./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 21325645cf7d2c394d0eaa1628a16a96624f1addcdd1b56c7e8aa2473acfaf07 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:54:07,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:54:07,508 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:54:07,514 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:54:07,515 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:54:07,559 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:54:07,561 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:54:07,562 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:54:07,563 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:54:07,568 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:54:07,569 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:54:07,570 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:54:07,570 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:54:07,572 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:54:07,573 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:54:07,573 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:54:07,574 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:54:07,574 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:54:07,575 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:54:07,575 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:54:07,576 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:54:07,576 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:54:07,577 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:54:07,577 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:54:07,578 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:54:07,578 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:54:07,578 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:54:07,579 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:54:07,580 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:54:07,580 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:54:07,582 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:54:07,582 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:54:07,582 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:54:07,582 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:54:07,583 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:54:07,583 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:54:07,583 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:54:07,583 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:54:07,584 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:54:07,584 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:54:07,584 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:54:07,584 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:54:07,585 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_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21325645cf7d2c394d0eaa1628a16a96624f1addcdd1b56c7e8aa2473acfaf07 [2023-11-26 11:54:07,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:54:07,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:54:07,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:54:07,923 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:54:07,923 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:54:07,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2023-11-26 11:54:11,249 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:54:11,453 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:54:11,453 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2023-11-26 11:54:11,463 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/data/f3e591955/44fe98a878bc4aa9be565881f125a350/FLAG1b151ec7f [2023-11-26 11:54:11,479 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/data/f3e591955/44fe98a878bc4aa9be565881f125a350 [2023-11-26 11:54:11,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:54:11,483 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:54:11,485 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:54:11,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:54:11,493 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:54:11,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,496 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@481d311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11, skipping insertion in model container [2023-11-26 11:54:11,496 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,525 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:54:11,744 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c[2703,2716] [2023-11-26 11:54:11,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:54:11,762 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:54:11,797 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c[2703,2716] [2023-11-26 11:54:11,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:54:11,817 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:54:11,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11 WrapperNode [2023-11-26 11:54:11,818 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:54:11,819 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:54:11,820 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:54:11,820 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:54:11,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,851 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,882 INFO L138 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 131 [2023-11-26 11:54:11,888 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:54:11,888 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:54:11,889 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:54:11,889 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:54:11,901 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,905 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,926 INFO L175 MemorySlicer]: Split 14 memory accesses to 7 slices as follows [2, 2, 2, 2, 2, 2, 2]. 14 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 1, 1, 1, 1]. [2023-11-26 11:54:11,926 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,926 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,936 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,940 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,944 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,946 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,950 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:54:11,951 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:54:11,952 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:54:11,952 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:54:11,953 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (1/1) ... [2023-11-26 11:54:11,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:54:11,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:11,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:54:12,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:54:12,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:54:12,042 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:54:12,043 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:54:12,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:54:12,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:54:12,044 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 11:54:12,044 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 11:54:12,045 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-26 11:54:12,047 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-26 11:54:12,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:54:12,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:54:12,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:54:12,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:54:12,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:54:12,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-26 11:54:12,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-26 11:54:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-26 11:54:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-26 11:54:12,052 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-26 11:54:12,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-26 11:54:12,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:54:12,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:54:12,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:54:12,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:54:12,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:54:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:54:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-26 11:54:12,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-26 11:54:12,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:54:12,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:54:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:54:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:54:12,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:54:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:54:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:54:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-26 11:54:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-26 11:54:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:54:12,060 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:54:12,339 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:54:12,343 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:54:12,746 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:54:13,201 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:54:13,201 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-26 11:54:13,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:54:13 BoogieIcfgContainer [2023-11-26 11:54:13,203 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:54:13,208 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:54:13,208 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:54:13,213 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:54:13,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:54:11" (1/3) ... [2023-11-26 11:54:13,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145371d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:54:13, skipping insertion in model container [2023-11-26 11:54:13,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:54:11" (2/3) ... [2023-11-26 11:54:13,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145371d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:54:13, skipping insertion in model container [2023-11-26 11:54:13,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:54:13" (3/3) ... [2023-11-26 11:54:13,223 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2023-11-26 11:54:13,244 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:54:13,259 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:54:13,259 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:54:13,259 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:54:13,377 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-11-26 11:54:13,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 144 flow [2023-11-26 11:54:13,517 INFO L124 PetriNetUnfolderBase]: 6/45 cut-off events. [2023-11-26 11:54:13,518 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-26 11:54:13,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 45 events. 6/45 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 31 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-11-26 11:54:13,524 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 144 flow [2023-11-26 11:54:13,529 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 124 flow [2023-11-26 11:54:13,542 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:54:13,551 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=LoopHeads, 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;@95a2760, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:54:13,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-26 11:54:13,584 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:54:13,584 INFO L124 PetriNetUnfolderBase]: 6/43 cut-off events. [2023-11-26 11:54:13,584 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-26 11:54:13,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:13,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:13,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:54:13,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:13,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1410993307, now seen corresponding path program 1 times [2023-11-26 11:54:13,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:13,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177123793] [2023-11-26 11:54:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:13,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:14,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:14,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177123793] [2023-11-26 11:54:14,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177123793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:14,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:14,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:54:14,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886740571] [2023-11-26 11:54:14,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:14,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:54:14,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:14,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:54:14,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:54:14,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-26 11:54:14,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2023-11-26 11:54:14,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:14,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-26 11:54:14,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:17,829 INFO L124 PetriNetUnfolderBase]: 21341/24683 cut-off events. [2023-11-26 11:54:17,830 INFO L125 PetriNetUnfolderBase]: For 1387/1387 co-relation queries the response was YES. [2023-11-26 11:54:17,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50579 conditions, 24683 events. 21341/24683 cut-off events. For 1387/1387 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 79585 event pairs, 1773 based on Foata normal form. 1/13573 useless extension candidates. Maximal degree in co-relation 38647. Up to 23405 conditions per place. [2023-11-26 11:54:18,133 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 63 selfloop transitions, 7 changer transitions 1/78 dead transitions. [2023-11-26 11:54:18,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 367 flow [2023-11-26 11:54:18,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:54:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:54:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-26 11:54:18,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7254901960784313 [2023-11-26 11:54:18,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-26 11:54:18,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-26 11:54:18,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:18,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-26 11:54:18,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2023-11-26 11:54:18,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2023-11-26 11:54:18,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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) [2023-11-26 11:54:18,172 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 124 flow. Second operand 3 states and 111 transitions. [2023-11-26 11:54:18,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 367 flow [2023-11-26 11:54:18,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 78 transitions, 321 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-26 11:54:18,222 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 147 flow [2023-11-26 11:54:18,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2023-11-26 11:54:18,230 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2023-11-26 11:54:18,231 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 147 flow [2023-11-26 11:54:18,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2023-11-26 11:54:18,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:18,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:18,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:54:18,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:54:18,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:18,235 INFO L85 PathProgramCache]: Analyzing trace with hash -220257736, now seen corresponding path program 1 times [2023-11-26 11:54:18,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:18,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660041187] [2023-11-26 11:54:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:18,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:18,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:18,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660041187] [2023-11-26 11:54:18,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660041187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:18,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:18,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:54:18,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381715236] [2023-11-26 11:54:18,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:18,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:18,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:18,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:18,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:18,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-26 11:54:18,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:18,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:18,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-26 11:54:18,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:22,133 INFO L124 PetriNetUnfolderBase]: 27899/32452 cut-off events. [2023-11-26 11:54:22,134 INFO L125 PetriNetUnfolderBase]: For 8359/8359 co-relation queries the response was YES. [2023-11-26 11:54:22,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80549 conditions, 32452 events. 27899/32452 cut-off events. For 8359/8359 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 114329 event pairs, 1893 based on Foata normal form. 294/32674 useless extension candidates. Maximal degree in co-relation 21818. Up to 14321 conditions per place. [2023-11-26 11:54:22,516 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 116 selfloop transitions, 10 changer transitions 0/133 dead transitions. [2023-11-26 11:54:22,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 133 transitions, 635 flow [2023-11-26 11:54:22,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:54:22,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:54:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2023-11-26 11:54:22,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7098039215686275 [2023-11-26 11:54:22,520 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 181 transitions. [2023-11-26 11:54:22,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 181 transitions. [2023-11-26 11:54:22,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:22,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 181 transitions. [2023-11-26 11:54:22,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.2) internal successors, (181), 5 states have internal predecessors, (181), 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) [2023-11-26 11:54:22,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:22,524 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:22,525 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 147 flow. Second operand 5 states and 181 transitions. [2023-11-26 11:54:22,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 133 transitions, 635 flow [2023-11-26 11:54:22,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 133 transitions, 623 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:54:22,530 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 205 flow [2023-11-26 11:54:22,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2023-11-26 11:54:22,531 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -4 predicate places. [2023-11-26 11:54:22,531 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 205 flow [2023-11-26 11:54:22,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:22,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:22,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:22,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:54:22,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:54:22,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:22,534 INFO L85 PathProgramCache]: Analyzing trace with hash 378951248, now seen corresponding path program 2 times [2023-11-26 11:54:22,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:22,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081259669] [2023-11-26 11:54:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:22,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:22,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:22,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081259669] [2023-11-26 11:54:22,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081259669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:22,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:22,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:54:22,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21292367] [2023-11-26 11:54:22,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:22,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:22,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:22,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:22,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:22,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-26 11:54:22,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:22,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:22,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-26 11:54:22,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:25,823 INFO L124 PetriNetUnfolderBase]: 26725/31324 cut-off events. [2023-11-26 11:54:25,824 INFO L125 PetriNetUnfolderBase]: For 20110/20110 co-relation queries the response was YES. [2023-11-26 11:54:25,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88446 conditions, 31324 events. 26725/31324 cut-off events. For 20110/20110 co-relation queries the response was YES. Maximal size of possible extension queue 957. Compared 114216 event pairs, 5591 based on Foata normal form. 646/31688 useless extension candidates. Maximal degree in co-relation 24190. Up to 16295 conditions per place. [2023-11-26 11:54:26,143 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 114 selfloop transitions, 10 changer transitions 0/131 dead transitions. [2023-11-26 11:54:26,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 131 transitions, 670 flow [2023-11-26 11:54:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:54:26,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:54:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 181 transitions. [2023-11-26 11:54:26,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7098039215686275 [2023-11-26 11:54:26,148 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 181 transitions. [2023-11-26 11:54:26,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 181 transitions. [2023-11-26 11:54:26,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:26,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 181 transitions. [2023-11-26 11:54:26,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.2) internal successors, (181), 5 states have internal predecessors, (181), 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) [2023-11-26 11:54:26,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:26,155 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:26,155 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 205 flow. Second operand 5 states and 181 transitions. [2023-11-26 11:54:26,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 131 transitions, 670 flow [2023-11-26 11:54:26,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 131 transitions, 670 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:54:26,192 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 259 flow [2023-11-26 11:54:26,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2023-11-26 11:54:26,194 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-11-26 11:54:26,195 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 259 flow [2023-11-26 11:54:26,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:26,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:26,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:26,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:54:26,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:54:26,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:26,197 INFO L85 PathProgramCache]: Analyzing trace with hash -475165545, now seen corresponding path program 1 times [2023-11-26 11:54:26,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:26,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068126987] [2023-11-26 11:54:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:26,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:26,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:26,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068126987] [2023-11-26 11:54:26,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068126987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:26,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:26,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:54:26,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809031352] [2023-11-26 11:54:26,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:26,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:26,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:26,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:26,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:26,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-26 11:54:26,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 259 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:26,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:26,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-26 11:54:26,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:29,465 INFO L124 PetriNetUnfolderBase]: 26767/31320 cut-off events. [2023-11-26 11:54:29,465 INFO L125 PetriNetUnfolderBase]: For 37517/37517 co-relation queries the response was YES. [2023-11-26 11:54:29,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94394 conditions, 31320 events. 26767/31320 cut-off events. For 37517/37517 co-relation queries the response was YES. Maximal size of possible extension queue 958. Compared 114909 event pairs, 2135 based on Foata normal form. 486/31734 useless extension candidates. Maximal degree in co-relation 47609. Up to 13835 conditions per place. [2023-11-26 11:54:29,696 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 119 selfloop transitions, 8 changer transitions 0/134 dead transitions. [2023-11-26 11:54:29,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 134 transitions, 718 flow [2023-11-26 11:54:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:54:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:54:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2023-11-26 11:54:29,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2023-11-26 11:54:29,700 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 180 transitions. [2023-11-26 11:54:29,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 180 transitions. [2023-11-26 11:54:29,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:29,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 180 transitions. [2023-11-26 11:54:29,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2023-11-26 11:54:29,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:29,703 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:29,703 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 259 flow. Second operand 5 states and 180 transitions. [2023-11-26 11:54:29,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 134 transitions, 718 flow [2023-11-26 11:54:29,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 134 transitions, 709 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-26 11:54:29,906 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 264 flow [2023-11-26 11:54:29,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-11-26 11:54:29,913 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-11-26 11:54:29,914 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 264 flow [2023-11-26 11:54:29,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:29,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:29,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:29,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:54:29,915 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:54:29,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash -652827620, now seen corresponding path program 1 times [2023-11-26 11:54:29,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:29,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222139117] [2023-11-26 11:54:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:29,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:30,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:30,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222139117] [2023-11-26 11:54:30,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222139117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:30,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:30,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:54:30,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133134479] [2023-11-26 11:54:30,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:30,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:30,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:30,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-26 11:54:30,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:30,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:30,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-26 11:54:30,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:33,809 INFO L124 PetriNetUnfolderBase]: 36005/42951 cut-off events. [2023-11-26 11:54:33,809 INFO L125 PetriNetUnfolderBase]: For 70354/70354 co-relation queries the response was YES. [2023-11-26 11:54:33,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135319 conditions, 42951 events. 36005/42951 cut-off events. For 70354/70354 co-relation queries the response was YES. Maximal size of possible extension queue 1416. Compared 175958 event pairs, 5689 based on Foata normal form. 912/43537 useless extension candidates. Maximal degree in co-relation 67525. Up to 20703 conditions per place. [2023-11-26 11:54:34,396 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 150 selfloop transitions, 8 changer transitions 0/165 dead transitions. [2023-11-26 11:54:34,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 165 transitions, 1104 flow [2023-11-26 11:54:34,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:54:34,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:54:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2023-11-26 11:54:34,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7176470588235294 [2023-11-26 11:54:34,398 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 183 transitions. [2023-11-26 11:54:34,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 183 transitions. [2023-11-26 11:54:34,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:34,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 183 transitions. [2023-11-26 11:54:34,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 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) [2023-11-26 11:54:34,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:34,403 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:34,403 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 264 flow. Second operand 5 states and 183 transitions. [2023-11-26 11:54:34,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 165 transitions, 1104 flow [2023-11-26 11:54:34,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 165 transitions, 1077 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-26 11:54:34,446 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 310 flow [2023-11-26 11:54:34,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-11-26 11:54:34,451 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2023-11-26 11:54:34,451 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 310 flow [2023-11-26 11:54:34,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:34,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:34,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:34,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:54:34,452 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:54:34,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:34,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1110861684, now seen corresponding path program 2 times [2023-11-26 11:54:34,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:34,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662077468] [2023-11-26 11:54:34,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:34,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:34,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:34,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662077468] [2023-11-26 11:54:34,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662077468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:34,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:34,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:54:34,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274969598] [2023-11-26 11:54:34,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:34,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:34,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:34,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:34,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:34,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-26 11:54:34,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:34,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:34,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-26 11:54:34,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:38,050 INFO L124 PetriNetUnfolderBase]: 31831/37763 cut-off events. [2023-11-26 11:54:38,051 INFO L125 PetriNetUnfolderBase]: For 70501/70501 co-relation queries the response was YES. [2023-11-26 11:54:38,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135032 conditions, 37763 events. 31831/37763 cut-off events. For 70501/70501 co-relation queries the response was YES. Maximal size of possible extension queue 1227. Compared 146872 event pairs, 2108 based on Foata normal form. 488/38141 useless extension candidates. Maximal degree in co-relation 85477. Up to 16759 conditions per place. [2023-11-26 11:54:38,311 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 150 selfloop transitions, 11 changer transitions 0/168 dead transitions. [2023-11-26 11:54:38,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 168 transitions, 1170 flow [2023-11-26 11:54:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:54:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:54:38,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2023-11-26 11:54:38,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6941176470588235 [2023-11-26 11:54:38,314 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 177 transitions. [2023-11-26 11:54:38,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 177 transitions. [2023-11-26 11:54:38,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:38,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 177 transitions. [2023-11-26 11:54:38,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 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) [2023-11-26 11:54:38,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:38,317 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:38,317 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 310 flow. Second operand 5 states and 177 transitions. [2023-11-26 11:54:38,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 168 transitions, 1170 flow [2023-11-26 11:54:38,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 168 transitions, 1170 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:54:38,778 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 371 flow [2023-11-26 11:54:38,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=371, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2023-11-26 11:54:38,779 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2023-11-26 11:54:38,779 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 371 flow [2023-11-26 11:54:38,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:38,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:38,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:38,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:54:38,780 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:54:38,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:38,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1525399664, now seen corresponding path program 1 times [2023-11-26 11:54:38,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:38,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765334029] [2023-11-26 11:54:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:38,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:38,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:38,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765334029] [2023-11-26 11:54:38,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765334029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:38,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647692091] [2023-11-26 11:54:38,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:38,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:38,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:38,934 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:38,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:54:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:39,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:54:39,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:39,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:39,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647692091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:54:39,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:54:39,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-26 11:54:39,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497600080] [2023-11-26 11:54:39,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:39,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:54:39,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:39,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:54:39,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:54:39,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-26 11:54:39,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 371 flow. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 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) [2023-11-26 11:54:39,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:39,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-26 11:54:39,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:44,866 INFO L124 PetriNetUnfolderBase]: 41941/50812 cut-off events. [2023-11-26 11:54:44,866 INFO L125 PetriNetUnfolderBase]: For 141163/141163 co-relation queries the response was YES. [2023-11-26 11:54:45,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198148 conditions, 50812 events. 41941/50812 cut-off events. For 141163/141163 co-relation queries the response was YES. Maximal size of possible extension queue 1814. Compared 226786 event pairs, 6487 based on Foata normal form. 976/51130 useless extension candidates. Maximal degree in co-relation 123320. Up to 22832 conditions per place. [2023-11-26 11:54:45,319 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 179 selfloop transitions, 8 changer transitions 0/194 dead transitions. [2023-11-26 11:54:45,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 194 transitions, 1495 flow [2023-11-26 11:54:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:54:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:54:45,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 175 transitions. [2023-11-26 11:54:45,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2023-11-26 11:54:45,322 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 175 transitions. [2023-11-26 11:54:45,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 175 transitions. [2023-11-26 11:54:45,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:45,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 175 transitions. [2023-11-26 11:54:45,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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) [2023-11-26 11:54:45,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:45,324 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:45,324 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 371 flow. Second operand 5 states and 175 transitions. [2023-11-26 11:54:45,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 194 transitions, 1495 flow [2023-11-26 11:54:45,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 194 transitions, 1455 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-26 11:54:45,432 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 413 flow [2023-11-26 11:54:45,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=413, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2023-11-26 11:54:45,433 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2023-11-26 11:54:45,433 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 413 flow [2023-11-26 11:54:45,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 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) [2023-11-26 11:54:45,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:45,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:45,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:54:45,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_421bf717-0c0c-4686-9b7e-f7751b85167e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:45,647 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:54:45,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1837170805, now seen corresponding path program 1 times [2023-11-26 11:54:45,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:45,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815227925] [2023-11-26 11:54:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:45,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:46,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:46,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815227925] [2023-11-26 11:54:46,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815227925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:46,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:46,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:54:46,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797731906] [2023-11-26 11:54:46,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:46,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:46,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:46,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:46,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:46,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-26 11:54:46,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 413 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:46,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:46,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-26 11:54:46,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:51,358 INFO L124 PetriNetUnfolderBase]: 41233/49732 cut-off events. [2023-11-26 11:54:51,359 INFO L125 PetriNetUnfolderBase]: For 144662/144734 co-relation queries the response was YES. [2023-11-26 11:54:51,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213196 conditions, 49732 events. 41233/49732 cut-off events. For 144662/144734 co-relation queries the response was YES. Maximal size of possible extension queue 1771. Compared 218855 event pairs, 2323 based on Foata normal form. 720/50346 useless extension candidates. Maximal degree in co-relation 132714. Up to 22481 conditions per place. [2023-11-26 11:54:51,824 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 171 selfloop transitions, 8 changer transitions 0/186 dead transitions. [2023-11-26 11:54:51,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 186 transitions, 1409 flow [2023-11-26 11:54:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:54:51,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:54:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 176 transitions. [2023-11-26 11:54:51,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6901960784313725 [2023-11-26 11:54:51,826 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 176 transitions. [2023-11-26 11:54:51,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 176 transitions. [2023-11-26 11:54:51,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:51,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 176 transitions. [2023-11-26 11:54:51,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 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) [2023-11-26 11:54:51,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:51,828 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:51,828 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 413 flow. Second operand 5 states and 176 transitions. [2023-11-26 11:54:51,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 186 transitions, 1409 flow [2023-11-26 11:54:52,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 186 transitions, 1409 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:54:52,905 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 429 flow [2023-11-26 11:54:52,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=429, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2023-11-26 11:54:52,906 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 28 predicate places. [2023-11-26 11:54:52,906 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 429 flow [2023-11-26 11:54:52,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:52,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:54:52,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:54:52,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:54:52,908 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:54:52,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:52,908 INFO L85 PathProgramCache]: Analyzing trace with hash 281479722, now seen corresponding path program 2 times [2023-11-26 11:54:52,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:52,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533187158] [2023-11-26 11:54:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:52,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:54:53,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:53,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533187158] [2023-11-26 11:54:53,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533187158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:53,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:53,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:54:53,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68832242] [2023-11-26 11:54:53,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:53,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:53,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:53,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:53,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:53,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-26 11:54:53,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 429 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:54:53,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:54:53,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-26 11:54:53,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:54:58,123 INFO L124 PetriNetUnfolderBase]: 36869/44596 cut-off events. [2023-11-26 11:54:58,123 INFO L125 PetriNetUnfolderBase]: For 150999/150999 co-relation queries the response was YES. [2023-11-26 11:54:58,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196519 conditions, 44596 events. 36869/44596 cut-off events. For 150999/150999 co-relation queries the response was YES. Maximal size of possible extension queue 1570. Compared 190385 event pairs, 2389 based on Foata normal form. 484/44722 useless extension candidates. Maximal degree in co-relation 122566. Up to 19552 conditions per place. [2023-11-26 11:54:58,881 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 182 selfloop transitions, 11 changer transitions 0/200 dead transitions. [2023-11-26 11:54:58,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 200 transitions, 1642 flow [2023-11-26 11:54:58,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:54:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:54:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 173 transitions. [2023-11-26 11:54:58,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6784313725490196 [2023-11-26 11:54:58,883 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 173 transitions. [2023-11-26 11:54:58,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 173 transitions. [2023-11-26 11:54:58,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:54:58,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 173 transitions. [2023-11-26 11:54:58,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 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) [2023-11-26 11:54:58,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:58,886 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 51.0) internal successors, (306), 6 states have internal predecessors, (306), 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) [2023-11-26 11:54:58,886 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 429 flow. Second operand 5 states and 173 transitions. [2023-11-26 11:54:58,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 200 transitions, 1642 flow [2023-11-26 11:55:00,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 200 transitions, 1605 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-26 11:55:00,134 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 479 flow [2023-11-26 11:55:00,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=479, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2023-11-26 11:55:00,136 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2023-11-26 11:55:00,136 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 479 flow [2023-11-26 11:55:00,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:55:00,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:55:00,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:00,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:55:00,137 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 11:55:00,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:00,138 INFO L85 PathProgramCache]: Analyzing trace with hash 274110769, now seen corresponding path program 1 times [2023-11-26 11:55:00,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:00,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775405828] [2023-11-26 11:55:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:00,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:55:00,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:00,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775405828] [2023-11-26 11:55:00,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775405828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:00,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:00,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:00,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424468267] [2023-11-26 11:55:00,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:00,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:55:00,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:00,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:55:00,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:55:00,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2023-11-26 11:55:00,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 479 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2023-11-26 11:55:00,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:55:00,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2023-11-26 11:55:00,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand