:29,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887189746] [2023-11-06 22:46:29,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:29,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:46:29,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:29,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:46:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:46:29,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 504 [2023-11-06 22:46:29,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 38 transitions, 200 flow. Second operand has 13 states, 13 states have (on average 217.76923076923077) internal successors, (2831), 13 states have internal predecessors, (2831), 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 22:46:29,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:29,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 504 [2023-11-06 22:46:29,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:31,458 INFO L124 PetriNetUnfolderBase]: 7348/11233 cut-off events. [2023-11-06 22:46:31,458 INFO L125 PetriNetUnfolderBase]: For 17421/17451 co-relation queries the response was YES. [2023-11-06 22:46:31,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33051 conditions, 11233 events. 7348/11233 cut-off events. For 17421/17451 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 64789 event pairs, 499 based on Foata normal form. 1278/9804 useless extension candidates. Maximal degree in co-relation 33036. Up to 2253 conditions per place. [2023-11-06 22:46:31,553 INFO L140 encePairwiseOnDemand]: 500/504 looper letters, 236 selfloop transitions, 20 changer transitions 0/258 dead transitions. [2023-11-06 22:46:31,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 258 transitions, 1686 flow [2023-11-06 22:46:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:46:31,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:46:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2806 transitions. [2023-11-06 22:46:31,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46395502645502645 [2023-11-06 22:46:31,565 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2806 transitions. [2023-11-06 22:46:31,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2806 transitions. [2023-11-06 22:46:31,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:31,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2806 transitions. [2023-11-06 22:46:31,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 233.83333333333334) internal successors, (2806), 12 states have internal predecessors, (2806), 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 22:46:31,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 504.0) internal successors, (6552), 13 states have internal predecessors, (6552), 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 22:46:31,604 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 504.0) internal successors, (6552), 13 states have internal predecessors, (6552), 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 22:46:31,604 INFO L175 Difference]: Start difference. First operand has 52 places, 38 transitions, 200 flow. Second operand 12 states and 2806 transitions. [2023-11-06 22:46:31,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 258 transitions, 1686 flow [2023-11-06 22:46:31,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 258 transitions, 1598 flow, removed 33 selfloop flow, removed 1 redundant places. [2023-11-06 22:46:31,639 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 368 flow [2023-11-06 22:46:31,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2023-11-06 22:46:31,641 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 29 predicate places. [2023-11-06 22:46:31,642 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 368 flow [2023-11-06 22:46:31,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 217.76923076923077) internal successors, (2831), 13 states have internal predecessors, (2831), 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 22:46:31,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:31,644 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:31,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:31,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:46:31,853 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:31,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:31,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1548274751, now seen corresponding path program 2 times [2023-11-06 22:46:31,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:31,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481027242] [2023-11-06 22:46:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:31,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:32,074 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 22:46:32,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:32,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481027242] [2023-11-06 22:46:32,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481027242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:32,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697839242] [2023-11-06 22:46:32,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:46:32,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:32,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:32,077 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:32,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:46:32,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:46:32,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:32,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:46:32,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:32,285 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 22:46:32,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:32,364 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 22:46:32,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697839242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:32,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:32,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:46:32,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366687341] [2023-11-06 22:46:32,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:32,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:46:32,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:32,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:46:32,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:46:32,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 504 [2023-11-06 22:46:32,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 219.3846153846154) internal successors, (2852), 13 states have internal predecessors, (2852), 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 22:46:32,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:32,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 504 [2023-11-06 22:46:32,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:36,667 INFO L124 PetriNetUnfolderBase]: 15000/26239 cut-off events. [2023-11-06 22:46:36,667 INFO L125 PetriNetUnfolderBase]: For 67553/67553 co-relation queries the response was YES. [2023-11-06 22:46:36,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76490 conditions, 26239 events. 15000/26239 cut-off events. For 67553/67553 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 211667 event pairs, 1476 based on Foata normal form. 960/21517 useless extension candidates. Maximal degree in co-relation 76468. Up to 4545 conditions per place. [2023-11-06 22:46:36,927 INFO L140 encePairwiseOnDemand]: 501/504 looper letters, 392 selfloop transitions, 11 changer transitions 0/406 dead transitions. [2023-11-06 22:46:36,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 406 transitions, 4000 flow [2023-11-06 22:46:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:46:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:46:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2794 transitions. [2023-11-06 22:46:36,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4619708994708995 [2023-11-06 22:46:36,940 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2794 transitions. [2023-11-06 22:46:36,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2794 transitions. [2023-11-06 22:46:36,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:36,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2794 transitions. [2023-11-06 22:46:36,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 232.83333333333334) internal successors, (2794), 12 states have internal predecessors, (2794), 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 22:46:36,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 504.0) internal successors, (6552), 13 states have internal predecessors, (6552), 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 22:46:36,971 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 504.0) internal successors, (6552), 13 states have internal predecessors, (6552), 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 22:46:36,971 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 368 flow. Second operand 12 states and 2794 transitions. [2023-11-06 22:46:36,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 406 transitions, 4000 flow [2023-11-06 22:46:37,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 406 transitions, 3404 flow, removed 220 selfloop flow, removed 5 redundant places. [2023-11-06 22:46:37,066 INFO L231 Difference]: Finished difference. Result has 80 places, 56 transitions, 396 flow [2023-11-06 22:46:37,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=396, PETRI_PLACES=80, PETRI_TRANSITIONS=56} [2023-11-06 22:46:37,067 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 41 predicate places. [2023-11-06 22:46:37,067 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 56 transitions, 396 flow [2023-11-06 22:46:37,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 219.3846153846154) internal successors, (2852), 13 states have internal predecessors, (2852), 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 22:46:37,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:37,069 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-06 22:46:37,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:37,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:37,276 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:37,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:37,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1763082495, now seen corresponding path program 3 times [2023-11-06 22:46:37,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:37,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689604237] [2023-11-06 22:46:37,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:37,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:37,682 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 22:46:37,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:37,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689604237] [2023-11-06 22:46:37,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689604237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:37,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718380824] [2023-11-06 22:46:37,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:46:37,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:37,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:37,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:37,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:46:37,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:46:37,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:37,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:46:37,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:37,929 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 22:46:37,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:38,217 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 22:46:38,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718380824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:38,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:38,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-06 22:46:38,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019619013] [2023-11-06 22:46:38,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:38,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:46:38,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:38,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:46:38,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:46:38,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 504 [2023-11-06 22:46:38,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 56 transitions, 396 flow. Second operand has 25 states, 25 states have (on average 217.4) internal successors, (5435), 25 states have internal predecessors, (5435), 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 22:46:38,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:38,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 504 [2023-11-06 22:46:38,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:46:45,407 INFO L124 PetriNetUnfolderBase]: 31114/46999 cut-off events. [2023-11-06 22:46:45,408 INFO L125 PetriNetUnfolderBase]: For 326056/326122 co-relation queries the response was YES. [2023-11-06 22:46:45,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143994 conditions, 46999 events. 31114/46999 cut-off events. For 326056/326122 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 303324 event pairs, 1057 based on Foata normal form. 5298/40560 useless extension candidates. Maximal degree in co-relation 143966. Up to 9687 conditions per place. [2023-11-06 22:46:45,753 INFO L140 encePairwiseOnDemand]: 500/504 looper letters, 626 selfloop transitions, 44 changer transitions 0/672 dead transitions. [2023-11-06 22:46:45,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 672 transitions, 5546 flow [2023-11-06 22:46:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:46:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:46:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5626 transitions. [2023-11-06 22:46:45,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511243386243384 [2023-11-06 22:46:45,774 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5626 transitions. [2023-11-06 22:46:45,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5626 transitions. [2023-11-06 22:46:45,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:46:45,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5626 transitions. [2023-11-06 22:46:45,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 234.41666666666666) internal successors, (5626), 24 states have internal predecessors, (5626), 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 22:46:45,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 504.0) internal successors, (12600), 25 states have internal predecessors, (12600), 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 22:46:45,816 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 504.0) internal successors, (12600), 25 states have internal predecessors, (12600), 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 22:46:45,816 INFO L175 Difference]: Start difference. First operand has 80 places, 56 transitions, 396 flow. Second operand 24 states and 5626 transitions. [2023-11-06 22:46:45,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 672 transitions, 5546 flow [2023-11-06 22:46:46,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 672 transitions, 4718 flow, removed 299 selfloop flow, removed 5 redundant places. [2023-11-06 22:46:46,061 INFO L231 Difference]: Finished difference. Result has 110 places, 80 transitions, 716 flow [2023-11-06 22:46:46,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=716, PETRI_PLACES=110, PETRI_TRANSITIONS=80} [2023-11-06 22:46:46,063 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 71 predicate places. [2023-11-06 22:46:46,063 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 80 transitions, 716 flow [2023-11-06 22:46:46,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 217.4) internal successors, (5435), 25 states have internal predecessors, (5435), 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 22:46:46,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:46:46,065 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-06 22:46:46,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:46:46,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:46:46,266 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:46:46,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:46:46,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1521976991, now seen corresponding path program 3 times [2023-11-06 22:46:46,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:46:46,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472574400] [2023-11-06 22:46:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:46:46,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:46:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:46:46,583 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 22:46:46,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:46:46,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472574400] [2023-11-06 22:46:46,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472574400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:46:46,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668830198] [2023-11-06 22:46:46,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:46:46,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:46:46,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:46:46,587 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:46:46,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:46:46,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:46:46,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:46:46,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:46:46,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:46:46,838 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 22:46:46,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:46:47,118 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 22:46:47,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668830198] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:46:47,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:46:47,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-06 22:46:47,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915154318] [2023-11-06 22:46:47,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:46:47,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:46:47,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:46:47,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:46:47,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:46:47,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 504 [2023-11-06 22:46:47,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 80 transitions, 716 flow. Second operand has 25 states, 25 states have (on average 219.2) internal successors, (5480), 25 states have internal predecessors, (5480), 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 22:46:47,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:47,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 504 [2023-11-06 22:46:47,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:47:04,042 INFO L124 PetriNetUnfolderBase]: 62808/109471 cut-off events. [2023-11-06 22:47:04,042 INFO L125 PetriNetUnfolderBase]: For 577703/577703 co-relation queries the response was YES. [2023-11-06 22:47:04,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323006 conditions, 109471 events. 62808/109471 cut-off events. For 577703/577703 co-relation queries the response was YES. Maximal size of possible extension queue 1855. Compared 981282 event pairs, 3036 based on Foata normal form. 3936/89389 useless extension candidates. Maximal degree in co-relation 322966. Up to 19449 conditions per place. [2023-11-06 22:47:04,905 INFO L140 encePairwiseOnDemand]: 501/504 looper letters, 1364 selfloop transitions, 23 changer transitions 0/1390 dead transitions. [2023-11-06 22:47:04,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 1390 transitions, 15772 flow [2023-11-06 22:47:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:47:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:47:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5596 transitions. [2023-11-06 22:47:04,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4626322751322751 [2023-11-06 22:47:04,931 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5596 transitions. [2023-11-06 22:47:04,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5596 transitions. [2023-11-06 22:47:04,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:47:04,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5596 transitions. [2023-11-06 22:47:04,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 233.16666666666666) internal successors, (5596), 24 states have internal predecessors, (5596), 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 22:47:04,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 504.0) internal successors, (12600), 25 states have internal predecessors, (12600), 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 22:47:04,988 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 504.0) internal successors, (12600), 25 states have internal predecessors, (12600), 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 22:47:04,989 INFO L175 Difference]: Start difference. First operand has 110 places, 80 transitions, 716 flow. Second operand 24 states and 5596 transitions. [2023-11-06 22:47:04,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 1390 transitions, 15772 flow [2023-11-06 22:47:05,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 1390 transitions, 13148 flow, removed 874 selfloop flow, removed 11 redundant places. [2023-11-06 22:47:05,738 INFO L231 Difference]: Finished difference. Result has 134 places, 92 transitions, 768 flow [2023-11-06 22:47:05,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=768, PETRI_PLACES=134, PETRI_TRANSITIONS=92} [2023-11-06 22:47:05,739 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 95 predicate places. [2023-11-06 22:47:05,739 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 92 transitions, 768 flow [2023-11-06 22:47:05,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 219.2) internal successors, (5480), 25 states have internal predecessors, (5480), 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 22:47:05,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:47:05,741 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1] [2023-11-06 22:47:05,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:47:05,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:47:05,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-06 22:47:05,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:47:05,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1439921279, now seen corresponding path program 4 times [2023-11-06 22:47:05,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:47:05,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727490943] [2023-11-06 22:47:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:47:05,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:47:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:47:06,739 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 22:47:06,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:47:06,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727490943] [2023-11-06 22:47:06,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727490943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:47:06,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624443223] [2023-11-06 22:47:06,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:47:06,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:47:06,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:47:06,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:47:06,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f771e8b-cd2e-4176-9a90-fa4251ea40e2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:47:06,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:47:06,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:47:06,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:47:06,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:47:06,991 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 22:47:06,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:47:08,153 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 22:47:08,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624443223] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:47:08,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:47:08,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2023-11-06 22:47:08,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775363583] [2023-11-06 22:47:08,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:47:08,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 22:47:08,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:47:08,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 22:47:08,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 22:47:08,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 504 [2023-11-06 22:47:08,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 92 transitions, 768 flow. Second operand has 49 states, 49 states have (on average 217.20408163265307) internal successors, (10643), 49 states have internal predecessors, (10643), 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 22:47:08,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:47:08,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 504 [2023-11-06 22:47:08,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand